Circuit/System Verification

Ignition ON.
Verify that DTC B1370, B1380, or B1441 is not set.
- If any of the DTCs are set
  Refer to DTC B1370-B1379, B1380-B1389, or B1440-B1443 .
- If none of the DTCs are set
Verify the scan tool BCM Accessory parameter changes between Active and Inactive when turning the ignition ON and OFF.
- If the parameter does not change
  Refer to Power Mode Mismatch .
- If the parameter changes
Verify all available keys are correct for the vehicle. This can be accomplished by comparing the part number that is laser etched on the key to the part number listed in the parts catalog.
- If a key is not correct
  Replace the key.
- If all keys are correct
Verify the scan tool BCM Key Part Number parameter displays a Key Part Number when turning the ignition ON with each key.
- If a Key Part Number is not read
  Replace the appropriate key.
- If a Key Part Number is read for each key
All OK.