Diagnostic Test

CHECK FOR ACTIVE INTERNAL FAULTS, IGNITION FAULTS, AND BATTERY FAULTS IN THE OCCUPANT CLASSIFICATION MODULE (OCM)
NOTE: Make sure that the battery is fully charged.
1. Turn the ignition on, then off, and then on again.
2. With the scan tool, read Occupant Classification Module (OCM) DTCs.
  Does the scan tool display any active DTCs relating to internal faults, ignition faults, or battery faults?
  
  Yes
  - Diagnose and repair the DTCs. See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Diagnosis and Testing .
  No
  - Go to step 2
VERIFY THAT DTC B1B7E-PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT LOW IS ACTIVE
1. With the scan tool, read OCM DTCs.
  Does the scan tool display active: B1B7E-PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT LOW?
  
  Yes
  - Go to step 3
  No
  - Go to step 10
VERIFY THAT DTC B1B7F-PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT HIGH AND B1B7E-PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT LOW ARE BOTH ACTIVE
1. With the scan tool, read OCM DTCs.
  Does the scan tool display active: B1B7F-PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT HIGH?
  
  Yes
  - Perform B1B7E-PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT HIGH diagnostic procedure. See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Diagnosis and Testing .
  No
  - Go to step 4
INSPECT PASSENGER SEAT HARNESS WIRES AND CONNECTORS
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. Using the wiring diagram/schematic as a guide, inspect the Passenger Seat Harness wiring and connectors. Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.
  Are any of these conditions present?
  
  Yes
  - Replace the Passenger Seat Harness in accordance with the Service Information.
  - Perform OCCUPANT CLASSIFICATION MODULE SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Standard Procedure .
  No
  - Go to step 5
VERIFY THAT PASSENGER SEAT HARNESS IS ROUTED CORRECTLY
1. Verify that the Passenger Seat Harness is routed correctly.
  Is the Passenger Seat Harness routed correctly?
  
  Yes
  - Go to step 6
  No
  - Reroute the Passenger Seat Harness as necessary.
  - Perform OCCUPANT CLASSIFICATION MODULE SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Standard Procedure .
CHECK VOLTAGE OF (R701) SEAT WEIGHT SENSOR 5 VOLT CIRCUIT

Fig 1: Checking Voltage Of Seat Weight Sensor 5 Volt Circuit
Courtesy of CHRYSLER LLC
1. Disconnect the Right-Front Seat Weight Sensor 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.
2. Measure the voltage of the (R701) Seat Weight Sensor 5 Volt circuit.
  Is the voltage above 4.8 volts?
  
  Yes
  - Go to step 7
  No
  - Go to step 9
CHECK (R718) RT-FT SEAT WEIGHT SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 2: Checking RT-FT Seat Weight Sensor Signal Circuit For A Short To Ground
Courtesy of CHRYSLER LLC

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 OCM connectors.
2. Measure the resistance of the (R718) RT-FT Seat Weight Sensor Signal circuit between ground and the OCM C2 connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Replace the Passenger Seat Harness in accordance with the Service Information.
  - Perform OCCUPANT CLASSIFICATION MODULE SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Standard Procedure .
  No
  - Go to step 8
CHECK (R718) RT-FT SEAT WEIGHT SENSOR SIGNAL CIRCUIT FOR AN OPEN

Fig 3: Checking RT-FT Seat Weight Sensor Signal Circuit For An Open
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (R718) RT-FT Seat Weight Sensor Signal circuit between the OCM C2 connector and the Right-Front Seat Weight Sensor connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Replace the Right-Front Seat Weight Sensor in accordance with the Service Information.
  - Perform OCCUPANT CLASSIFICATION MODULE SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Standard Procedure .
  - If DTC B1B7E-PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT LOW returns active, replace the OCM in accordance with the Service Information. See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Diagnosis and Testing .
  No
  - Replace the Passenger Seat Harness in accordance with the Service Information.
  - Perform OCCUPANT CLASSIFICATION MODULE SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Standard Procedure .
CHECK (R701) SEAT WEIGHT SENSOR 5 VOLT CIRCUIT FOR AN OPEN

Fig 4: Checking Seat Weight Sensor 5 Volt Circuit For An Open
Courtesy of CHRYSLER LLC

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 OCM connectors.
2. Measure the resistance of the (R701) Seat Weight Sensor 5 Volt circuit between the OCM C2 connector and the Right-Front Seat Weight Sensor connector.
  Is the resistance below 5.0 Oohms?
  
  Yes
  - Replace the OCM in accordance with the Service Information.
  - Perform OCCUPANT CLASSIFICATION MODULE SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Standard Procedure .
  No
  - Replace the Passenger Seat Harness in accordance with the Service Information.
  - Perform OCCUPANT CLASSIFICATION MODULE SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Standard Procedure .
CHECKING STORED OR INTERMITTENT CODES
NOTE: Diagnose and repair all active codes before diagnosing stored codes. Refer to DIAGNOSTIC CODE INDEX for a 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 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:
  WARNING: Maintain a safe distance from all airbags while performing the following steps. Failure to follow these instructions may result in possible serious or fatal injury.
  - 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
  - See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Diagnosis and Testing and perform the appropriate diagnostic procedure.
  No
  - No problem found at this time. Perform the Occupant Classification Module System Verification Test. Erase all codes before returning vehicle to customer. See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Standard Procedure .