B257A

B257A-CONVERTIBLE TOP SWITCH CIRCUIT LOW





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 when the Convertible Top Switch or the (Q31) Convertible Top Switch Mux circuit is shorted to ground for more than 40 ms.





Diagnostic Test

1. TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase all PTCM DTC's.
Operate the Convertible Top Switch.
With the scan tool, check for active 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. CONVERTIBLE TOP SWITCH
Turn the ignition off.
Disconnect the Convertible Top Switch harness connector.
Turn the ignition on.
With the scan tool, erase all PTCM DTC's.
With the scan tool, check for active PTCM DTC's.
Does the scan tool display this DTC as active?

Yes

- Go to 3

No

- Replace the Convertible Top Switch.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test

3. (Q31) CONVERTIBLE TOP SWITCH MUX CIRCUIT SHORTED TO GROUND




Turn the ignition off.
Disconnect the Power Top Module C1 harness connector.
Measure the resistance between Ground and the (Q31) Convertible Top Switch Mux circuit.
Does the ohm meter read open circuit?

Yes

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

No

- Repair the (Q31) Convertible Top Switch Mux circuit for a short to ground.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test