Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

CHECK FOR AN INTERMITTENT CONDITION
NOTE:
This DTC will set when both the Left and Right Backup Lamp bulbs are burnt out or missing.
1. Turn the ignition on.
2. With the scan tool, clear all DTCs.
3. With the brakes firmly applied, shift the gear selector into REVERSE.
4. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 2
  No
  - Test complete. The condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (L15) LEFT BACKUP LAMP DRIVER CIRCUIT AND (L16) RIGHT BACKUP LAMP DRIVER CIRCUITS FOR AN OPEN
1. Shift the gear selector into PARK.
2. Turn the ignition off.
3. Disconnect the Left Tail Lamp Assembly harness connector.
4. Disconnect the Right Tail Lamp Assembly harness connector.
5. Disconnect the BCM C2 harness connector.
6. Measure the resistance of the (L15) Left Backup Lamp Driver circuit between the Left Tail Lamp Assembly harness connector and the BCM C2 harness connector.
7. Measure the resistance of the (L16) Right Backup Lamp Driver circuit between the Right Tail Lamp Assembly harness connector and the BCM C2 harness connector.
  Are the resistances below 5.0 Ohms?
  
  Yes
  - Go To 3
  No
  - Repair the open in the (L15) Left Backup Lamp Driver and (L16) Right Backup Lamp Driver circuits.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (Z941) GROUND CIRCUITS FOR AN OPEN
1. Using a 12-volt test light connected to 12-volts, check the (Z941) Ground circuit at the Left Tail Lamp Assembly harness connector.
2. Using a 12-volt test light connected to 12-volts, check the (Z941) Ground circuit at the Right Tail Lamp Assembly harness connector.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 4
  No
  - Repair the open in the (Z941) Ground circuits.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE BCM FOR CORRECT OPERATION
1. Turn the ignition off.
2. Reconnect the BCM C2 harness connector.
3. Connect a 12-volt test light between the (L15) Left Backup Lamp Driver circuit and the (Z941) Ground circuit at the Left Tail Lamp Assembly harness connector.
4. Turn the ignition on.
5. With the brakes firmly applied, shift the gear selector into REVERSE.
  Does the test light illuminate brightly?
  
  Yes
  - Replace the Left and Right Backup Lamp bulbs in accordance with the Service Information. Refer to LAMP, TAIL STOP TURN, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the BCM in accordance with the Service Information. Refer to MODULE, BODY CONTROL, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .