B21C2

B21C2-PTCM LEFT WINDOW/HEADER MOTOR GROUND CIRCUIT







- When Monitored:
With the Ignition Switch in the on position and the Power Top Control Module (PTCM) awake.

- Set Condition:
This code will set if the Power Top Control Module (PTCM) senses a loss of ground that supplies ground for the Left Rear Window Motor and the Roof Header Motor.





Always perform the Power Top System Pre-Diagnostic procedure before proceeding. Power Top System Pre-Diagnostic Procedure.

1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, record and erase all PTCM DTCs.
3. Try to operate the Power Top from the Switch.
4. Wait 30 seconds.
5. With the scan tool, read all PTCM DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- The condition that caused this symptom is currently not present. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. (Z916) GROUND CIRCUIT OPEN




1. Turn the ignition off.
2. Disconnect the PTCM C2 connector.
3. Using a 12-volt test light connected to 12-volts, check the (Z916) Ground circuit.

Does the test light illuminate brightly?

No

- Repair the (Z916) Ground circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

Yes

- Replace the Power Top Control Module (PTCM).
- Perform the BODY VERIFICATION TEST. Body Verification Test.