Chrysler Concorde 2004 Service Manual page 158

COMMUNICATION
*NO RESPONSE FROM ACM —
TEST
3 Note: Ensure there is PCI bus communication with other modules. If not,
refer to the PCI Bus Communication Failure symptom and repair as
necessary.
WARNING: TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND
WAIT TWO MINUTES BEFORE PROCEEDING.
Disconnect the Airbag Control Module harness connector.
Connect the appropriate Load Tool ACM Adapter to the ACM connector.
Turn the ignition on and then reconnect the Battery.
Use Scope input cable CH7058, Cable to Probe adapter CH7062, and the red and
black test probes.
Connect the scope input cable to the channel one connector on the DRB. Attach the
red and black leads and the cable to probe adapter to the scope input cable.
With the DRBIII select Pep Module Tools.
Select lab scope.
Select Live Data.
Select 12 volt square wave.
Press F2 for Scope.
Press F2 and use the down arrow to set voltage range to 20 volts. Set Probe to x10.
Press F2 again when complete.
Connect the Black lead to the chassis ground. Connect the Red lead to the PCI Bus
circuit in the ACM connector.
Observe the voltage display on the DRB Lab Scope.
Does the voltage pulse from 0 to approximately 7.5 volts?
Yes → Replace the Airbag Control Module in accordance with the service
No
4 WARNING: TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND
WAIT TWO MINUTES BEFORE PROCEEDING.
Disconnect the Airbag Control Module harness connector.
Connect the appropriate Load Tool ACM Adapter to the ACM connector.
Disconnect the BCM C1 harness connector.
Measure the resistance of the PCI bus circuit between the ACM connector and the
BCM C1 connector.
Is the resistance below 5.0 ohms?
Yes → Replace the Body Control Module in accordance with the service
No
ACTION
information. WARNING: Make sure the battery is disconnected
and wait 2 minutes before proceeding.
Perform AIRBAG VERIFICATION TEST - VER 1.
→ Go To 4
information.
Perform AIRBAG VERIFICATION TEST - VER 1.
→ Repair the PCI Bus circuit for an open.
Perform AIRBAG VERIFICATION TEST - VER 1.
Continued
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APPLICABILITY
All
All