OCM INTERNAL 1


  • When Monitored:

    With the ignition on.

  • Set Condition:

    The Occupant Classification Module (OCM) will set this DTC if it detects an out of range internal circuit or low voltage on the (F201) Fused Ignition Switch Output (Run-Start) circuit.


Possible Causes
  
BATTERY VOLTAGE LOW
  
(F201) FUSED IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT VOLTAGE LOW
  
OCM
  


1.CHECK FOR ACTIVE DTCs IN THE OCCUPANT RESTRAINT CONTROLLER (ORC)

NOTE: Ensure that the battery is fully charged.




NOTE: Some DTCs require up to one minute to mature.



Does the scan tool display: Loss Of Ignition Run - Start?

Yes
  • Diagnose and repair the DTC. Refer to the Table of Contents in this Section for a complete list of airbag system diagnostic procedures.


No
  • Go To 2

2.INSPECT THE OCCUPANT CLASSIFICATION SYSTEM (OCS) WIRING AND CONNECTORS FOR CONDITIONS THAT CAUSED THE DTC TO SET


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




Are any of these conditions present?

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 personal injury or death.

    NOTE: The Occupant Classification Module (OCM) and the Passenger Seat Bladder and Cushion Kit are the only serviceable OCS components.

  • Replace the OCS Bladder and Cushion Kit in accordance with the Service information.
  • Perform SYSTEM VERIFICATION REQUIRED test.
  • Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1.


No
  • Go To 3

3.CHECK THE (F201) FUSED IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT AND GROUND CIRCUIT FUNCTION AT THE OCM HARNESS CONNECTOR



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




Is the voltage below 11.0 volts?

Yes
  • Go To 4


No
  • Go To 5

4.CHECK THE (F201) FUSED IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT VOLTAGE AT THE (C313) VEHICLE BODY IN-LINE HARNESS CONNECTOR

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



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




Is the voltage below 11.0 volts?

Yes

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

  • Repair as necessary to fix the low voltage condition to the Seat harness connector.
  • Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1.


No

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

    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 personal injury or death.

    NOTE: The Bladder and Cushion Kit are calibrated as an assembly. Do not disconnect the Bladder from the Cushion Kit. Service only as an assembly.

  • Replace OCS Bladder and Cushion Kit in accordance with the Service information.
  • Perform SYSTEM VERIFICATION REQUIRED test.
  • Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1.

5.DETERMINE ACTIVE OR STORE DTC

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



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



NOTE: Some DTCs require up to one minute to mature.



Does the scan tool display: OCM Internal 1?

Yes
  • Go To 6


No
  • Go To 7

6.DETERMINE THE CORRECT REPAIR

NOTE: The Occupant Classification Module (OCM) and the Passenger Seat Bladder and Cushion Kit are the only serviceable OCS components.


  • If possible, check the vehicle's repair history.
  • The Service Kit wiring harness uses tamper resistant material on the harness connector. Inspect for the tamper resistant material on the harness connector.


Does the seat have a Bladder and Cushion Service Kit?

Yes

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

    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 personal injury or death.

    NOTE: The Bladder and Cushion Kit are calibrated as an assembly. Do not disconnect the Bladder from the Cushion Kit. Service only as an assembly.

  • Replace OCS Bladder and Cushion Kit in accordance with the Service information.
  • Perform SYSTEM VERIFICATION REQUIRED test.
  • Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1.


No

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

    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 personal injury or death.

    NOTE: The Bladder and Cushion Kit are calibrated as an assembly. Do not disconnect the Bladder from the Cushion Kit. Service only as an assembly.

  • Replace the OCM in accordance with the Service Information.
  • Perform SYSTEM VERIFICATION REQUIRED test.
  • Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1.

7.TEST FOR AN INTERMITTENT CONDITION


NOTE: The Passenger Airbag On-Off Indicator will illuminate within one second of a fault becoming active.

  • Verify that all connectors are completely seated and locked.
  • Wiggle the wiring harness and connectors of the related circuit.


NOTE: Some DTCs require up to one minute to mature.



Does the scan tool display any active DTCs?

Yes
  • Select the appropriate diagnostic procedure from the Table of Contents in this section.


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