B0135-11
B0135-11-PASSENGER ADAPTIVE LOAD LIMITER - CIRCUIT SHORT TO GROUND
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 ORC (connected to neither power nor ground) as protection against inadvertent deployment. Use of the 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 ORC harness connector. The adaptive load limiter on the passenger side front retractor is activated only after both the retractor and anchor buckle tensioners. The ORC uses the adaptive load limiter to adjust the belt resistance based upon impact data, to reduce the force of the tightened seat belt on the chest of the front passenger seat occupant, reducing the potential for injuries. The adaptive load limiter cannot be repaired and, if ineffective or damaged, the entire front seat belt and retractor unit must be replaced. If the front airbags have been deployed, the adaptive load limiter has also been deployed. An adaptive load-limiting device is integral to the front passenger seat belt retractor to supplement the anchor buckle and retractor tensioners. The adaptive load limiter is controlled by the Occupant Restraint Controller (ORC). The front passenger retractor has a two pyrotechnic initiators, one for the adaptive load limiter and one for the tensioner. The adaptive load limiter initiator is connected to the vehicle electrical system through a dedicated take out of the body wire harness by a keyed and latching yellow molded plastic connector insulator to ensure a secure connection. The adaptive load limiter is not intended for reuse and must be replaced following any front airbag deployment. Seat Belt Retractor - Removal.
- When Monitored:
With the ignition on.
- Set Condition:
The Occupant Restraint Controller (ORC) monitors the resistance of the Passenger Seat Belt Adaptive Load Limiter circuits. The ORC will set this DTC if it detects low resistance on the Passenger Seat Belt Adaptive Load Limiter 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 4
2. CHECK FOR SHORTED PASSENGER SEAT BELT TENSIONER
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 Seat Belt Tensioner harness connector.
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 Seat Belt Tensioner 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: B0135-11-PASSENGER ADAPTIVE LOAD LIMITER - CIRCUIT SHORT TO GROUND - DTC?
Yes
- Go To 3
No
- Replace the Passenger Seat Belt Tensioner. Seat Belt Retractor - Removal.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
3. CHECK THE (R78) PASSENGER ADAPTIVE LOAD LIMITER LINE 1 CIRCUIT AND THE (R75) PASSENGER ADAPTIVE LOAD LIMITER LINE 2 CIRCUIT FOR A SHORT TO GROUND
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) and the SRS Load Jumper (8443-8) from the Passenger Seat Belt Tensioner 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 C1 harness connector.
4. Measure the resistance of the (R78) Passenger Adaptive Load Limiter Line 1 circuit between ground and the SRS Load Tool 56 Way ACM Adapter (8443-25)cavity 32-17.
5. Measure the resistance of the (R75) Passenger Adaptive Load Limiter Line 2 circuit between ground and the SRS Load Tool 56 Way ACM Adapter (8443-25)cavity 32-18.
Is the resistance below 10k Ohms on either circuit?
Yes
- Repair the Passenger Seat Belt Tensioner circuits with resistance below 10k Ohms for a short to ground.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.
No
- 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.
4. 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 Airbag System 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 chaffed, 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
- Select the appropriate diagnostic procedure.
No
- No problem found at this time. Erase all codes before returning the vehicle to the customer.