B2102

B2102-IGNITION RUN/START INPUT CIRCUIT HIGH

For a complete wiring diagram, refer to the Wiring Information Electrical Diagrams.

Theory of Operation

While the CAN bus ignition status is RUN or signal not available and the IOD status is "IN", the Occupant Classification Module (OCM) monitors the CAN BUS message containing the battery voltage. If the module detects that the ignition voltage is greater than 18 volts ±0.25 volts for 3 seconds the DTC be set active.

- When Monitored:
While the CAN bus ignition status is RUN or signal not available and the IOD status is "IN". The module checks the (F12) Fused Ignition Switch Output (Run-Start) circuit voltage input range.

- Set Condition:
If the module detects that the ignition voltage is greater than 18 volts ±0.25 volts for 3 seconds.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Restraints System Pre-Diagnostic Procedure.

1. VERIFY THAT DTC B2102-IGNITION RUN/START INPUT CIRCUIT HIGH IS ACTIVE

NOTE: Ensure the battery is fully charged.

1. With the scan tool, read OCM DTC.

Does the scan tool display active: B2102-IGNITION RUN/START INPUT CIRCUIT HIGH?

Yes

- Go To 2

No

- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. Restraints System Intermittent Test.

2. CHECK FOR CHARGING SYSTEM RELATED DTC IN THE POWERTRAIN CONTROL MODULE (PCM)
1. With the scan tool in ECU View, select PCM and check for any Charging System related DTC.

Does the scan tool display any Charging System related DTC?

Yes

- Diagnose and repair the DTCs. Testing and Inspection.

No

- 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.

- WARNING: If the Occupant Classification Module (OCM) is dropped at any time, it must be replaced. Failure to follow these instructions may result in possible serious or fatal injury.

- Replace the OCM.
- Perform the OCM REZERO. Testing and Inspection.