Convertible Top: 9921

9921 POWER TOP SWITCH (ROOF OPEN/CLOSE) CIRCUIT SHORT TO B(+)

9921 Power Top Switch (Roof Open/Close) Circuit Short To B(+):

WHEN MONITORED
Continuous with the ignition on.

SET CONDITION
When the Power Top Control Module (PTCM) senses high current flow at the Power Top Switch (Open/Close) sense.

POSSIBLE CAUSES
- Power top switch indicator driver circuit shorted to B(+)
- Power top switch
- Power top control module

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

DIAGNOSTIC TEST

1. Power Top Switch




Turn the ignition off.
Disconnect the Power Top Switch harness connector.

NOTE: Check connectors - Clean/repair as necessary.

Measure the resistance between the Power Top Switch Signal circuit and the Power Top Switch Indicator Driver circuit from the Power Top Switch connector.

Q: Is the resistance below 5.0 ohms?

YES: Replace the Power Top Switch. Perform POWER TOP CONTROL MODULE VERIFICATION TEST. Power Top Verification Test
NO: Go To 2

2. Power Top Switch Circuit Short To (B+)




With the ignition off.
Disconnect the Power Top Control Module C1 harness connector.

NOTE: Check connectors - Clean/repair as necessary.

Turn the ignition on.
Measure the voltage between ground and the Power Top Switch circuit.

Q: Is the voltage above 1.0 volts?

YES: Repair the Power Top Switch circuit for a short to (B+). Perform POWER TOP CONTROL MODULE VERIFICATION TEST. Power Top Verification Test
NO: Replace the Power Top Control Module. Perform POWER TOP CONTROL MODULE VERIFICATION TEST. Power Top Verification Test