Archive for March 2014

Results of 2013 North American Technician Survey

In September and October, 2013, technicians in U.S. auto dealerships were given the opportunity to participate in an annual Technician Survey, conducted by Carlisle & Company, a provider of aftersales strategic guidance and tactical solutions for the world’s leading motor vehicle brands.

 

About the Survey

 

About 9,000 service technicians representing 15 automotive OEMs/brands chose to participate. The purpose of the survey is to collect feedback on dealership service trends, technician satisfaction, and dealership operational challenges as well as to gain a better understanding about whether technicians receive the appropriate level of support from the manufacturer and their dealership.

 

TIP: As a result of feedback from the 2012 survey, the GM Service Technical College (STC) has opened two new satellite training centers to address the preference for more hands-on training classes. In addition, a need for more timely responses by the Technical Assistance Center (TAC) has been addressed by an improved escalation process to resolve issues in less time.

 

Here are the results of the 2013 survey.

 

About the Technicians

 

The average technician is about 41 years old, and has been working for 19 years as a technician. Most technicians have spent about half their careers with their current dealership.

 

Younger technicians are more likely than older ones to have obtained their education in a trade school or a 2-year college; older ones were more likely educated in a 4-year college or in the military.

 

Why They Chose Their Current Job

 

Respondents could select from fifteen reasons for choosing their current job. The top three reasons they gave were: brand interest, pay, and dealership location. The bottom reasons were benefits, labor times, tech training, and other. The other choices included (in no particular order) personal, work environment, career advancement, management, volume of business, working hours, award programs and none.

 

Satisfaction with Job Choice

 

When asked, “Do you feel like you made the right decision when selecting this job?” the highest satisfaction was among those who chose their job based on management or working environment.

 

Another question presented eight factors that contributed to satisfaction with the current job.Tech training got the highest score, followed by (in order) work quality, work environment, management, OEM concern, career, pay, and warranty labor rates.

 

How Technicians Spend Their Time

 

Technicians spend 20–40% of their time on diagnostic work, 25% on routine maintenance, with the remainder going to heavy repair, lube/oil/filter, and other.

 

About 50% of their work time is spent on warranty work.

 

Earning Ratios

 

Earning ratios are defined as hours earned vs. hours worked. These ratios varied from just over 100% to about 130%. High earned ratios are not a strong driver of high annual pay. Instead, high hourly rates (typically found at luxury brands) are a bigger driver of annual pay.

 

Career Progression

 

On average, only 27% of technicians stated that they were satisfied with their career progression. Not surprisingly, those who are relatively satisfied with their career progression want to stay at their same job at same dealership, while those that are not satisfied want either to increase their certification or to exit the industry.

 

Technicians who feel “stuck” see this as an industry problem, not a dealership problem. Relatively few technicians who are dissatisfied want to change dealerships.

 

Lube/Oil/Filter Work

 

Lube/Oil/Filter (LOF) is seen as an entry-level position. Twenty-one percent (21%) of technicians spend more than 20% of their time on LOF, yet very few dealerships have a career progression plan for these technicians. The more time a technician spends on LOF, the lower their satisfaction with their career progression, and the more they question whether they took the right job.

 

Improving Repairs

 

Improved parts availability was the most often cited factor to enable efficient, quality repairs. Respondents said the top parts availability problem was that their dealership doesn’t stock enough inventory, followed by ordering the wrong part, and the OEM doesn’t respond in a timely fashion.

 

The second factor to enable efficient, quality repairs was improved communication between the service consultant and the technician. Technicians reported that on average, 43% of all repair orders require service consultant clarification, which consumes about 30 minutes per day per technician. Additionally, about 1/3 of customers are provided unrealistic waiting times.

 

Other factors to enable efficient, quality repairs were tech training, special tools, online or phone tech support and new model support.

 

Tech Training

 

Of all the categories on the survey, technicians reported the highest satisfaction with technical training (“brand provides the right technical training” and “my dealership supports me in obtaining training”). The more clear an OEM’s training requirements, the higher the overall satisfaction with their technical training.

 

The average technician obtains about 100 hours of tech training per year. The most satisfied technicians spend the most hours in training, spend the most training hours at in-person training centers, and spend the fewest hours in self-study.

 

Special Tools

 

Special tools are considered appropriate, but they’re not being stocked sufficiently. The industry average is only about 4% of technicians who say that their dealership stocks a sufficient assortment of special tools. And 2/3 of the industry does not have a special tools management system.

 

On average, each special tool is shared by about seven technicians.

 

Service Information

 

Technicians were asked to rate their OEMs service information using evaluators such as “easy to understand,” “easy to find,” “accurate and complete,” etc.

 

Service bulletins ranked the highest satisfaction with technicians. Wiring diagrams and online information ranked somewhat lower.

 

Interestingly, service managers consistently have higher satisfaction with service information than technicians do.

 

Critical Factors

 

Two of the most critical factors revealed by this study are these:

 

• Dealerships need to focus on creating a career path for technicians. Otherwise, technicians may become frustrated and leave the industry. • Communication between service consultants and technicians needs to improve, to ensure that they work as a unified team.

 

– Thanks to Diana Sancya

 

Discontinued Techline Support for Internet Explorer 8

GM is updating the Dealership Infrastructure Guidelines to indicate that Internet Explorer 9 (IE 9) is the recommended and minimum browser. With this change, GM will discontinue support for Internet Explorer (IE) 8 on April 14, 2014.

 

A recent query of Techline PC browser use shows most computers are already on IE 9, with less than 20% of computers using IE 8.

 

TIP: In the next 30 days, please update to IE 9 if you have not done so already.

 

To update to IE 9, go to following link and select the appropriate operating system under English:

http://windows.microsoft.com/en-us/internet-explorer/ie-9-worldwide-languages

 

The use of other browsers, as well as IE 10 and IE 11, are common questions taken by the Techline Customer Support Center (TCSC). At this time, GM does not endorse the use of IE 10 or 11. Although both browsers are available for download from Microsoft, the Techline applications (SI, TIS2Web, GDS2, Tech2Win, etc.) have not been tested against the newest IE browser versions. In addition, there is no plan to approve the use of other browsers, such as Firefox, Safari, Chrome, etc.

 

Any questions regarding browser use on Techline PCs should be directed to the TCSC at 1-800-828-6860 (English) or 1-800-503-3222 (French).

 

– Thanks to Lisa Scott

 

ELR Door Glass Adjustment

There may be a wind noise condition on some 2014 ELRs related to the driver’s or passenger’s door glass. Following are some guidelines to help identify a leak and to properly adjust the door glass on the ELR.

 

Before beginning any adjustments:

• Take a road test at speeds above 35 mph (56 km/h)  to verify the wind noise condition.

• Confirm that the body door opening weatherstrip is firmly seated in the channel, especially on the horizontal edge.

• Inspect for a tight, flush joint where the front quarter glass weatherstrip meets the door glass weatherstrip.

• Proper door glass fit can be verified by closing the door and allowing the glass to index. The top of the glass should be pushed up into the weatherstrip.

 

Measure Door Glass Position

 

If the leak appears to be located at the top of the glass, or the weatherstrip is not wrapped around the glass when it’s closed, use a marker and tape to measure the door glass position. (Fig. 1) The top edge of the glass to the mark on the tape should be 5 millimeters, +/- 2 millimeters. Also measure the gap between the rear of the door glass and the quarter glass. It should be 10 millimeters, +/- 1.5 millimeters. The gap measurements should be fairly even top to bottom, within 1.5 millimeters.

 

F01 door glass measurement

Fig 1

 

If the wind noise is at the front of the glass, Leak Trace Powder can be used to verify that the glass is properly contacting the weatherstrip when closed. Any gaps in the powder may indicate poor contact between the glass and weatherstrip.

 

TIP: Cover the suede portion of the door trim panel when using Leak Trace Powder. The powder is very difficult to remove from this material.

 

Glass Adjustment

 

To adjust the glass, remove the door trim panel following the appropriate Service Information.

 

Make alignment marks for the rear edge of the door glass by placing tape on the weatherstrip between the door glass and the quarter glass. Mark the tape 10 millimeters from the forward edge of the quarter glass in two places. (Fig. 2) Next, make alignment marks for the top of the glass by placing two pieces of tape along the top of the door glass (one approximately over each of the window regulator channels) and mark each piece of tape five millimeters from the edge of the glass.

 

F02 door glass align marks

Fig 2

 

Remove the two plastic plugs behind the upper corners of the water deflector to access to the window regulator nuts. Loosen both upper regulator channel nuts about one half turn to allow adjustment. (Fig. 3)

 

F03 door glass reg nuts

Fig 3

 

With the door closed and the glass indexed up, have an assistant outside the vehicle move the glass into alignment. (Fig. 4) The rear edge of the glass should be aligned with the marks on the tape between the door and quarter glass and the top edge of the glass should be aligned with the tape marks at the door opening reveal molding. Once the glass is properly aligned, tighten the regulator nuts.

 

F04 door glass adjust

Fig 4

 

Open and close the door to check alignment and readjust if necessary. Torque the regulator nuts to specification and reinstall the plastic plugs.

 

TIP: Before reinstalling the trim panel, the retaining clips should always be replaced. If they are not, the panel may become loose over time. Match the clip color to the proper location.

 

Window Motor Relearn Procedure

 

After adjusting the glass, it is necessary to perform the window motor relearn procedure using GDS 2.

 

After exiting the scan tool learn procedure completely, the window motor must be normalized in order to perform the express up and express down functions. With the door closed and the window in the fully raised position, press and hold the power window switch until the window is fully open. Continue holding the switch down for an additional five seconds. Next, pull up the power window switch until the window is fully closed. Again, continue holding the switch up for an additional five seconds.

 

For more information about ELR door glass adjustments, view the March 2014 Emerging Issues seminar, 10214.03D (U.S. only).

 

– Thanks to Chuck Wieseckel

Removing a Transportation Cover

Beginning this month, the 2014 ELR will use a transportation cover to help protect the vehicle while in transport as well as in dealership inventory. (Fig. 5) The 2014 Corvette uses a similar cover.

 

The transportation cover must be partially removed in order to perform the Pre-Delivery Inspection (PDI). It can be reinstalled to protect the vehicle until delivery.

 

F05 cover 1

Fig 5

 

To enter the vehicle, unzip the cover over the driver’s door, roll it up and secure it using the Velcro strap and retaining flap above the door. There also are zippered openings to access the fuel door and the charge port door.

 

To partially remove the cover for the PDI, begin by releasing the tape holding the cover to the rear quarter glass. Open the driver’s door and unclip the retainers holding the cover to the rocker and B pillar. Pull the inner part of the cover out of the door area.

 

Unhook the elastic from the front fascia and roll the edge of the cover back slightly to remove any debris. Repeat this procedure for the rear fascia.

 

Next, unhook the clips from the floor pan bracket along the right and left sides of the vehicle. In each of the four wheel openings, release the hard flap holding the cover.

 

From the rear of the vehicle, fold the cover from the left and right sides toward the middle (Fig. 6), and then roll the cover toward the front of the vehicle, stopping at the windshield.

 

F06 cover 2

Fig 6

 

To release the hood portion of the cover, with the hood open, pull the cover from below the front fascia. Release the cover from the hood stops. Lift it up and over the hood. (Fig. 7) Leave the cover attached to, and resting on the windshield. Release the center clip and the Velcro fasteners on the rear corners of the hood and release the cover from the hood striker. Starting at one of the front corners, slip the cover off the hood. Pull the cover off the rear corners to remove it from the vehicle.

 

F07 cover 3

Fig 7

 

Simply reverse this procedure to reinstall the cover to protect the painted surface of the vehicle during storage.

 

TIP: To avoid paint damage, do not install the transportation cover on a dirty vehicle surface.

 

To remove the cover completely, gently pull the tape from the windshield. Fold the tape back onto the cover to prevent the cover from sticking together. Place both sections of the cover in the vehicle for the customer.

 

To watch a video of the removal of the ELR transportation cover, check out the March 2014 Emerging Issues seminar, 10214.03D (U.S. only).

 

– Thanks to Chuck Wieseckel

 

 

Power Memory Seat Operation

The power driver’s seat with memory recall and Easy Exit recall operations (Fig. 8) on some 2014 Corvettes (with the Memory Package, RPO AAB) may seem to operate erratically or intermittently. To help with diagnosis, it’s necessary to become familiar with the operational characteristics of this all-new system.

 

F08 Memory Seats W

Fig 8

 

Some common comments include:

• The seat won’t recall when entering the vehicle • The seat only moves when holding one of the memory buttons (button 1, 2 or the Exit button) • The seat stops moving when releasing a memory button • Sometimes the seat moves completely to the stored position by pressing and releasing a memory button

 

Seat Travel Limit Switches

 

The new Bulkhead Limit Switch, located on the left and right body harness conduit (Fig. 9), is used in both seating positions and acts to prevent damage to the body harness and seatback covers when the seat or seatback is moved in a rearward direction. When this switch is active (any time pressure is detected against the rear bulkhead/carpet area directly behind the seats), power seat movement is limited to movements that will bring the seat/seatback forward.

 F09 DSC02256

Fig 9

 

The new Seatback Unlock Switch, located inside the seatback assembly at the recliner mechanism, is used in both seat positions to prevent the seat from moving further rearward to ensure that the seatback can return to the normal upright position. When this switch is active (any time the seatback is manually folded forward), power seat movement is limited to movements that will bring the seat/seatback forward.

 

Both of these switches are viewable with the GDS2 scan tool. Common reasons for the Bulkhead Limit Switch being active are if the Easy Exit setting is stored in a position that applies pressure to the rear bulkhead or if an object is behind the seatback.

 

Supervised and Unsupervised Movements

 

Unlike prior models, the new system features unsupervised and supervised modes.

 

Unsupervised movement occurs when the operator has pressed and released, within 1/2 second, a memory button, which allows the seat to move on its own to a previously stored position.

 

TIP: Pressing any power seat button or memory button during unsupervised movement stops the seat. To resume recall operation, press and release, within 1/2 second, the desired memory button again.

 

Depending on transmission type, unsupervised movement will occur if:

Automatic transmission – The vehicle ignition is on, the transmission is in Park, and the Bulkhead Limit Switch Seatback and Unlock Switch are both inactive. • Manual transmission – The vehicle igntion is on, the clutch is depressed, the Parking Brake is applied, and the Bulkhead Limit Switch and Seatback Unlock Switch are both inactive.

 

Supervised movement occurs when a memory button is actively pressed and held, which allows the seat to move only while the operator is supervising the seat movement. Releasing the memory button will stop the seat movement. Only supervised memory recall operation can occur when the vehicle ignition is not in the On/Run Position. If the Bulkhead Limit Switch or Seatback Unlock Switch is active, either no operation will occur or supervised operation will occur, depending on which switch is active and the requested direction of seat travel.

 

Auto Memory Recall

 

The new memory seat system allows the operator to enable or disable the Auto Memory Recall operation of the seat. Auto Memory Recall is when the seat moves to a previously stored position either when opening the driver’s door or when the vehicle igntion is turned on. In order for auto recall to function, the feature must be turned on in the Settings menu of the infotainment system.

 

The operation of Auto Memory Recall is based on transmission type:

Automatic transmission; At Driver’s Door Open – When the vehicle ignition is off and the Unlock key fob button is pressed, auto recall will occur if the driver’s door is opened with four minutes. The seat position will be recalled to the set position if the Bulkhead Limit Switch or Seatback Unlock Switch is inactive. If the driver’s door is already open, pressing the Unlock key fob button will cause the seat to recall to the desired position if the Bulkhead Limit Switch or Seatback Unlock Switch is inactive.

• Automatic transmission; At Ignition On – When the vehicle ignition button is pressed, the seat position will be recalled to the set position without a memory button being pressed if the Bulkhead Limit Switch or Seatback Unlock Switch is inactive.

• Manual transmission – The only available selection is on or off. If turned on, when the vehicle ignition is off and the driver’s door is opened, the seat position will be recalled to the set position if the Bulkhead Limit Switch or Seatback Unlock Switch is inactive.

 

Easy Exit

 

The new memory system also allows the operator to enable or disable the Easy Exit Automatic Recall operation of the driver’s seat. This feature recalls the current driver’s previously stored Exit button position when exiting the vehicle. In order for the Easy Exit feature to function, it must be turned on in the Settings menu of the infotainment system.

 

Easy Exit recall automatically activates when one of the following occurs:

• The vehicle is turned off and the driver’s door is opened within a short time. • The vehicle is turned off with the driver’s door open. • The Exit button is pressed.

 

TIP: Similar to Auto Memory Recall, the operation of the Easy Exit recall will differ based on Transmission type. Refer to the Supervised/Unsupervised Movements section.

 

– Thanks to Jeremy Richardson

 

 

Incorrect Remote Control Door Lock Receiver

On some 2014 Cruze models, the doors may not unlock intermittently when pressing the door handle buttons (equipped with Passive Entry), the vehicle may not start when pushing the Start button (equipped with Passive Start), or the key fob will work only until the Body Control Module (BCM) goes to sleep (10-30 minutes). The physical key can be used to unlock the door if locked.

 

In some cases, these conditions may be caused by the incorrect K77 Remote Control Door Lock Receiver (RCDLR) installed during the vehicle build process.

 

Verify the correct K77 RCDLR is installed. Check for the following part numbers.

 

Vehicles equipped with Passive Entry/Passive Start (PEPS), RPO ATH and BTM: part number 13583332 (Black Dot) (Fig. 10)

 

F10 3648322

Fig 10

 

Vehicles not equipped with PEPS: part number 13503205 (No Black Dot) (Fig. 11)

 

F11 3648324

Fig 11

 

If the incorrect RCDLR is identified in the vehicle, install the correct module.

 

– Thanks to Christopher Hightower

Rear Toe Adjust Link Dampener

2010-2014 Lacrosse models equipped with the 4-link rear suspension (RPO GNC) built prior to February 19, 2014 have a dampener on the rear toe adjust link. (Fig. 12) GM Engineering has determined that this dampener does not make a noticeable impact on noise, vibration, or harshness and it has been eliminated from production.

 

F12 3768262

Fig 12

 

If making a repair on a vehicle and this dampener has been damaged or needs to be replaced, remove the dampener and washer and replace it with a shorter bolt (GM P/N 11561300). The nut remains the same. (Fig. 13) Discard the factory-installed dampener and washer. It is acceptable to have a dampener on only one side only of the rear suspension if the other side is unaffected by the repairs.

 F13 3768267

Fig 13

 

– Thanks to Christopher Crumb

 

Windshield Pop Noise during Cold Temperatures

Some 2012-2014 Enclave, Traverse and Acadia models May exhibit a pop- or itch-type noise at the windshield area while driving. If the noise is coming from the upper windshield area, the condition may be caused by the windshield alignment pins in the upper corners of the glass, 5 inches (12.7 cm) from the edge of the glass. Removal of the windshield is not necessary to remove the alignment pins.

Perform a road test to verify the condition. If the noise is heard in the area surrounding the upper windshield area, have an assistant push on the windshield alignment pins with a trim stick. If the noise changes or is gone, remove the windshield alignment pins. If the condition cannot be verified, inspect the windshield alignment pins for rub/wear marks. If rub/wear marks are present (Fig. 14), the pins will need to be removed.

 

F14 3766584

Fig 14

The windshield alignment pins are in the upper corners of the glass. To access the alignment pins, lower the front of the headliner and remove the windshield garnish molding. Next, remove the sunshade and anchors as well as the roof console assembly.

To remove the windshield alignment pins, slide a trim stick between the windshield and the alignment pin to separate the alignment pin from the windshield. (Fig. 15) It may be necessary to pull down on the body alignment hole to get the pin out.

F15 3766586

Fig 15

– Thanks to Jim Miller

Door Trim Removal

The side door lock lever may be damaged if the door trim is removed improperly on 2014 Silverado 1500 and Sierra 1500; 2015 Tahoe, Suburban, and Yukon models; 2014 Impala and CTS sedan; and 2013-2014 ATS models. These models are equipped with the Generation 2 door latch that uses the cross-car load belt clips for door trim attachment.

 

When removing the door trim for service, if the lock rod is left in the trim (Fig. 1), it can be bent too far and damage the lock lever on the door latch. (Fig. 2)

 

F01 door trim rod in

Fig 1

 

F02 door lock lever

Fig 2

 

To properly remove the door trim, control the angle of the door trim at the belt line so it stays close to the glass while removing the trim clips. Remove the lock rod from the trim before disconnecting the inside door handle cable and electrical connector. (Fig. 3) This will protect the lock lever from damage.

 

F03 door trim rod out

Fig 3

 

– Thanks to Keith Borowy

 

Corvette Radio Control Assembly Replacement

The radio control assembly on the 2014 Corvette is secured by 10 TORX PLUS® Tamper-Resistant fasteners. (Fig. 4) Removal of the assembly requires a T20 TORX PLUS® Tamper-Resistant drive tool.

 

The TORX PLUS Tamper-Resistant fasteners have a post in the center recess of the head and a five-point design, not the standard TORX PLUS six-point design. The drive tool is available from various aftermarket tool suppliers. Be sure to have all proper tools on hand before beginning a repair procedure.

 

F04 radio image

Fig 4

 

To remove the assembly, the instrument panel trim plate must first be removed. Pull the radio knobs straight off to allow the radio control to be separated from the trim plate. Refer to the appropriate Service Information for the complete repair procedure.

 

– Thanks to Rick Gatt

Transmission Information Summary

An updated summary of important transmission-related bulletins and Preliminary Information (PI) has been recently released to help build awareness of the latest transmission information available. The list provides a convenient resource for transmission technicians when performing transmission repairs.

 

Click to view a pdf of the transmission information summary. (Fig. 5)

 

F05 trans image

Fig 5

 

Prior to beginning any repairs, it’s critical to always follow Strategy-Based Diagnostics and check the appropriate Service Information for any bulletins or PIs that may apply.

 

In addition, go to www.centerlearning.com to learn more about the transmission training classes that are available in your area and online. In Canada, refer to the course catalog at www.gmprocanada.com.

 

– Thanks to Mike Johnston

 

Brake Booster Noise with Brakes Applied

On some 2013 Encores, an intermittent hoot, howl, whistle, whine or buzz noise may be heard when the brake pedal is applied while at a stop. The noise may seem to be originating at the auxiliary vacuum brake assist pump or the brake booster area. (Fig. 6) The noise condition may be very intermittent and difficult to duplicate. It also may seem to happen in higher ambient temperatures and with a hot engine after an extended drive.

 

If the noise is present, replace the brake booster vacuum hose with P/N 95412981.

 

F06 brake hose

Fig 6

 

For repair information, refer to the Power Brake Booster Vacuum Hose Replacement section of appropriate Service Information.

 

– Thanks to Matthew Zajechowski

Heated and Ventilated Seat Operation during a Remote Start

On the 2014 Chevrolet SS, the heated or ventilated seats must be enabled through the personalization menu or they will not turn on during a Remote Vehicle Start event.

 

After verifying that the vehicle’s heated or ventilated seats will not turn on after a remote start has been initiated, check the vehicle’s personalization menu to see if these options have been enabled. The heated and ventilated seats both have to be selected independently in order for each to operate.

 

To turn on both options, navigate to the Vehicle Settings > Climate and Air Quality menu and select both the Remote Start Auto Cool Seat option and Remote Start Auto Heat Seat option. (Fig. 7)

 

F07 settings menu

Fig 7

 

The system uses the information obtained from the Outside Ambient Temperature sensor on the vehicle. When it reads 80°F (27°C) or higher, it will allow the operation of the ventilated seats during a remote start. When it reads 50°F (10°C) or lower, the system will allow operation of the heated seat during a remote start. If the sensor reads anything in between these temperatures, neither the heated nor ventilated seats will turn on regardless if they are enabled in the personalization menu.

 

– Thanks to Matt Bierlein

Whine Noise at Start-up

A loud whine noise when the vehicle is first started may be heard from under the hood on the passenger side of some 2010-2014 Lacrosse and 2011-2014 Regal models. The noise may seem to be coming from the generator, but is a result of normal operation from brake booster electric vacuum pump, which is located behind the right front wheelhouse liner.

 

TIP: During diagnosis, if the generator is disconnected, the noise will be gone. However, it’s important to note that when system voltage is changed, vacuum pump voltage and RPM are also affected.

 

2010 LaCrosse and 2011 Regal with2.4L Engine (RPO LAF)

 

With the engine and ignition off, apply or pump the brake pedal three times to deplete the vacuum reserve. Turn the ignition to Run with the engine off. The brake booster electric vacuum pump should be heard running at the right front wheel opening below the generator. (Fig. 8) The pump should run for approximately 10 seconds and then shut off; with a maximum run time of 20 seconds.

 

If required, compare to a known good vehicle. Replace the brake booster electric vacuum pump only if an abnormal noise is heard.

 

F08 brake booster pump

Fig 8

 

2011-2014 LaCrosse and 2012-2014 Regal

 

With the ignition on and engine off, use GDS2 to select Module Diagnosis > Electronic Brake Control Module > Control Functions > Brake Booster Electric Vacuum Pump.

 

Command the pump on. It should be heard running at the right front wheel opening below the generator. Confirm this is the source of the condition.

 

If required, compare to a known good vehicle. Replace the brake booster electric vacuum pump only if an abnormal noise is heard.

 

– Thanks to Christopher Crumb

HVAC Control Module DTC U1510

During diagnosis of various heating and cooling conditions on some 2014 Camaro models, a current or history DTC U1510 (Lost Communication) may be set in the K33 HVAC Control Module. This DTC will set for a loss of communication with the A20 Radio/HVAC controls on the LIN Bus.

 

It has been found through warranty reviews that many HVAC modules have been reprogrammed for various HVAC issues if the original condition could not be duplicated. While there is an updated calibration available for the HVAC module in the 2014 Camaro, performing this update alone will not address the loss of communication DTC that was set in the system.

 

Instead of reprogramming, inspect the connections at the HVAC control module, which is located next to the blower motor under the passenger’s side of the instrument panel. (Fig. 9) Carefully inspect both connectors to make sure they are fully seated. Also inspect terminal tension using the appropriate diagnostic test probes; currently J-35616-16 (L-GN) and J-35616-64B (L-BU) for connectors 1 and 2, respectively. Replace any loose terminals as needed.

 

F09 HVAC control module

Fig 9

 

If no issues are found, flex the wiring harness in an attempt to duplicate the condition. If still no issues are found, carefully remove the radio faceplate from the radio itself and check the direct connections at that location.

 

– Thanks to Matt Bierlein

Inaccurate Outside Air Temperature Reading

On some 2014 Camaro models, the ambient air temperature display in the instrument cluster may be inaccurate. No DTCs will be set.

 

The inaccurate temperature reading is caused by a software anomaly inside the instrument panel cluster. A new calibration has been developed to correct this condition and is available in TIS2 Web. Reprogram the instrument panel cluster with the updated calibration.

 

– Thanks to Matt Bierlein

Service Know-How

10214.03D – Emerging Issues

March 13, 2014

 

To view Emerging Issues seminars:

• Log in to www.centerlearning.com

–   Select Resources, and then Video on Demand; or

–   Select Catalog to search for the course number, and then select View > Take or Continue Course

 

Car Issues – Fix It Right the First Time

 

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Screen Shot 2014-03-11 at 11.32.53 AM

Truck Issues – Fix It Right the First Time

 

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