Diagnostic Test

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 2.
No
1. Perform the *STORED LOST COMMUNICATION DTCS test procedure.
CHECK FOR ANY OF THE FOLLOWING ACTIVE DTC'S
With the scan tool, read all active DTC's from all modules.

NOTE: Check for TIPM configuration, CAN B or 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 the DIAGNOSTIC CODE INDEX for a complete list of the symptoms.
No
1. Go To 3.
VERIFY THAT THE TIPM IS ACTIVE ON THE BUS
Turn the ignition on.

With the scan tool, select ECU View.

Verify that the TIPM is active on the bus.

Is the TIPM active on the bus?

Yes
1. Go To 4.
No
1. Refer to appropriate NO RESPONSE test procedure. See DIAGNOSIS AND TESTING .
CHECK FOR ADDITIONAL COMMUNICATION RELATED DTC'S
With the scan tool, select Network Diagnostics and select Advanced.

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

Yes
1. Replace/update the Totally Integrated Power Module (TIPM) 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 the appropriate VERIFICATION TEST.