Diagnostic Test

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 DTC. See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Diagnosis and Testing  for a complete list of DTCs.

   No 

   • Go to step  2

1. With the scan tool, read the OCM DTCs.

   Does the scan tool display active B1B7E-PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT LOW DTC?

   Yes 

   • Go to step  3

   No 

   • Perform the OCS INTERMITTENT TEST. See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Standard Procedure .

1. With the scan tool, read the OCM DTCs.

   Does the scan tool display active B1B7F-PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT HIGH DTC?

   Yes 

   • Perform the B1B7F-PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT HIGH diagnostic test. See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Diagnosis and Testing .

   No 

   • Go to step  4

1. Using the wiring diagram / schematic as a guide, inspect the Passenger Seat Harness wiring and connectors. Look for chaffed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.

   Are any of these conditions present?

   Yes 

   NOTE: Do not attempt to repair the Seat Harness. Replace the Seat Harness if the condition inspecting or testing for is present in the Seat Harness.
   • Replace the Passenger Seat Harness in accordance with the Service Information.
   • Perform the RE-ZERO OCM SEAT WEIGHT SENSORS diagnostic procedure. See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Standard Procedure .

   No 

   • Go to step  5

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 the RE-ZERO OCM SEAT WEIGHT SENSORS diagnostic procedure. See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Standard Procedure .

Fig 1: Measuring 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. 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

Fig 2: Checking Right-Front Seat Weight Sensor Signal Circuit For A Short To Ground

Courtesy of CHRYSLER LLC

1. Disconnect the OCM C2 connector.
2. Measure the resistance of the (R718) RT-FT Seat Weight Sensor Signal circuit between the OCM C2 connector cavity 5 and ground.

   Is the resistance below 5.0 Ohms?

   Yes 

   NOTE: Do not attempt to repair the Seat Harness. Replace the Seat Harness if the condition inspecting or testing for is present in the Seat Harness.
   • Replace the Passenger Seat Harness in accordance with the Service Information.
   • Perform the RE-ZERO OCM SEAT WEIGHT SENSORS diagnostic procedure. See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Standard Procedure .

   No 

   • Go to step  8

Fig 3: Checking Right-Front 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 cavity 5 and the Right-Front Seat Weight Sensor connector cavity 2.

   Is the resistance below 5.0 Ohms?

   Yes 

   • Replace the Right-Front Seat Weight Sensor in accordance with the Service Information.
   • Perform the RE-ZERO OCM SEAT WEIGHT SENSORS diagnostic procedure. 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, Go to step  10

   No 

   NOTE: Do not attempt to repair the Seat Harness. Replace the Seat Harness if the condition inspecting or testing for is present in the Seat Harness.
   • Replace the Passenger Seat Harness in accordance with the Service Information.
   • Perform the RE-ZERO OCM SEAT WEIGHT SENSORS diagnostic procedure. See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Standard Procedure .

Fig 4: Checking Seat Weight Sensor 5-Volt Circuit For An Open

Courtesy of CHRYSLER LLC

1. Disconnect the OCM C2 connector.
2. Measure the resistance of the (R701) Seat Weight Sensor 5-volt circuit between the OCM C2 connector cavity 1 and the Right-Front Seat Weight Sensor connector cavity 3.

   Is the resistance below 5.0 Ohms?

   Yes 

   WARNING: If the Occupant Classification Module (OCM) is dropped at any time, it must be replaced. Failure to take the proper precautions could result in accidental airbag deployment and may result in possible serious or fatal injury.
   • Replace the OCM in accordance with the Service Information.
   • Perform the RE-ZERO OCM SEAT WEIGHT SENSORS diagnostic procedure. See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Standard Procedure .

   No 

   NOTE: Do not attempt to repair the Seat Harness. Replace the Seat Harness if the condition inspecting or testing for is present in the Seat Harness.
   • Replace the Passenger Seat Harness in accordance with the Service Information.
   • Perform the RE-ZERO OCM SEAT WEIGHT SENSORS diagnostic procedure. See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Standard Procedure .

View repair

Yes 

• Replace the OCM in accordance with the Service Information.
• Perform the RE-ZERO OCM SEAT WEIGHT SENSORS diagnostic procedure. See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Standard Procedure .