2006 Pontiac G6 - No Generic Communication

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Presentation transcript:

2006 Pontiac G6 - No Generic Communication Case Study 2006 Pontiac G6 - No Generic Communication

2006 Pontiac G6 This vehicle was located at Haggerty Buick Pontiac. The concern is that the vehicle will communicate with the tech 2 scantool, but would not communicate with APPLUS equipment.

2006 Pontiac G6

2006 Pontiac G6 The first step is to review communication schematics for the vehicle you are working on. This is a GMLAN communication protocol.

Data Link Communications

2006 Pontiac G6 The second step is to OHM test between DLC pins 6 and 14. A BOB was attached to the vehicle at the DLC. The ohm value we would like to see is 60 ohms.

2006 Pontiac G6 The red ohmmeter lead was placed in pin 6 and the black lead was placed in pin 14. The ohm value noted on the DVOM was .505 Mohms or 505,000 ohms.

DLC

2006 Pontiac G6 The third step is to locate any modules that may house the terminating resistors. The BCM and PCM have been located and identified as these modules.

Powertrain Control Module

Body Control Module

2006 Pontiac G6 The BCM C2 was then disconnected with the connector to the PCM left intact. The ohm value on the DVOM was 120 ohms. (correct)

Disconnect at the BCM

2006 Pontiac G6 The BCM was then re-connected and the PCM C3 connector disconnected. The ohm value on the DVOM was 120 ohms. (correct) The PCM connector was then re-installed. Generic communication was restored

Summary There will be rare cases where a simple disconnect and re-connect may solve a communication issue . It is interesting to note that this was the first request for testing on this subject vehicle.

Summary No further concerns or issues were noted. Generic communication has been restored. Monitors must run and pass before returning to the emissions test facility.