B2104

B2104-IGNITION UNLOCK RUN/START CONTROL CIRCUIT LOW





For a complete wiring diagram Refer to Diagrams/Electrical.

- When Monitored:

With the ignition on.

- Set Condition:

The Front Control Module will set this DTC within 500ms if the ignition unlock run/start circuit voltage is less than the expected value.





Diagnostic Test

1.CHECK FOR ACTIVE DTC

With the scan tool, read the active DTC's.

Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 90 seconds.

With the scan tool, read the active DTC's.

Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.

2.SHIFTER LEVER ASSEMBLY





Turn the ignition off.

Disconnect the Shifter Lever Assembly harness connector.

Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 90 seconds.

With the scan tool, read the active FCM DTC's.

Does the scan tool display this DTC as active?

Yes

- Go To 3

No

- Replace the Shifter Lever Assembly.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

3.(F902) IGNITION UNLOCK RUN START CIRCUIT SHORTED TO GROUND





Turn the ignition off.

Remove the FCM from the IPM.

Measure the resistance between ground and the (F902) Ignition Unlock Run Start circuit.

Is the resistance below 100.0 ohms?

Yes

- Repair the (F902) Ignition Unlock Run Start circuit for a short to ground.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Front Control Module.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test