B0116-1B
B0116-1B-FRONT DRIVER KNEE BAG - 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 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 SRS Load Tool 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 Front Driver Knee Bag is mounted in the instrument panel behind the knee bolster, below the steering column, it is a single stage device.
- When Monitored:
The ORC Module sends out a 40 mA diagnostic current on each squib voltage supply circuit at power up, and every 500 ms thereafter while the ignition is on.
- Set Condition:
This Diagnostic Trouble Code (DTC) sets when the ORC detects an open on the driver knee bolster squib circuit for more than 2.6 seconds. This DTC transitions from active to stored when the ORC sees a recovery from a short to ground for greater than 2.6 seconds.
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Restraints System Pre-Diagnostic Procedure.
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
- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. Restraints System Intermittent Condition Test.
2. CHECK FOR OPEN DRIVER KNEE BOLSTER AIRBAG CIRCUITS
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 Driver Knee Bolster Airbag harness connector.
NOTE: Check connectors - Clean and repair as necessary.
2. Connect the SRS Load Tool (8443A) to the SRS Load Jumper (8443-8) to the Driver Knee Bolster Airbag harness connector.
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: B0116-1B-FRONT DRIVER KNEE BAG - CIRCUIT RESISTANCE ABOVE THRESHOLD - DTC?
Yes
- Go To 3
No
- Replace the Driver Knee Bolster Airbag. Knee Blocker Air Bag - Removal.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
3. CHECK (R11) DRIVER KNEE BLOCKER SQUIB LINE 1 CIRCUIT FOR AN OPEN
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 SRS Load Tool (8443A) from the SRS Load Jumper (8443-8) from the Driver Knee Bolster Airbag harness connector.
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 SRS Load Tool 56 Way ACM Adapter (8443-25) to the ORC C2 harness connector.
4. Measure the resistance of the (R11) Driver Knee Blocker Squib Line 1 circuit between the Driver knee Bolster Airbag harness connector terminal 2 and the SRS Load Tool 56 Way ACM Adapter (8443-25) terminal C1-B 7.
Is the resistance below 1.0 Ohm?
Yes
- Go To 4
No
- Repair the (R11) Driver Knee Blocker Squib Line 1 circuit for an open.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
4. CHECK (R9) DRIVER KNEE BLOCKER SQUIB LINE 2 CIRCUIT FOR AN OPEN
1. Measure the resistance of the (R9) Driver Knee Blocker Squib Line 2 circuit between the Driver Knee Bolster Airbag harness connector and the SRS Load Tool 56 Way ACM Adapter (8443-25).
Is the resistance below 1.0 Ohm?
Yes
- 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. 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 (R9) Driver Knee Blocker Squib Line 2 circuit for an open.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.