U0146
U0146-LOST COMMUNICATION WITH CENTRAL GATEWAY
For a complete wiring diagram, refer to the Wiring Information.
- When Monitored:
- With the ignition on
- Battery voltage between 10 and 16 volts
- IOD fuse installed
- Set Condition:
If the Anti-Lock Brake Module either fails to receive bus messages from the Totally Integrated Control Module (TIPM) for approximately 500 ms, or it receives invalid messages from the TIPM, or it detects messages from the TIPM are of improper data length.
1. VERIFY DTC IS ACTIVE
NOTE: Verify 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 ABS DTCs.
3. With the scan tool, read and record Environmental Data to help identify the conditions in which the DTC was set.
4. With the scan tool, erase ABS DTCs.
5. Cycle the ignition switch.
6. With the scan tool, read ABS DTCs.
Does this DTC reset?
Yes
- Go To 2
No
- Perform the Stored Lost Communication test 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
- Perform the appropriate diagnostic procedure.
No
- Go To 3
3. VERIFY THAT THE TIPM IS ACTIVE ON THE BUS
1. With the scan tool, select ECU View.
2. Verify that the TIPM is active on the bus.
Is the TIPM active on the bus?
Yes
- Go To 4
No
- For No Response diagnostic procedures Manufacturer Code Charts.
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 TIPM?
Yes
- Replace/update the TIPM.
- Perform BODY VERIFICATION TEST Body Verification Test.
No
- Replace the Anti-Lock Brake Module.
- Perform ABS VERIFICATION TEST ABS Verification Test.