7000 - 7999: 7251

7251-LOST COMMUNICATION WITH SCM

For a complete wiring diagram Consult Diagrams/Electrical.

- When Monitored:

- With the ignition on
- Battery voltage between 10 and 16 volts
- IOD fuse installed
- BCM is configured correctly
- Set Condition:
Bus messages not received from the Steering Control Module for approximately 500ms.





Diagnostic Test

1. VERIFY DTC IS ACTIVE
NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.

With the scan tool, read active DTCs.
Is this DTC active?

Yes

- Go To 2

No

- Refer to the Stored Lost Communication test procedure. Stored Lost Communication DTCs
- Perform BODY VERIFICATION TEST - VER 1.Verification Tests

2. VERIFY THAT THE STEERING ANGLE SENSOR IS ACTIVE ON THE BUS
Turn the ignition on.
With the scan tool, select Network Diagnostics.
Verify that the Steering Angle Sensor is active on the bus.
Is the Steering Angle Sensor active on the bus?

Yes

- Go To 3

No

- Refer to the No Response test procedure.Communications - Verbose Codes
- Perform BODY VERIFICATION TEST - VER 1.Verification Tests

3. STEERING ANGLE SENSOR
Replace the Steering Angle Sensor.
Perform ABS VERIFICATION TEST - VER 1. Verification Tests.
With the scan tool, read ABS DTCs.
Did DTC U0126-LOST COMMUNICATION WITH STEERING ANGLE SENSOR reset?

Yes

- Replace the Anti-Lock Brakes Module.
- Perform ABS VERIFICATION TEST - VER 1. Verification Tests.

No

- Test Complete.