U0146
U0146-LOST COMMUNICATION WITH CENTRAL GATEWAY
For a complete wiring diagram, refer to the Wiring Information. Electrical Diagrams
- When Monitored:
- With the ignition on
- Battery voltage between 10 and 16 volts
- Ignition Off Draw (IOD) fused installed.
- Set Condition:
If the Automatic Sway-Bar System Module either fails to receive bus messages from the Engine Control Module (ECM) for approximately 500 ms, or it receives invalid messages from the ECM, or it detects messages from the ECM are of improper data length.
1. VERIFY DTC IS ACTIVE
NOTE: Make sure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.
1. Turn the ignition on.
2. With the scan tool, read and record ASBS DTCs.
3. With the scan tool, read and record Environmental Data (EV Data).
4. With the scan tool, erase ASBS DTCs.
5. Cycle the ignition switch.
6. With the scan tool, read ASBS DTCs.
Does this DTC reset?
Yes
- Go To 2
No
- Perform the Stored Lost Communication DTCs diagnostic procedure. Stored Lost Communication DTCs
2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCs
1. With the scan tool, read all active DTCs from all CAN C Bus modules.
NOTE: Check for CAN C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.
Does the scan tool display any active DTCs related to the conditions listed above?
Yes
- Go to and perform the appropriate diagnostic procedure.
No
- Go To 3
3. VERIFY THAT THE ECM IS ACTIVE ON THE BUS
1. With the scan tool, select ECU View.
2. Verify that the ECM is active on the bus.
Is the ECM active on the bus?
Yes
- Go To 4
No
- Perform the No Response from ECM diagnostic procedure.
4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCs
1. With the scan tool, select Network View and select Advanced.
Is there more than one module with active DTCs "Logged Against" the ECM?
Yes
- Replace/update the ECM.
- Perform the ECM VERIFICATION TEST.
No
- Replace and program the Final Drive Control Module.
- Perform the ASBS VERIFICATION TEST. ASBS Verification Test.