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Diagnostic Test

WARNING: This page is about a different car, the 2006 Dodge Magnum, 2006 Dodge Charger, and 2006 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. 1)  CHECK FOR ACTIVE INTERNAL FAULTS, IGNITION FAULTS, AND BATTERY FAULTS IN THE OCCUPANT CLASSIFICATION MODULE (OCM) 
    NOTE: Ensure the battery is fully charged.
    NOTE: When reconnecting Airbag system components, the ignition must be turned off and the battery must be disconnected.

    Turn the ignition on, then off, and then on again.

    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 

    1. Diagnose and repair the DTCs. Refer to DIAGNOSTIC CODE INDEX for a complete list of symptoms.

    No 

    1. Go To  2).
  2. 2)  VERIFY THAT DTC B1B7E-PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT LOW IS ACTIVE 

    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 

    1. Go To  3).

    No 

    1. Go To  10).
  3. 3)  INSPECT PASSENGER SEAT HARNESS WIRES AND CONNECTORS 
    WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

    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 

    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.
    1. Replace the Passenger Seat Harness in accordance with the Service Information.
    2. Perform *OCS VERIFICATION TEST - VER 1 .

    No 

    1. Go To  4).
  4. 4)  VERIFY THAT PASSENGER SEAT HARNESS IS ROUTED CORRECTLY 

    Verify that the Passenger Seat Harness is routed correctly.

    Is the Passenger Seat Harness routed correctly? 

    Yes 

    1. Go To  5).

    No 

    1. Reroute the Passenger Seat Harness as necessary. Then, Go To  5).
  5. 5)  CHECK IF MORE THAN ONE PASSENGER SEAT WEIGHT SENSOR DTC IS ACTIVE 

    Verify that all of the Seat Weight Sensor mounting screws are torqued to specification. Refer to SEATS .

    WARNING: To avoid personal injury or death, turn the ignition on, then reconnect the battery.
    NOTE: Failure to follow test instructions or aborting the test will cause faults to set when performing the Occupant Classification Module System Verification Test. To prevent faults due to process errors: Verify That All Tests Steps That Led You Here Were Performed As Directed; Verify That The Ignition Is In Run; Wait 30 Seconds After Changing The Seat Weight Before Proceeding To Allow The System To Stabilize; Only Press Scan Tool Buttons When Directed To Do So; and Perform The Occupant Classification Module System Verification Test To Completion.

    With the scan tool in OCM, select More Options, select System Tests, and select Occupant Classification Module System Verification Test. Run the test by following the instructions displayed on the scan tool. When the test is complete, wait two minutes, and then proceed as follows.

    With the scan tool, read OCM DTCs.

    Does the scan tool display any active PASSENGER SEAT WEIGHT SENSOR DTCs? 

    Yes - More Than One PASSENGER SEAT WEIGHT SENSOR DTC Is Active 

    1. Perform the *Diagnosis/Checkout Procedure For Seat Weight Sensors.
    2. Perform *OCS VERIFICATION TEST - VER 1 .

    Yes - Only DTC B1B7E Is Active 

    1. Go To  6).

    No - But Other DTCs Present 

    1. Diagnose and repair the DTCs. Refer to DIAGNOSTIC CODE INDEX for a complete list of symptoms.

    No - No Active DTCs Present 

    1. Perform *OCS VERIFICATION TEST - VER 1 .
  6. 6)  CHECK VOLTAGE OF (R701) SEAT WEIGHT SENSOR 5 VOLT CIRCUIT 
    Fig 1: Checking Right Front Seat Weight Sensor 5 Volt Circuit
    GC0009889Courtesy of DAIMLERCHRYSLER CORP.
    WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

    Disconnect the Right-Front Seat Weight Sensor connector.

    WARNING: To avoid personal injury or death, turn the ignition on, then reconnect the battery.

    Measure the voltage of the (R701) Seat Weight Sensor 5 Volt circuit.

    Is the voltage above 4.8 volts? 

    Yes 

    1. Go To  7).

    No 

    1. Go To  9).
  7. 7)  CHECK (R718) RT-FT SEAT WEIGHT SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    Fig 2: Checking Right Front Seat Weight Sensor Signal Circuit
    GC0009890Courtesy of DAIMLERCHRYSLER CORP.
    WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

    Disconnect the OCM C2 connector.

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

    Is the resistance below 10k 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.
    1. Replace the Passenger Seat Harness in accordance with the Service Information.
    2. Perform *OCS VERIFICATION TEST - VER 1 .

    No 

    1. Go To  8).
  8. 8)  CHECK (R718) RT-FT SEAT WEIGHT SENSOR SIGNAL CIRCUIT FOR AN OPEN 
    Fig 3: Checking Right Front Seat Weight Sensor Signal Circuit For Open
    GC0009891Courtesy of DAIMLERCHRYSLER CORP.

    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 

    1. Replace the Right-Front Seat Weight Sensor in accordance with the Service Information. Perform OCS VERIFICATION TEST - VER 1. If DTC B1B7E-PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT LOW returns active, replace the OCM in accordance with the Service Information.
    2. Perform *OCS VERIFICATION TEST - VER 1 .

    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.
    1. Replace the Passenger Seat Harness in accordance with the Service Information.
    2. Perform *OCS VERIFICATION TEST - VER 1 .
  9. 9)  CHECK (R701) SEAT WEIGHT SENSOR 5 VOLT CIRCUIT FOR AN OPEN 
    Fig 4: Checking Right Front Seat Weight Sensor 5-Volt Circuit
    GC0009892Courtesy of DAIMLERCHRYSLER CORP.
    WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

    Disconnect the OCM C2 connector.

    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 ohms? 

    Yes 

    1. Replace the OCM in accordance with the Service Information.
    2. Perform *OCS VERIFICATION TEST - VER 1 .

    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.
    1. Replace the Passenger Seat Harness in accordance with the Service Information.
    2. Perform *OCS VERIFICATION TEST - VER 1 .
  10. 10)  TEST FOR INTERMITTENT CONDITION 

    With the scan tool, record and erase all DTCs from all Airbag modules.

    If any ACTIVE codes are present they must be resolved before diagnosing any stored codes.

    WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

    Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.

    Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.

    The following additional checks may assist you in identifying a possible intermittent problem.

    Reconnect any disconnected components and harness connector.

    WARNING: To avoid personal injury or death, turn the ignition on, then reconnect the battery.

    With the scan tool, monitor active codes as you work through the following steps.

    WARNING: To avoid personal injury or death, maintain a safe distance from all airbags while performing the following steps.

    Wiggle the wiring harness and connectors of the related airbag circuit or component.

    If codes are related to the Driver Airbag circuits, rotate the steering wheel from stop to stop.

    If only stored codes return, continue the test until the problem area has been isolated.

    In the previous steps you have attempted to recreate the conditions responsible for setting the active DTC in question.

    Does the scan tool display any ACTIVE DTCs? 

    Yes 

    1. Select appropriate symptom from Symptom List.

    No 

    1. No problem found at this time. Erase all codes before returning vehicle to customer.
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