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Diagnostic Procedure

WARNING: This page is about a different car, the 2004 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
NO RESPONSE FROM AIRBAG CONTROL MODULE - DIAGNOSTIC PROCEDURE

TEST ACTION
1 Ensure that the battery is fully charged.
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BEFORE PROCEEDING.

Disconnect the ACM harness connector.
Connect the appropriate Load Tool ACM Adapter to the ACM connector.
Turn the ignition on and then reconnect the Battery.
Using a 12-volt test light connected to ground, probe the Fused Ignition Switch Output (Run) Circuit and the Fused Ignition Switch Output (Run/Start) Circuit at the ACM connector.
NOTE: One open circuit will not cause a NO RESPONSE condition.

Is the test light illuminated on both circuits?
  1. Yes --> Go To 2
  2. No --> Repair the Fused Ignition Switch Output (Run) and Fused Ignition Switch Output (Run/Start) circuits for an open.

    Perform AIRBAG VERIFICATION TEST - VER 1  .

NOTE: When reconnecting airbag system components, the ignition must be turned off and the battery must be disconnected.
2
WARNING: To avoid personal injury or death, turn the ignition off, disconnect the Battery and wait 2 minutes before proceeding.
Disconnect the Airbag Control Module harness connector.Connect the appropriate Load Tool ACM Adapter to the ACM connector.Using a 12-volt test light connected to 12-volts, probe the ground circuit.
NOTE: Make sure test light is connected to the Battery positive terminal.
Is the test light illuminated?
  1. Yes --> Go To 3
  2. No --> Repair the ground circuit for an open.

    Perform AIRBAG VERIFICATION TEST - VER 1  .

NOTE: When reconnecting Airbag system components, the ignition must be turned off and the battery must be disconnected.
3
NOTE: Ensure there is PCI Bus communication with other modules on the vehicle before proceeding. If not, refer to the symptom list from the menu and repair as necessary.
Turn the ignition off and wait 2 minutes before proceeding.Disconnect the Airbag Control Module harness connector.Connect the appropriate Load Tool ACM Adapter to the ACM connector.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(R) 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. 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.Turn the ignition on.Observe the voltage display on the DRB Lab Scope.Does the voltage pulse from 0 to approximately 7.5 volts?
  1. Yes --> Go To 4
  2. No --> Repair the PCI Bus circuit for an open.

    Perform AIRBAG VERIFICATION TEST - VER 1  .

NOTE: When reconnecting Airbag system components, the ignition must be turned off and the battery must be disconnected.
4 If there are no possible causes remaining, view repair.
  1. Repair
    1. Replace the Airbag Control Module (ACM) in accordance with the Service Information.
    2. Perform AIRBAG VERIFICATION TEST - VER 1  .
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