B1B70

B1B70-UP-FRONT LEFT SATELLITE ACCELERATION SENSOR INTERNAL







Theory of Operation

Each front sensor is secured with a screw to the backs of the right and left vertical members of the radiator support within the engine compartment. Impact sensors perform their own self test using power supplied by the Occupant Restraint Controller (ORC) then communicate this status back to the module. The repair of this fault centers on verifying the integrity of the sensor's internal circuitry and software validity. If the scan tool shows this DTC has a Stored history of setting then the front left impact sensor is to be replaced.

- When Monitored:
With the ignition on, the Front Left Impact Sensor is equipped with on board diagnostics to monitor the sensor's internal circuits. If a problem is identified, the sensor sends the Front Left Impact Sensor Internal message to the Occupant Restraint Controller (ORC).

- Set Condition:
This DTC will set if the ORC receives an internal DTC from the Front Left Impact Sensor.





1.

NOTE: If the scan tool shows this DTC has a Stored history of setting then the front left impact sensor is to be replaced.
DETERMINE ACTIVE OR STORED FAULT CODE

NOTE: Make sure the battery is fully charged.

1. Turn the ignition on.
2. Wait one minute, and read active codes.

Is the DTC: B1B70-UP-FRONT LEFT SATELLITE ACCELERATION SENSOR INTERNAL active or shows a setting history in Stored?

Yes

- 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: Inspect the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.

- Go To 2

No (Did not set a active or stored DTC B1B70-UP-FRONT LEFT SATELLITE ACCELERATION SENSOR INTERNAL).

- Perform the AIRBAG SYSTEM INTERMITTENT TEST. Initial Inspection and Diagnostic Overview.

2. VERIFY OPERATION OF THE FRONT LEFT IMPACT SENSOR

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. Replace the Front Left Impact Sensor.
2. Reconnect the vehicle wire harness to the 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. Use the scan tool and erase the stored codes in all airbag system modules.
5. Turn the Ignition Off, and wait 15 seconds before turning the Ignition On.
6. Wait one minute, and read active codes.

Did the active DTC: B1B70-UP-FRONT LEFT SATELLITE ACCELERATION SENSOR INTERNAL return?

Yes

- Go To 3

No

- Repair is complete.
- Perform the AIRBAG SYSTEM VERIFICATION TEST. Airbag System Verification Test.

3. 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 follow these instructions may result in possible serious or fatal injury.

If all possible causes are done. View repair.

Repair

- Replace the ORC.
- Perform the AIRBAG SYSTEM VERIFICATION TEST. Airbag System Verification Test.