B1BB3
B1BB3-PASSENGER AIRBAG DISABLE SWITCH CIRCUIT LOW
For a complete wiring diagram, refer to the Wiring Information Electrical Diagrams.
- When Monitored:
When the ignition is on, the (R106) Passenger Airbag MUX Switch Sense circuit supplies a 3 to 10 ms pulse every 100 ms across the On or Off switch resistor to the (R104) Passenger Airbag MUX switch return circuit.
- Set Condition:
The code will set if the Occupant Restraint Controller (ORC) senses low resistance on the (R106) Passenger Airbag MUX Switch Sense circuit.
1. DETERMINE ACTIVE OR STORED DTC
1. Turn the ignition on.
NOTE: Make sure that the battery is fully charged.
SELECT ACTIVE or STORED DTC:
ORC - ACTIVE DTC
- Go To 2
ORC - STORED DTC
- Go To 7
2. CHECKING EQUIPMENT
Is this vehicle equipped with a Passenger Airbag On - Off Switch?
Yes
- Go To 3
No
- With the scan tool in MISCELLANEOUS re-configure the ORC for NO AIRBAG ON/OFF SWITCH.
- Perform the ORC VERIFICATION TEST. Occupant Restraint Controller (ORC) Verification Test.
3. PAB ON/OFF SWITCH SHORTED
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 Airbag On - Off Switch.
NOTE: Check connectors - Clean and repair as necessary.
2. Measure the PAB On/Off Switch resistance between terminals 1 and 3.
3. Measure the PAB On/Off Switch resistance between terminals 2 and 3.
Is the resistance below 10K Ohms on either test?
Yes
- Replace the Passenger Airbag ON/OFF Switch.
- Perform the ORC VERIFICATION TEST. Occupant Restraint Controller (ORC) Verification Test.
No
- Go To 4
4. PAB ON/OFF SWITCH SHORTED
1. Measure the PAB On/Off Switch resistance between terminals 1 and 2 in both switch positions.
2. The switch resistance specifications are: ON position 175.0 to 190.0 Ohms and OFF position 820.0 870.0 Ohms.
Is the resistance within the range specified for both switch positions?
Yes
- Go To 5
No
- Replace the Passenger Airbag ON/OFF Switch.
- Perform the ORC VERIFICATION TEST. Occupant Restraint Controller (ORC) Verification Test.
5. (R106) PAB MUX SWITCH SENSE CIRCUIT SHORTED TO GROUND
1. Disconnect the Occupant Restraint Controller connectors.
NOTE: Check connectors - Clean and repair as necessary.
2. Connect the Load Tool ORC Adaptor 8443-25 to the Occupant Restraint Controller connector.
3. Measure the resistance of the (R106) Passenger Airbag MUX Switch Sense circuit between ORC Adaptor 8443-25 and ground.
Is the resistance below 10K Ohms?
Yes
- Repair the (R106) Passenger Airbag MUX Switch Sense circuit for a short to ground.
- Perform the ORC VERIFICATION TEST. Occupant Restraint Controller (ORC) Verification Test.
No
- Go To 6
6. ORC, PAB ON/OFF SWITCH CIRCUIT SHORTED TO GROUND
Repair
- 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 Restraint Controller (ORC).
- Perform the ORC VERIFICATION TEST. Occupant Restraint Controller (ORC) Verification Test.
7. CHECKING STORED OR INTERMITTENT CODES
1. With the scan tool, record and erase all DTC from all Airbag modules.
2. If equipped with Passenger Airbag On - Off switch, read the DTC in all switch positions.
3. If any ACTIVE codes are present they must be resolved before diagnosing any stored codes.
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.
4. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
5. Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.
6. The following additional checks may assist you in identifying a possible intermittent problem.
7. Reconnect any disconnected components and harness connector.
WARNING: Turn the ignition on, then reconnect the 12-volt battery. Wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
8. With the scan tool, monitor active codes as you work through the following steps.
WARNING: Maintain a safe distance from all airbags while performing the following steps. Failure to follow these instructions may result in possible serious or fatal injury.
9. Wiggle the wiring harness and connectors of the related airbag circuit or component.
10. If codes are related to the Driver Airbag circuits, rotate the steering wheel from stop to stop.
11. If only stored codes return continue the test until the problem area has been isolated.
12. In the previous steps you have attempted to recreate the conditions responsible for setting active DTC in question.
Are any ACTIVE DTC present?
Yes
- Perform the appropriate diagnostic procedure. Testing and Inspection.
No
- No problem found at this time. Erase all codes before returning vehicle to customer.