Diagnostic Procedure
WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURE - *NO RESPONSE FROM OCCUPANT CLASSIFICATION MODULE
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 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 Occupant Classification Module 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 circuit. Is the test light illuminated? Yes --> Go To 2 No --> Repair the Fused Ignition Switch Output 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.
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| 2 | 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 Occupant Classification Module harness 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? Yes --> Go To 3 No --> Repair the Ground circuit for an open. Perform AIRBAG VERIFICATION TEST - VER 1 . When reconnecting Airbag system components, the ignition must be turned off and the battery must be disconnected. |
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| 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:
TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BEFORE PROCEEDING. Disconnect the Occupant Classification Module 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 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. Press F2 again when complete.Connect the Black lead to the chassis ground. Connect the Red lead to the PCI Bus circuit.Observe the voltage display on the DRBIII® Lab Scope.Does the voltage pulse from 0 to approximately 7.5 volts?Yes --> Replace the Occupant Classification Module in accordance with the Service information.Perform AIRBAG VERIFICATION TEST - VER 1 .No --> Repair the PCI Bus circuit for an open.Perform AIRBAG VERIFICATION TEST - VER 1 . |
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