B21C4

B21C4-GROUND RIGHT REAR WINDOW AND TONNEAU 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 Right Rear Window or the Tonneau.





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) RIGHT REAR WINDOW RETURN CIRCUIT OPEN




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

Yes

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

No

- Go to 3

3. (Q983) TONNEAU COVER MOTOR RETRACT SIGNAL CIRCUIT OPEN




Disconnect the PTCM C2 harness connector.
Disconnect the Tonneau Cover Motor harness connector.
Measure the resistance of the (Q983) Tonneau Cover Motor Retract Signal circuit between the PTCM C2 harness connector and the Tonneau Cover Motor harness connector.
Does the ohm meter read open circuit?

Yes

- Repair the (Q983) Tonneau Cover Motor Retract Signal circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Go to 4

4. (Q984) TONNEAU COVER MOTOR EXTEND SIGNAL CIRCUIT OPEN




Measure the resistance of the (Q984) Tonneau Cover Motor Extend Signal circuit between the PTCM C2 harness connector and the Tonneau Cover Motor harness connector.
Does the ohm meter read open circuit?

Yes

- Repair the (Q984) Tonneau Cover Motor Extend 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.