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No Response From ACM

Possible Causes:

Testing

    WARNING: Turn the ignition off disconnect the battery and wait 2 minutes before proceeding.
    NOTE: When reconnecting the airbag system components, the ignition must be turned off and the battery must be disconnected.
    NOTE: One open circuit will not cause a NO RESPONSE condition.
  1. Ensure that the battery is fully charged. Disconnect the ACM C1 harness 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. Is the test light illuminated on both circuits? If yes, go to next step. If no, repair the Fused Ignition Switch Output (Run) and Fused Ignition Switch Output (Run/Start) circuits for an open. Perform AIRBAG VERIFICATION TEST  .
    2. WARNING: Turn the ignition off, disconnect the battery and wait 2 minutes before proceeding.
  2. Ensure that the battery is fully charged. Disconnect the ACM C1 harness connector. Using a 12-volt test light connected to 12-volts. probe the ground circuit. Is the test light illuminated? If yes, go to next step. If no, repair the Ground circuit for an open. Perform AIRBAG VERIFICATION TEST  . When reconnecting Airbag system components, the ignition must be turned off and the battery must be disconnected.
    3. WARNING: Turn the ignition off, disconnect the battery and wait 2 minutes before proceeding.
    NOTE: Ensure there is PCI Bus communication with other modules on the vehicle before proceeding. If not, diagnose and repair Communication problem as necessary. See COMMUNICATIONS in DIAGNOSTIC TROUBLE CODE IDENTIFICATION  and SYMPTOM IDENTIFICATION  tables.
  3. Disconnect the ACM CI harness 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 DRBIII(R) . 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. 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 DRBIII(R) Lab Scope. Does the voltage pulse from 0 to approximately 7.5 volts? If yes, replace the Airbag Control Module (ACM). See AIR BAG CONTROL MODULE (ACM)  . Perform AIRBAG VERIFICATION TEST  . If no, repair the PCI Bus circuit for an open. Perform AIRBAG VERIFICATION TEST  .
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