No Response From ORC

POSSIBLE CAUSES
- Fused ignition switch output circuit open
- ORC ground circuit open
- SCI transmit circuit open
- SCI transmit circuit shorted to ground
- SCI transmit circuit shorted to voltage
- Occupant restraint controller

Diagnostic Test




1. FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN

WARNING: TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BEFORE PROCEEDING.

Turn the ignition off.
Disconnect the Occupant Restraint Controller (ORC) harness connector.

NOTE: Check connector Clean/repair as necessary.

Turn the ignition on.
Measure the voltage of the Fused Ignition Switch Output circuit at the ORC harness connector.

Q: Is the voltage above 10 volts?

YES: Go to 2
NO: Repair the Fused Ignition Switch Output circuit for an open.

WARNING: WHEN RECONNECTING AIRBAG SYSTEM COMPONENTS, THE IGNITION MUST BE TURNED OFF AND THE BATTERY MUST BE DISCONNECTED.
Perform AIRBAG VERIFICATION TEST.




2. ORC GROUND CIRCUIT OPEN

Turn the ignition off.
Measure the resistance of the Ground circuit from the ORC harness connector.

Q: Is the resistance below 5.0 ohms?

YES: Go to 3
NO: Repair the Ground circuit for an open.

WARNING: WHEN RECONNECTING AIRBAG SYSTEM COMPONENTS, THE IGNITION MUST BE TURNED OFF AND THE BATTERY MUST BE DISCONNECTED.
Perform AIRBAG VERIFICATION TEST.




3. SCI TRANSMIT CIRCUIT OPEN

With the ignition off.

Measure the resistance of the SCI Transmit circuit from the ORC harness connector to the DLC.

Q: Is the resistance below 5.0 ohms?

YES: Go to 4
NO: Repair the SCI Transmit circuit for an open.

WARNING: WHEN RECONNECTING AIRBAG SYSTEM COMPONENTS, THE IGNITION MUST BE TURNED OFF AND THE BATTERY MUST BE DISCONNECTED.
Perform AIRBAG VERIFICATION TEST.




4. SCI TRANSMIT CIRCUIT SHORTED TO GROUND

With the ignition off.
Measure the resistance between ground and the SCI Transmit circuit.

Q: Is the resistance below 100 kohms?

YES: Repair the SCI Transmit circuit for a short to ground.

WARNING: WHEN RECONNECTING AIRBAG SYSTEM COMPONENTS, THE IGNITION MUST BE TURNED OFF AND THE BATTERY MUST BE DISCONNECTED.
Perform AIRBAG VERIFICATION TEST.

NO: Go to 5




5. SCI TRANSMIT CIRCUIT SHORTED TO VOLTAGE

Turn the ignition on.
Measure the voltage of the SCI Transmit circuit at the ORC connector.

Q: Is the voltage above 0.5 volt?

YES: Repair the SCI Transmit circuit for a short to voltage.

WARNING: WHEN RECONNECTING AIRBAG SYSTEM COMPONENTS, THE IGNITION MUST BE TURNED OFF AND THE BATTERY MUST BE DISCONNECTED.
Perform AIRBAG VERIFICATION TEST.

NO: Replace the Occupant Restraint Controller.

WARNING:
- IF THE OCCUPANT RESTRAINT CONTROLLER IS DROPPED AT ANY TIME, IT MUST BE REPLACED.
- WHEN RECONNECTING AIRBAG SYSTEM COMPONENTS, THE IGNITION MUST BE TURNED OFF AND THE BATTERY MUST BE DISCONNECTED.
Perform AIRBAG VERIFICATION TEST.