B1B54-PASSENGER SEAT BELT SENSOR CIRCUIT LOW
B1B54-PASSENGER SEAT BELT SENSOR CIRCUIT LOW
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For a complete wiring diagram, refer to the Wiring Information.
Theory of Operation
When powered, the Occupant Restraint Controller (ORC) sends a test current to the belt switches to verify the integrity of the switch and wiring. The use of the ORC connector adapter tool in the tests below provides a test point in place of the module.
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When Monitored:
The ORC monitors the status of the seat belt switch circuits at power up and every 100 ms thereafter while the ignition is in on.
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Set Condition:
This DTC sets when the ORC detects the seat belt switch circuits have become shorted to ground for more than 3.0 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.
Possible Causes |
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| (R58) PASSENGER SEAT BELT SWITCH SIGNAL CIRCUIT SHORTED TO GROUND |
| OCCUPANT RESTRAINT CONTROLLER (ORC) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure).
| 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 B1B54-PASSENGER SEAT BELT SENSOR CIRCUIT LOW DTC?
Yes
- Go To 2
No
- Perform the AIRBAG SYSTEM INTERMITTENT TEST. (Refer to 28 - DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure).
2. CHECK THE (R58) PASSENGER SEAT BELT SWITCH SIGNAL CIRCUIT FOR A SHORT TO GROUND
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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:
| 1. | Disconnect the Passenger Seat Belt Switch harness connector. |
| 2. | Disconnect the ORC harness connectors. |
| NOTE: | Check harness connectors - Clean and repair as necessary. |
| 3. | Connect the SRS Load Tool Adapter 8443-32-R or the 8443-32-L to the ORC harness connectors. |
| 4. | Measure the resistance of the (R58) Passenger Seat Belt Switch Signal circuit between the appropriate terminal of the SRS Load Tool Adapter and ground. |
Is the resistance below 10.0 Ohms?
Yes
- Repair or replace the (R58) Passenger Seat Belt Switch Signal circuit for a short to ground.
- Perform the AIRBAG SYSTEM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure).
No
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Go To 3
3. CHECK OPERATION OF THE 1st ROW PASSENGER SEAT BELT SWITCH
| 1. | Replace the Passenger Seat Belt Switch in accordance with the Service Information. |
| 2. | Disconnect the SRS Load Tool Adapter 8443-32-R or 8443-32-L . |
| 3. | Reconnect the ORC harness connectors. |
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.
WARNING:
| 4. | With the scan tool, read all active ORC DTCs. |
Does the scan tool display active B1B54-1ST ROW PASSENGER SEAT BELT SENSOR CIRCUIT LOW DTC?
Yes
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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.
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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 ORC in accordance with the Service Information.
- Perform the AIRBAG SYSTEM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure).
No
- The repair is complete.
- Perform the AIRBAG SYSTEM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure).