Diagnostic Test

1) VERIFY DTC IS ACTIVE
NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.

NOTE: Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.

With the scan tool, read active DTC's.

Is this DTC active?

Yes
1. Go To step 2).
No
1. Refer to *STORED LOST COMMUNICATION DTCS . Refer to DIAGNOSTIC CODE INDEX .
2. Perform BODY VERIFICATION TEST - VER 1 .
2) CHECK FOR ANY OF THE FOLLOWING ACTIVE DTC'S
With the scan tool, read all active DTC's from all modules.

NOTE: Check for BCM configuration, CAN C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTC's.

Does the scan tool display any active DTC's to the conditions listed above?

Yes
1. Diagnose and repair the DTC. Refer to DIAGNOSTIC CODE INDEX for a complete list of the symptoms.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Go To step 3).
3) VERIFY THAT THE BCM IS ACTIVE ON THE BUS
Turn the ignition on.

With the scan tool, select ECU View.

Verify that the BCM is active on the bus.

Is the BCM active on the bus?

Yes
1. Go To step 4).
No
1. Refer to DIAGNOSTIC CODE INDEX for a no response test procedure.
2. Perform BODY VERIFICATION TEST - VER 1 .
4) CHECK FOR ADDITIONAL COMMUNICATION RELATED DTC'S
With the scan tool, select Network View and select Advanced.

Is there more than one module with active DTC's "Logged Against" the BCM?

Yes
1. Replace/update the BCM in accordance with the service information.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Replace/update the module that set this DTC in accordance with the service information.
2. Perform BODY VERIFICATION TEST - VER 1 .