B0105-1B
B0105-1B-FRONT PASSENGER AIRBAG 2ND STAGE - CIRCUIT RESISTANCE ABOVE THRESHOLD
Special Tools:
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 squibs to verify the integrity of the squib and the wiring. These circuits are maintained in a "floating" configuration at the module, (connected to neither power nor ground), as protection against inadvertent deployment. Use of the SRS Load Tool (8443A) in the tests below substitutes a suspect squib with a known good component. The use of the 56 Way ACM Adapter (8443-25)provides a test point, as well as a method for opening the shorting bar connections within the harness connector. The ORC is powered by the Body Control Module (BCM) through a fused controlled circuit. The 24 pin connector side of the 32/24 way ORC Module provides ground.The Front Passenger Airbag is a three stage device with three electrical connectors. The first stage is deployed immediately during impact that requires airbag deployment. The timing of the second stage determines the output force of the airbag. The third stage triggers a tether cutter initiator, which releases the tether when a softer airbag is necessary.
- When Monitored:
With the ignition on.
- Set Condition:
The Occupant Restraint Controller (ORC) monitors the resistance of the Passenger Squib 2 circuits. The ORC will set this DTC if it detects an open or high resistance on the Passenger Squib 2 circuits.
1. DETERMINE ACTIVE OR STORED DTC
NOTE: Make sure that the battery is fully charged.
NOTE: The scan tool, SRS Load Tool (8443A), and DVOM are required to perform the following test.
1. Turn the ignition on.
Select ACTIVE or STORED DTC:
ACTIVE DTC
- Go To 2
STORED DTC
- Go To 5
2. CHECK FOR OPEN SQUIB CIRCUITS IN PASSENGER AIRBAG
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 Squib harness connectors.
WARNING: Do not place an intact non-deployed airbag face down on a hard surface, the airbag propels into the air if accidentally deployed. Failure to follow these instructions may result in possible serious or fatal injury.
NOTE: Check connectors - Clean and repair as necessary.
2. Connect the SRS Load Tool (8443A) and the SRS Load Jumper (8443-8) to the Passenger Airbag Squib harness connectors.
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.
3. With the scan tool, read the active ORC DTCs.
Does the scan tool display: B0105-1B-FRONT PASSENGER AIRBAG 2ND STAGE - CIRCUIT RESISTANCE ABOVE THRESHOLD - DTC?
Yes
- Go To 3
No
- Replace the Passenger Airbag. Passenger Air Bag - Removal.
- Perform the RESTRAINTS SYSTEM VERIFICATION. Restraints System Verification Test.
3. CHECK THE (R64) PASSENGER SQUIB 2 LINE 1 CIRCUIT FOR AN OPEN
1. Disconnect the SRS Load Tool (8443A) and the SRS Load Jumper (8443-8) from the Passenger Airbag Squib harness connectors.
2. Disconnect the ORC harness connectors.
NOTE: Check connectors - Clean and repair as necessary.
NOTE: After disconnecting the ORC module and the ORC module body harness connector, check the ORC module body harness connector shorting bar pin location. The shorting bar pin location should be down and not visible through the larger center holes of the ORC module body harness connector.
3. Connect the 56 Way ACM Adapter (8443-25) to the ORC harness connectors.
4. Measure the resistance of the (R64) Passenger Squib 2 Line 1 circuit between the Passenger Airbag Squib connector cavity 2 and the 56 Way ACM Adapter (8443-25) cavity 24-19.
Is the resistance below 1.0 Ohm?
Yes
- Go To 4
No
- Repair the (R64) Passenger Squib 2 Line 1 circuit for an open.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
4. CHECK THE (R62) PASSENGER SQUIB 2 LINE 2 CIRCUIT FOR AN OPEN
1. Measure the resistance of the (R62) Passenger Squib 2 Line 2 circuit between the Passenger Airbag Squib connector cavity 1 and the 56 Way ACM Adapter (8443-25) cavity 24-20.
Is the resistance below 1.0 Ohm?
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.
- Replace the ORC. Occupant Restraint Controller - Removal.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
No
- Repair the (R62) Passenger Squib 2 Line 2 circuit for an open.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
5. CHECKING STORED OR INTERMITTENT CODES
NOTE: Diagnose and repair all active codes before diagnosing stored codes. Refer to the complete list of airbag system diagnostic procedures.
1. With the scan tool, record and erase all ORC Control Module DTCs.
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.
2. Using the wiring diagram/schematic as a guide, inspect the related wiring and connectors for chafed, pierced, pinched, and partially broken wires, and for broken, bent, pushed out, corroded, and contaminated terminals. Repair as necessary.
3. Reconnect all disconnected components and harness connectors.
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. With the scan tool, monitor for active codes while performing the following:
- Wiggle the wiring harness and connectors of the related airbag circuit.
- Continue the test until either a code becomes active or the problem area is isolated.
5. In the previous steps you have attempted to recreate the conditions responsible for setting the DTC in question / causing the intermittent condition.
Are any ACTIVE DTCs present?
Yes
- Perform the appropriate diagnostic procedure. Testing and Inspection.
No
- No problem found at this time. Erase all codes before returning the vehicle to the customer.