B1B55-1 ST ROW PASSENGER SEAT BELT SENSOR CIRCUIT HIGH
For a complete wiring diagram Refer to Section 8W.
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When Monitored:
With the ignition on and the Occupant Restraint Controller (ORC) ignition voltage above 6.6 volts, the ORC performs a series of passive and active current tests on the Passenger Seat Belt Switch circuits.
The passive and active tests are repeated every 1.26 seconds.
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Set Condition:
If the ORC active tests identifies a high voltage condition in the Passenger Seat Belt Switch circuits the B1B55-1st Row Passenger Seat Belt Sensor Circuit Shorted High DTC will become active.
If the ORC passive tests identifies a high voltage condition in the Passenger Seat Belt Switch circuits the B1B57-1st Row Passenger Seat Belt Sensor Circuit Shorted Together DTC will become active.
Both DTCs can be active at the same time and have the same possible causes.
Possible Causes
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(R58) PASSENGER SEAT BELT SWITCH SIGNAL CIRCUIT SHORT TO BATTERY
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(R60) PASSENGER SEAT BELT SWITCH GROUND CIRCUIT SHORT TO BATTERY
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(R58) PASSENGER SEAT BELT SWITCH SIGNAL CIRCUIT AND (R60) PASSENGER SEAT BELT SWITCH GROUND CIRCUIT SHORTED TOGETHER
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PASSENGER SEAT BELT SWITCH OPEN
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OCCUPANT RESTRAINT CONTROLLER (ORC)
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Diagnostic Test
1.
VERIFY THAT DTC B1B55-1 ST ROW PASSENGER SEAT BELT SENSOR CIRCUIT HIGH IS ACTIVE
NOTE:
Ensure the battery is fully charged.
Turn the ignition on.
With the scan tool, read ORC DTC.
Does the scan tool display active DTC: B1B55-1ST ROW PASSENGER SEAT BELT SENSOR CIRCUIT HIGH?
Yes
No
2.
CHECK FOR HIGH VOLTAGE ON THE PASSENGER SEAT BELT SWITCH CIRCUITS
Turn the ignition off.
Disconnect the Passenger Seat Belt Switch connector.
NOTE:
Check connectors – Clean and repair as necessary.
Turn the ignition on.
Measure the voltage of the (R58) Passenger Seat Belt Switch Signal circuit between cavity 1 in the Passenger Seat Belt Switch connector and ground.
Measure the voltage of the (R60) Passenger Seat Belt Switch ground circuit between cavity 2 in the Passenger Seat Belt Switch connector and ground.
Is the voltage above 5 volts on either circuit?
Yes
No
3.
CHECK FOR ORC PASSENGER SEAT BELT SWITCH CIRCUITS SHORTED TOGETHER
Turn the ignition off.
Measure the resistance between the (R58) Passenger Seat Belt Switch Signal circuit cavity 1 and (R60) Passenger Seat Belt Switch ground circuit cavity 2 in the Passenger Seat Belt Switch connector.
Is the resistance below 10.0 Ohms?
Yes
No
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Repair the shorted Passenger Seat Belt Switch in accordance with the service information.
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Perform the *AIRBAG SYSTEM VERIFICATION TEST - VER 1.
4.
CHECK FOR PASSENGER HALL EFFECT CIRCUITS SHORTED TOGETHER
WARNING:
To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
Disconnect the both ORC connectors.
NOTE:
Check connectors – Clean and repair as necessary.
Connect the 8443-32 ORC Adaptor to the ORC connectors.
Measure the resistance between the (R58) Passenger Seat Belt Switch signal circuit cavity 1 and (R60) Passenger Seat Belt Switch Ground circuit cavity 2 in the Passenger Seat Belt Switch Connector.
Is the resistance below 5 ohms?
Yes
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Repair the (R58) Passenger Seat Belt Switch Signal circuit shorted to the (R60) Passenger Seat Belt Switch Ground circuit in accordance with the service information.
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Perform the *AIRBAG SYSTEM VERIFICATION TEST - VER 1.
No
5.
CHECK FOR A PASSENGER SEAT BELT SWITCH CIRCUITS SHORTED TO BATTERY
Disconnect the both ORC connectors.
NOTE:
Check connectors – Clean and repair as necessary.
Connect the 8443-32 ORC Adaptor to the ORC connectors.
WARNING:
To avoid serious or fatal injury, turn the ignition on, then reconnect the battery.
Measure the voltage of the (R58) Passenger Seat Belt Switch Signal circuit from cavity 1 of the Passenger Seat Belt Switch connector to ground.
Measure the voltage of the (R60) Passenger Seat Belt Switch Ground circuit from cavity 2 of the Passenger Seat Belt Switch connector to ground.
Is there any voltage on either circuit?
Yes
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Repair the shorted to battery (R58) Passenger Seat Belt Switch Signal circuit or (R60) Passenger Seat Belt Switch Ground circuit in accordance with the service
information.
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Perform the *AIRBAG SYSTEM VERIFICATION TEST - VER 1.
No
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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
and serious or fatal injury.
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WARNING:
To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
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Replace the ORC in accordance with the service information.
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Perform the *AIRBAG SYSTEM VERIFICATION TEST - VER 1.
6.
TEST FOR INTERMITTENT CONDITION
With the scan tool, record and erase all DTC from all Airbag modules.
If any ACTIVE codes are present they must be resolved before diagnosing any stored codes.
WARNING:
To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.
The following additional checks may assist you in identifying a possible intermittent problem.
Reconnect any disconnected components and harness connector.
WARNING:
To avoid serious or fatal injury, turn the ignition on, then reconnect the battery.
With the scan tool, monitor active codes as you work through the following steps.
WARNING:
To avoid serious or fatal injury, maintain a safe distance from all airbags while performing the following steps.
Wiggle the wiring harness and connectors of the related airbag circuit or component.
If only stored codes return, continue the test until the problem area has been isolated.
In the previous steps you have attempted to recreate the conditions responsible for setting the active DTC in question.
Does the scan tool display any ACTIVE DTC?
Yes
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Select the appropriate diagnostic procedure from the Table of Contents in this section.
No
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No problem found at this time. Erase all codes before returning vehicle to customer.