B1005

DTC B1005: MICU Lost Communication with the Relay Control Module

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

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Wait for 6 seconds or more.
4. Check for DTCs with the HDS.

Is DTC B1005 indicated?

YES - Go to step 5.

NO - Intermittent failure, the relay control module is OK at this time. Check for loose or poor connection at the relay control module connector J (10P), and at the under-dash fuse/relay box connector D (17P). If the connections are good, check the battery condition and the charging system.

5. Check for DTCs with the HDS.

Is DTC B1158 also indicated?

YES - Go to Relay Control Module Input Test. Relay Control Module Input Test

NO - Check for an open in the communication circuit between the MICU and the relay control module. If the circuit is OK, the MICU is faulty; replace the under-dash fuse/relay box. If the circuit is bad, repair the open.