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Case Study

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.

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Case Study

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  1. Case Study 2006 Pontiac G6 - No Generic Communication

  2. 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.

  3. 2006 Pontiac G6

  4. 2006 Pontiac G6 • The first step is to review communication schematics for the vehicle you are working on. • This is a GMLAN communication protocol.

  5. Data Link Communications

  6. 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.

  7. 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.

  8. DLC

  9. 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.

  10. Powertrain Control Module

  11. Body Control Module

  12. 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)

  13. Disconnect at the BCM

  14. 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

  15. 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.

  16. 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.

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