U0212

U0212-LOST COMMUNICATION WITH SCCM - CAN B

U0212 - Lost Communication With SCCM - Can B:

WHEN MONITORED
- With the ignition on
- Battery voltage between 10 and 16 volts
- IOD fuse installed
- FCM is configured correctly

SET CONDITION
Bus messages not received from the SCM (CAN B) for approximately 2 to 5 seconds.

POSSIBLE CAUSES
- CAN B BUS circuits open or shorted
- DTCs related to battery voltage, ignition, or VIN messages
- FCM not configured correctly
- Steering control module
- Steering control module power and ground
- Module that set this DTC

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.

Q: 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. Body Verification Test

2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCs
With the scan tool, read active DTCs from all modules.

NOTE: Check for FCM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.

Q: Does the scan tool display any active DTCs to the conditions listed above?

YES: Diagnose and repair the DTC.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 3

3. VERIFY THAT THE SCM IS ACTIVE ON THE BUS
Turn the ignition on.
With the scan tool, select Network Diagnostics.
Verify that the SCM is active on the bus.

Q: Is the SCM active on the bus?

YES: Go To 4
NO: Refer to Trouble Code Diagnostic Charts for a no response test procedure.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCs
With the scan tool, select Network Diagnostics.

Q: Is there more than one module with active DTCs "Logged Against" the SCM?

YES: Replace/update the Steering Control Module.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Replace/update the module that set this DTC.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test