Keyless Access Control Unit

DTC Troubleshooting: U1283

DTC U1283:

Keyless Access Control Unit Lost Communication With Passenger's MICU

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A.

1. Clear the DTCs with the HDS.

2. Press the engine start/stop button to select the OFF, ACC, and ON mode.

3. Wait for at least 6 seconds.

4. Check for DTCs with the HDS.

Is DTC U1283 indicated?

YES -

Go to the passenger's MICU input test, and do all power, ground, and communication input tests. If the tests prove OK, replace the passenger's under-dash fuse/relay box Passengers Under-Dash Fuse/Relay Box (Passengers MICU) Removal and Installation.�

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections at passenger's under-dash fuse/relay box connector A (33P) and the related units.�