Diagnostic Test

CHECK THE VEHICLE INFORMATION NUMBER (VIN)
NOTE:
If the controller was updated, the VIN may need to be written into the EVCU.
1. Turn the ignition on.
2. With the scan tool, under Electric Vehicle Control Unit (EVCU) Misc Functions, check if the VIN is written to the EVCU and is the correct VIN.
  Is VIN written in the EVCU and is it the correct VIN?
  
  Yes
  - Go To 2
  No
  - Write the VIN or the proper VIN in the Electric Vehicle Control Unit (EVCU).
  - Perform the EVCU VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE VEHICLE INFORMATION NUMBER (VIN) TO THE BODY CONTROL MODULE (BCM)
1. With the scan tool, under Body Control Module (BCM) and compare it to the VIN written in the EVCU.
  Is VIN written in the BCM correct and matches the VIN in the EVCU?
  
  Yes
  - Go To 3
  No
  - Write the proper VIN in the Body Control Module (BCM).
  - Perform the EVCU VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK IF THE DTC RESETS
1. With the scan tool, erase Electric Vehicle Control Unit EVCU DTCs.
2. Turn the ignition off. Remove the key from the Ignition Switch, close doors and allow the EVCU to shut down.
  NOTE:
  Allow up to two minutes for the EVCU to shut down. Opening the vehicle door will interrupt the shut down process.
3. Turn the ignition on.
4. With the scan tool, read EVCU DTCs.
  Does this DTC reset?
  
  Yes
  - Go To 4
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to STANDARD PROCEDURE .
ELECTRIC VEHICLE CONTROL UNIT (EVCU)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors to the Electric Vehicle Control Unit (EVCU).
2. Look for any chafed, pierced, pinched or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals.
4. Perform any Technical Service Bulletins that may apply.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the EVCU VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace and program the Electric Vehicle Control Module (EVCU) in accordance with the Service Information. Refer to UNIT, ELECTRIC VEHICLE CONTROL (EVCU), REMOVAL .
  - Perform the EVCU VERIFICATION TEST. Refer to STANDARD PROCEDURE .