B1005

DTC Troubleshooting: B1005

DTC B1005:

MICU Lost Communication With Relay Control Module

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. Turn the ignition switch to LOCK (0), and then back to ON (II).

3. Wait for at least 6 seconds.

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 relay control module connector K (10P), and at driver's under-dash fuse/relay box connector D (17P). If the connections are good, check the battery condition Testing and Inspection and the charging system.�

5. Check for DTCs with the HDS.

Are DTCs B1158 and B1959 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, replace the MICU Under-Dash Fuse/Relay Box Removal and Installation. If the circuit is bad, repair the open.�