Monday, June 18, 2012
2008 Buick Enclave CXL 3.6L, V6 will not start will not crank
VEHICLE: 2008 Buick Enclave CXL 3.6L, V6, MFI, DOHC, VIN 7
Customer Concern: No start no crank.
No Electronic Control Module (ECM) communication.
Has Body Control Module (BCM) communication.
Ongoing body shop repairs.
Tests: 1. Key off, disconnect the scanner.
2. Check the resistance between pin 6 and 14 at the Data Link Connector (DLC). A value of 60
Ω +/- 10% is expected.
3. Disconnect the Electronic Control Module (ECM) at the radiator core support.
4. Check the resistance between pin 33 and 55 in the ECM Gray connector. A value of 60Ω +/- 10% is expected.
5. If the resistance is wrong, check for disconnected components or wiring and connection problems on the high speed GMLAN.
Potential Causes: Failed High Speed GMLAN
Confirmed Fix: Installed Headlight Control Module
Tech Tips: Note: Refer to wiring diagrams to decide options and early or late production.
The Headlamp Control Module is a part of the right headlight assembly.
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