B21C2

B21C2-GROUND LEFT REAR WINDOW AND HEADER MISSING - PTCM





For a complete wiring diagram Consult Diagrams/Electrical.

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

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





Diagnostic Test

1. TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase all PTCM DTC's.
Try to operate the Power Top Switch.
Wait 30 seconds.
With the scan tool, read all PTCM DTC's.
Does the scan tool display this DTC as active?

Yes

- Go to 2

No

- The condition that caused this symptom is currently not present. 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 BODY VERIFICATION TEST - VER 1.Body Verification Test

2. (Q992) LEFT REAR WINDOW RETURN CIRCUIT OPEN




Disconnect the PTCM C1 harness connector.
Measure the resistance of the (Q992) Left Rear Window Return circuit between the PTCM C1 harness connector and the Left Rear Window Motor harness connector.
Does the ohm meter read open circuit?

Yes

- Repair the (Q992) Left Rear Window Return circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Go to 3

3. (Q979) ROOF MOTOR LATCH SIGNAL CIRCUIT OPEN




Disconnect the PTCM C2 harness connector.
Measure the resistance of the (Q979) Roof Motor Latch Signal circuit between the PTCM C2 harness connector and the Roof Motor Latch harness connector.
Does the ohm meter read open circuit?

Yes

- Repair the (Q979) Roof Motor Latch Signal circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Go to 4

4. (Q980) ROOF MOTOR UNLATCH SIGNAL CIRCUIT OPEN




Measure the resistance of the (Q980) Roof Motor Unlatch Signal circuit between the PTCM C2 harness connector and the Roof Motor Latch harness connector.
Does the ohm meter read open circuit?

Yes

- Repair the (Q980) Roof Motor Unlatch Signal circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Replace the Power Top Control Module (PTCM).
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.