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B0052-11






B0052-11-PASSENGER SEATBELT SENSOR - CIRCUIT SHORT TO GROUND

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





Theory of Operation

When powered, the Occupant Restraint Controller (ORC) sends a test current across the Passenger Seat Belt Buckle Switch circuits to verify the integrity of the switch and wiring. The front seat belt switches cannot be adjusted or repaired and, if ineffective or damaged, the entire front seat belt buckle-half unit must be replaced. The seatbelt reminder lamp will display in the instrument cluster for this fault. The ORC obtains the buckle switch status of the driver and front passenger, as well as the status of the front passenger seat occupant detection mat. If the driver or front passenger is unbelted, the ORC sends a message to the IPC over the CAN-B bus to turn on the seatbelt reminder light. The light remains on until the front seatbelts are fastened. An audible alert triggers within 60 seconds of vehicle speed over 5 mph. The seatbelt reminder light remains illuminated until the front belts are fastened. The seatbelt buckle switch consists of a Hall-effect sensor assembly. The ORC determines the status of the seatbelt (buckled/unbuckled) based on the amount of current drawn by the sensor. When the seatbelt is unbuckled, the sensor draws a current of approximately 6.5 mA. When the seat is buckled, the sensor draws a current of approximately 15 mA.

- When Monitored:
While the ignition on and the Occupant Restraint Controller (ORC) is configured for a Driver Seat Belt Switch, the ORC checks the switch input current ranges. The ORC monitors the switch input current ranges at power up and continuously every 100ms.

- Set Condition:
The ORC monitors the status of the seat belt switch circuits at power up and every 60 ms thereafter while the ignition is in on.

This DTC sets when the ORC detects the seat belt switch circuits have become shorted to ground for more than 2.5 seconds. This DTC transitions from active to stored when the module sees a recovery from the shorted to ground condition for greater than five seconds.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Restraints System Pre-Diagnostic Procedure.

Diagnostic Test

1. VERIFY ACTIVE DTC

NOTE: Make sure the battery is fully charged.

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

Does the scan tool display active B0052-11-PASSENGER SEATBELT SENSOR - CIRCUIT SHORT TO GROUND DTC?

Yes

- Go To 2

No

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

2. CHECK PASSENGER SEAT BELT BUCKLE SWITCH CIRCUITS FOR A SHORT TO GROUND

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 Passenger Seat Belt Buckle Switch harness connector.

NOTE: Check connectors - Clean and repair as necessary.

2. Measure the resistance of the (R58) Passenger Seat Belt Buckle Switch Sense circuit between terminal 1 of the Passenger Seat Belt Buckle Switch harness connector and ground.
3. Measure the resistance of the (R284) First Row Passenger Seat Sensors Common Return circuit between terminal 2 of the Passenger Seat Belt Switch harness connector and ground.

Is the resistance below 10k Ohms on any of these circuits?

Yes

- Repair the (R58) or (R284) Passenger Seat Belt Buckle Switch circuits for a short to ground.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

No

- Go To 3

3. CHECK (R58) PASSENGER SEAT BELT SWITCH SENSE CIRCUIT FOR A SHORT TO THE (R730) FIRST ROW PASSENGER SEAT SENSORS COMMON RETURN CIRCUIT
1. Measure the resistance between the (R58) Passenger Seat Belt Buckle Switch Sense circuit connector and (R284) First Row Driver Seat Sensors Common Return circuit at the appropriate terminals of the Driver Seat Belt Buckle Switch harness connector.

Is the resistance below 5k Ohms?

Yes

NOTE: NOTE:If the short is found in the Seat Harness, do not attempt to repair the Seat Harness. Replace the Seat Harness.

- Repair the (R58) Passenger Seat Belt Buckle Switch Sense circuit for a short to the (R284) First Row Passenger Seat Sensors Common Return circuit.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

No

- Go To 4

4. CHECK OPERATION OF THE PASSENGER SEAT BELT BUCKLE SWITCH
1. Replace the Passenger Seat Belt Buckle Switch. Seat Belt Buckle - Removal.
2. Reconnect the vehicle body harness connector to the Passenger Seat Belt Buckle Switch.
3. Remove any special tools or jumper wires and reconnect all previously disconnected components - except the Battery.
4. If equipped with the standard key ignition, use this ignition on warning.

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.

5. If equipped with the keyless ignition, use this ignition on warning.

WARNING:
Disconnect the 12-volt battery wait two minutes before proceeding, remove the ORC fuses, connect the 12-volt battery, wait two minutes before proceeding. Cycle the ignition to the On position, then reconnect the ORC fuses. Wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

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

Does the scan tool display active B0052-11-PASSENGER SEATBELT SENSOR - CIRCUIT SHORT TO GROUND DTC?

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.

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.

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

No

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

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