B1C3D
B1C3D-1st ROW DRIVER SEAT BELT BUCKLE PRETENSIONER CIRCUIT LOW
2010 Jeep Truck Grand Cherokee SRT-8 V8-6.1L Page 211
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 Kit 8443A in the tests below, substitutes a suspect squib with a known good component. The use of the SRS
Load Tool jumpers and the SRS Load Tool Adapter tool provides a test point, as well as a method for opening the shorting bar connections within
the harness connector.
- When Monitored:
With the ignition on, the Occupant Restraint Controller (ORC) monitors the resistance of the Driver Seat Belt Tensioner circuits.
- Set Condition:
2010 Jeep Truck Grand Cherokee SRT-8 V8-6.1L Page 212
The ORC has detected low resistance on the Driver Seat Belt Tensioner circuits.
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See: Restraints and Safety Systems/Testing and
Inspection/Initial Inspection and Diagnostic Overview/Restraints System Pre-Diagnostic Procedure.
1. DETERMINE ACTIVE OR STORED DTC
NOTE: Make sure the battery is fully charged.
1. Select Active or Stored DTC.
Is the DTC active or stored?
ACTIVE DTC
- Go To 2
STORED DTC
- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. . See: Restraints and Safety Systems/Testing and Inspection/Initial
Inspection and Diagnostic Overview/Restraints System Intermittent Condition Test
2. CHECK FOR SHORTED DRIVER SEAT BELT TENSIONER CIRCUIT
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 Seat Belt Tensioner connector.
NOTE: Check the connectors - Clean and repair as necessary.
2. Connect the SRS Load Tool Kit 8443A and SRS Load Tool Jumper 8443-8 to the Driver Seat Belt Tensioner connector.
2010 Jeep Truck Grand Cherokee SRT-8 V8-6.1L Page 213
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: B1C3D-1st ROW DRIVER SEAT BELT BUCKLE PRETENSIONER CIRCUIT LOW
Yes
- Go To 3
No
- Replace the Driver Seat Belt Tensioner.
- Perform the ORC VERIFICATION TEST. See: Verification Tests/Occupant Restraint Controller (ORC) Verification Test.
3. CHECK (R55) AND (R53) DRIVER SEAT BELT TENSIONER CIRCUITS 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 Kit 8443A and SRS Load Tool Jumper 8443-8 from the Driver Seat Belt Tensioner connector.
2. Disconnect the ORC connectors.
NOTE: Check the connectors - Clean and repair as necessary.
3. Connect the SRS Load Tool Adapter 8443-24 to the ORC C1 connector.
4. Measure the resistance of the (R55) Driver Seat Belt Tensioner Line 1 circuit between the Driver Seat Belt Tensioner connector cavity 1 and
ground.
5. Measure the resistance of the (R53) Driver Seat Belt Tensioner Line 2 circuit between the Driver Seat Belt Tensioner connector cavity 2 and
ground.
Is the resistance below 10K Ohms on either circuit?
Yes
- Repair the shorted to ground Driver Seat Belt Tensioner circuits.
- Perform the ORC VERIFICATION TEST. See: Verification Tests/Occupant Restraint Controller (ORC) Verification Test.
No
- 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 ORC.
- Perform the ORC VERIFICATION TEST. See: Verification Tests/Occupant Restraint Controller (ORC) Verification Test.
B1C3D-1st ROW DRIVER SEAT BELT BUCKLE PRETENSIONER CIRCUIT LOW
2010 Jeep Truck Grand Cherokee SRT-8 V8-6.1L Page 211
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 Kit 8443A in the tests below, substitutes a suspect squib with a known good component. The use of the SRS
Load Tool jumpers and the SRS Load Tool Adapter tool provides a test point, as well as a method for opening the shorting bar connections within
the harness connector.
- When Monitored:
With the ignition on, the Occupant Restraint Controller (ORC) monitors the resistance of the Driver Seat Belt Tensioner circuits.
- Set Condition:
2010 Jeep Truck Grand Cherokee SRT-8 V8-6.1L Page 212
The ORC has detected low resistance on the Driver Seat Belt Tensioner circuits.
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See: Restraints and Safety Systems/Testing and
Inspection/Initial Inspection and Diagnostic Overview/Restraints System Pre-Diagnostic Procedure.
1. DETERMINE ACTIVE OR STORED DTC
NOTE: Make sure the battery is fully charged.
1. Select Active or Stored DTC.
Is the DTC active or stored?
ACTIVE DTC
- Go To 2
STORED DTC
- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. . See: Restraints and Safety Systems/Testing and Inspection/Initial
Inspection and Diagnostic Overview/Restraints System Intermittent Condition Test
2. CHECK FOR SHORTED DRIVER SEAT BELT TENSIONER CIRCUIT
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 Seat Belt Tensioner connector.
NOTE: Check the connectors - Clean and repair as necessary.
2. Connect the SRS Load Tool Kit 8443A and SRS Load Tool Jumper 8443-8 to the Driver Seat Belt Tensioner connector.
2010 Jeep Truck Grand Cherokee SRT-8 V8-6.1L Page 213
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: B1C3D-1st ROW DRIVER SEAT BELT BUCKLE PRETENSIONER CIRCUIT LOW
Yes
- Go To 3
No
- Replace the Driver Seat Belt Tensioner.
- Perform the ORC VERIFICATION TEST. See: Verification Tests/Occupant Restraint Controller (ORC) Verification Test.
3. CHECK (R55) AND (R53) DRIVER SEAT BELT TENSIONER CIRCUITS 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 Kit 8443A and SRS Load Tool Jumper 8443-8 from the Driver Seat Belt Tensioner connector.
2. Disconnect the ORC connectors.
NOTE: Check the connectors - Clean and repair as necessary.
3. Connect the SRS Load Tool Adapter 8443-24 to the ORC C1 connector.
4. Measure the resistance of the (R55) Driver Seat Belt Tensioner Line 1 circuit between the Driver Seat Belt Tensioner connector cavity 1 and
ground.
5. Measure the resistance of the (R53) Driver Seat Belt Tensioner Line 2 circuit between the Driver Seat Belt Tensioner connector cavity 2 and
ground.
Is the resistance below 10K Ohms on either circuit?
Yes
- Repair the shorted to ground Driver Seat Belt Tensioner circuits.
- Perform the ORC VERIFICATION TEST. See: Verification Tests/Occupant Restraint Controller (ORC) Verification Test.
No
- 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 ORC.
- Perform the ORC VERIFICATION TEST. See: Verification Tests/Occupant Restraint Controller (ORC) Verification Test.
