No Response From OCM (Occupant Classification Module)

NO RESPONSE FROM OCM (OCCUPANT CLASSIFICATION MODULE)












1. TEST FOR INTERMITTENT CONDITION

NOTE: Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.

1. Turn the ignition on.

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

2. 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. (Z913) GROUND CIRCUIT OPEN




1. Disconnect the Occupant Classification Module harness connectors.
2. Using a 12-volt test light connected to 12-volts, check the (Z913) ground circuit.

Does the test light illuminate brightly?

Yes

- Go To 3

No

- Repair the (Z913) ground circuit for an open.
- Perform the AIRBAG SYSTEM VERIFICATION TEST. Airbag System Verification Test

3. (A27) FUSED B+ CIRCUIT OPEN OR SHORTED




1. Using a 12-volt test light connected to ground, check the (A27) Fused B+ circuit.

Does the test light illuminate brightly?

Yes

- Go To 4

No

- Repair the (A27) Fused B+ circuit for an open or short.
- Perform the AIRBAG SYSTEM VERIFICATION TEST. Airbag System Verification Test

4. (D65) CAN C BUS (+) CIRCUIT OPEN




1. Turn the ignition off.
2. Disconnect the TIPM C1 harness connector.
3. Measure the resistance of the (D65) CAN C Bus (+) circuit between the TIPM C1 harness connector and the Occupant Classification Module connector.

Is resistance below 5.0 ohms?

Yes

- Go To 5

No

- Repair the (D65) CAN C Bus (+) circuit for an open.
- Perform the AIRBAG SYSTEM VERIFICATION TEST. Airbag System Verification Test

5. (D64) CAN C BUS (-) CIRCUIT OPEN




1. Measure the resistance of the (D64) CAN C Bus (-) circuit between the TIPM C1 harness connector and the Occupant Classification Module connector.

Is resistance below 5.0 ohms?

Yes

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

No

- Repair the (D64) CAN C Bus (-) circuit for an open.
- Perform the AIRBAG SYSTEM VERIFICATION TEST. Airbag System Verification Test