B1C4E
B1C4E-1st ROW PASSENGER SEAT BELT BUCKLE PRETENSIONER CIRCUIT OPEN
2010 Jeep Truck Grand Cherokee SRT-8 V8-6.1L Page 228
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 Kit 8443A in the tests below substitutes a suspect squib with a known good component. The use of the SRS
Load Tool Adapter 8443A 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 Passenger Seat Belt Tensioner circuits.
- Set Condition:
The ORC has detected an open or high resistance on the Passenger Seat Belt Tensioner circuits.
2010 Jeep Truck Grand Cherokee SRT-8 V8-6.1L Page 229
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.
NOTE: The scan tool, SRS Airbag Load Tool 8443A, and DVOM are required to perform the following test.
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 OPEN PASSENGER SEAT BELT BUCKLE 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 connector.
NOTE: Check the connectors - Clean and repair as necessary.
2010 Jeep Truck Grand Cherokee SRT-8 V8-6.1L Page 230
2. Connect the SRS Load Tool Kit 8443A and SRS Load Tool Jumper 8443-8 to the Passenger Seat Belt Tensioner 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: B1C4E-1st ROW PASSENGER SEAT BELT BUCKLE PRETENSIONER CIRCUIT OPEN?
Yes
- Go To 3
No
- Replace the Passenger Seat Belt Tensioner.
- Perform the ORC VERIFICATION TEST. See: Verification Tests/Occupant Restraint Controller (ORC) Verification Test.
3. CHECK (R56) PASSENGER SEAT BELT BUCKLE TENSIONER LINE 1 CIRCUIT AND (R54) PASSENGER SEAT BELT BUCKLE
TENSIONER LINE 2 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 Kit 8443A and SRS Load Tool Jumper 8443-8 from the Passenger 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 (R54) Passenger Seat Belt Buckle Tensioner Line 1 circuit between the Passenger Seat Belt Tensioner connector
cavity 1 and the SRS Load Tool Adapter 8443-24 cavity C1-4.
5. Measure the resistance of the (R56) Passenger Seat Belt Buckle Tensioner Line 2 circuit between the Passenger Seat Belt Tensioner connector
cavity 2 and the SRS Load Tool Adapter 8443-24 cavity C1-3.
Is the resistance below 1.0 Ohm for both circuits?
Yes
2010 Jeep Truck Grand Cherokee SRT-8 V8-6.1L Page 231
- 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.
No
- Repair the open (R54) or (R56) Passenger Seat Belt Buckle Tensioner circuits.
- Perform the ORC VERIFICATION TEST. See: Verification Tests/Occupant Restraint Controller (ORC) Verification Test.
B1C4E-1st ROW PASSENGER SEAT BELT BUCKLE PRETENSIONER CIRCUIT OPEN
2010 Jeep Truck Grand Cherokee SRT-8 V8-6.1L Page 228
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 Kit 8443A in the tests below substitutes a suspect squib with a known good component. The use of the SRS
Load Tool Adapter 8443A 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 Passenger Seat Belt Tensioner circuits.
- Set Condition:
The ORC has detected an open or high resistance on the Passenger Seat Belt Tensioner circuits.
2010 Jeep Truck Grand Cherokee SRT-8 V8-6.1L Page 229
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.
NOTE: The scan tool, SRS Airbag Load Tool 8443A, and DVOM are required to perform the following test.
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 OPEN PASSENGER SEAT BELT BUCKLE 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 connector.
NOTE: Check the connectors - Clean and repair as necessary.
2010 Jeep Truck Grand Cherokee SRT-8 V8-6.1L Page 230
2. Connect the SRS Load Tool Kit 8443A and SRS Load Tool Jumper 8443-8 to the Passenger Seat Belt Tensioner 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: B1C4E-1st ROW PASSENGER SEAT BELT BUCKLE PRETENSIONER CIRCUIT OPEN?
Yes
- Go To 3
No
- Replace the Passenger Seat Belt Tensioner.
- Perform the ORC VERIFICATION TEST. See: Verification Tests/Occupant Restraint Controller (ORC) Verification Test.
3. CHECK (R56) PASSENGER SEAT BELT BUCKLE TENSIONER LINE 1 CIRCUIT AND (R54) PASSENGER SEAT BELT BUCKLE
TENSIONER LINE 2 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 Kit 8443A and SRS Load Tool Jumper 8443-8 from the Passenger 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 (R54) Passenger Seat Belt Buckle Tensioner Line 1 circuit between the Passenger Seat Belt Tensioner connector
cavity 1 and the SRS Load Tool Adapter 8443-24 cavity C1-4.
5. Measure the resistance of the (R56) Passenger Seat Belt Buckle Tensioner Line 2 circuit between the Passenger Seat Belt Tensioner connector
cavity 2 and the SRS Load Tool Adapter 8443-24 cavity C1-3.
Is the resistance below 1.0 Ohm for both circuits?
Yes
2010 Jeep Truck Grand Cherokee SRT-8 V8-6.1L Page 231
- 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.
No
- Repair the open (R54) or (R56) Passenger Seat Belt Buckle Tensioner circuits.
- Perform the ORC VERIFICATION TEST. See: Verification Tests/Occupant Restraint Controller (ORC) Verification Test.
