No Response From OCM (Occupant Classification Module)

*NO RESPONSE FROM OCM (OCCUPANT CLASSIFICATION MODULE)





For a complete wiring diagram refer to Diagrams/Electrical.





Diagnostic Test

1. TEST FOR INTERMITTENT CONDITION

Turn the ignition on.

NOTE: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.

With the scan tool, select ECU view.

NOTE: A red X will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.

Does the scan tool display a red X next to the module?

Yes

- Go To 2

No

- The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.

2. (F201) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN





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.

WARNING: To avoid personal injury or death, turn the ignition on, then reconnect the battery.

Using a 12-volt test light connected to ground, probe the (F201) Fused Ignition Switch Output circuit.

Does the test light illuminate brightly?

Yes

- Go To 3

No

- Repair the (F201) Fused Ignition Switch Output circuit for an open.
- Perform the AIRBAG VERIFICATION TEST - VER 1. Airbag System Verification Test

3. (Z105) GROUND CIRCUIT OPEN





Turn the ignition off.

Using a 12-volt test light connected to 12-volts, probe the (Z105) ground circuit.

Does the test light illuminate brightly?

Yes

- Go To 4

No

- Repair the (Z105) Ground circuit for an open.
- Perform the AIRBAG VERIFICATION TEST - VER 1. Airbag System Verification Test

4. (D25) PCI BUS CIRCUIT OPEN





Disconnect the scan tool from the DLC connector.

Measure the resistance of the (D25) PCI Bus circuit between the DLC and the Occupant Classification Module connector.

Is the resistance below 5.0 ohms?

Yes

- Replace the Occupant Classification Module.
- Perform the AIRBAG VERIFICATION TEST - VER 1. Airbag System Verification Test

No

- Repair the (D25) PCI Bus circuit for an open.
- Perform the AIRBAG VERIFICATION TEST - VER 1. Airbag System Verification Test