Chrysler 2005 Crossfire SRT6 Service Manual page 3592

23 - 44 CONVERTIBLE TOP
9076 NO COMMUNICATION WITH BODY CONTROL MODULE (BCM) (CONTINUED)
• When Monitored: Continuous with the ignition on.
• Set Condition: CAN Bus communication failure between the Body Control Module (BCM) and the
Power Top Control Module (PTCM).
OPEN CAN B BUS (+) CIRCUIT
OPEN CAN B BUS (-) CIRCUIT
POWER TOP CONTROL MODULE
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.
Diagnostic Test
1.
Open CAN B Bus (+) circuit
Turn the ignition off.
Disconnect the Power Top Control Module (PTCM) C1 harness con-
nector.
Disconnect the BCM harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the CAN B Bus (+) circuit from the PTCM
C1 harness connector to the BCM harness connector.
Is the resistance below 5.0 ohm?
Yes >> Go To 2
No >> Repair the PTCM CAN B Bus (+) circuit for an open.
Perform POWER TOP CONTROL MODULE VERIFICA-
TION TEST.
2.
Open CAN B Bus (-) circuit
With the ignition off.
Measure the resistance of the CAN B Bus (-) circuit from the PTCM
C1 harness connector to the BCM harness connector.
Is the resistance below 5.0 ohm?
Yes >> Replace the Power Top Control Module.(Refer to 8 -
ELECTRICAL/ELECTRONIC
POWER TOP CONTROL MODULE - REMOVAL)
Perform POWER TOP CONTROL MODULE VERIFICA-
TION TEST.
No >> Repair the PTCM CAN B Bus (-) circuit for an open.
Perform POWER TOP CONTROL MODULE VERIFICA-
TION TEST.
Possible Causes
CONTROL MODULES/
ZH