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B012C-64






B012C-64-PASSENGER EARLY CRASH SIGNAL SENSOR - SIGNAL PLAUSIBILITY FAILURE





For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The front right impact sensor (early crash sensor) is mounted in the engine compartment behind the front lamp unit. Restraints - Description. The front impact sensor is directly hard wired to the Occupant Restraint Controller (ORC) Module. The impact sensors perform their own self test using power supplied by the Occupant Restraint Controller (ORC) then communicate this status back to the ORC with periodic updates. The repair of this fault condition involves verifying the integrity of the wiring between the ORC and the sensor. If the scan tool shows this DTC has a Stored history of setting then the sensor is to be replaced.

- When Monitored:
The Occupant Restraint Controller (ORC) continuously communicates with the Front Right Impact Sensor over the sensor signal circuit. The sensor communication and on board diagnostics are powered by the ORC signal.

- Set Condition:
This code will set, if the ORC and the Passenger Early Crash Sensor do not establish and maintain valid data communications. The DTC will become Active after the fault has set for a minimum of 100 milliseconds (ms). The DTC will go to Stored after the ORC to Passenger Early Crash Sensor communication fault has been removed or the suspect impact sensor has been replaced. This fault will clear upon the next ignition cycle. The Multifunction Indicator Lamp (MIL) will set in the instrument cluster.





1. VERIFY B012C-64-PASSENGER EARLY CRASH SIGNAL SENSOR - SIGNAL PLAUSIBILITY FAILURE IS ACTIVE

WARNING: Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

NOTE: Using the wiring diagram/schematic as a guide check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.

NOTE: If after the harness inspection it appears the impact sensor connector is only seated halfway. Reseat the harness connector into the impact sensor and lock the tab.

WARNING: Turn the ignition on, then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

NOTE: Make sure the battery is fully charged.

1. Turn the ignition on.
2. With the scan tool, read ORC DTCs.

Does the scan tool display active: B012C-64-PASSENGER EARLY CRASH SIGNAL SENSOR - SIGNAL PLAUSIBILITY FAILURE?

Yes

- Go To 2

No

- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. Restraints System Intermittent Condition Test.

2. CHECK THE (R80) AND (R82) FRONT RIGHT IMPACT SENSOR CIRCUITS FOR A SHORT TO BATTERY





WARNING: Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

1. Disconnect the Front Right Impact Sensor harness connector.
2. Disconnect the ORC harness connectors.
3. Connect the SRS Load Tool Adapter 8443-25 to the ORC harness connector.

WARNING: Turn the ignition on, then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

4. Measure the voltage of the (R80) Front Right Impact Sensor Signal circuit and the (R82) Sensor Ground circuit at the Front Right Impact Sensor harness connector.

Is there any voltage present?

Yes

- Repair the (R80) and (R82) Front Right Impact Sensor circuits for a short to battery.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

No

- Go To 3

3. CHECK THE (R80) AND (R82) FRONT RIGHT IMPACT SENSOR CIRCUITS FOR A SHORT TO GROUND





WARNING: Turn the ignition on, then reconnect the battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

1. Measure the resistance between ground and the (R80) and (R82) Front Right Impact Sensor circuits at the Front Right Impact Sensor harness connector.

Is the resistance below 100K Ohms?

Yes

- Repair the (R80) and (R82) Front Right Impact Sensor circuits for a short to ground.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

No

- Go To 4

4. CHECK THE (R80) AND (R82) FRONT RIGHT IMPACT SENSOR CIRCUITS FOR A SHORT TOGETHER




1. Measure the resistance between the (R80) Front Right Impact Sensor Signal circuit and the (R82) Sensor Ground circuit at the Front Right Impact Sensor harness connector.

Is the resistance below 100K Ohms?

Yes

- Repair the (R80) and (R82) Front Right Impact Sensor circuits shorted together.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

No

- Go To 5

5. CHECK THE (R82) FRONT RIGHT IMPACT SENSOR GROUND CIRCUIT FOR AN OPEN OR HIGH RESISTANCE




1. Measure the resistance of the (R82) Front Right Impact Sensor Ground circuit between the Front Right Impact Sensor harness connector and the SRS Load Tool Adapter 8443-25.

Is the resistance below 1 Ohm?

Yes

- Go To 6

No

- Repair the (R82) Front Right Impact Sensor Ground circuit for an open or high resistance.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

6. CHECK THE (R80) FRONT RIGHT IMPACT SENSOR SIGNAL CIRCUIT FOR AN OPEN OR HIGH RESISTANCE




1. Measure the resistance of the (R80) Front Right Impact Sensor Signal circuit between the Front Right Impact Sensor harness connector and the SRS Load Tool Adapter 8443-25.

Is the resistance below 1 Ohm?

Yes

- Go To 7

No

- Repair the (R80) Front Right Impact Sensor Signal circuit for an open or high resistance.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

7. CHECK OPERATION OF THE FRONT RIGHT IMPACT SENSOR
1. Replace the Front Right Impact Sensor. Front.
2. Reconnect the vehicle body harness to the impact sensor.
3. Remove any special tools or jumper wires and reconnect all previously disconnected components - except the Battery.

WARNING: Turn the ignition on, then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

4. Connect the scan tool to the Data Link Connector - use the most current software available.
5. Use the scan tool and erase the stored codes in all airbag system modules.
6. Turn the Ignition Off, and wait 15 seconds before turning the Ignition On.
7. Wait one minute, and read active codes and if there are none present read the stored codes.

Did the active Front Right Impact Sensor DTC return?

Yes

- Go To 8

No

- Repair is complete.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

8. REPLACE THE OCCUPANT RESTRAINT CONTROLLER

WARNING: Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

WARNING: If the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Failure to take the proper precautions can result in accidental airbag deployment. Failure to follow these instructions may result in possible serious or fatal injury.

If there are no possible causes remaining, view repair.

Repair

- Replace the Occupant Restraint Controller. Occupant Restraint Controller - Removal.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

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