B1062

DTC B1007: MICU Lost Communication with Combination Switch Control Unit (Headlight Switch Message)

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. Check for DTCs with the HDS.

Is DTC B1007 indicated?

YES - Go to step 4.

NO - Intermittent failure, the MICU is OK at this time. Check for loose or poor connection at combination switch control unit connector (8P), and at under-dash fuse/relay box connector X (39P). If the connections are good, check the battery condition and the charging system.

4. Check for DTCs with the HDS.

Are DTCs B1155 and B1062 indicated?

YES - Go to the Combination Switch Control Unit Input Test. Combination Switch Control Unit Input Test

NO - Check for an open in the communication circuit between the MICU and the combination switch control unit. If the circuit is OK, replace the MICU. If the circuit is bad, repair the open.

B1055: Relay Control Module lost communication with MICU

B1056: Relay Control Module lost communication with MICU (alarm)

B1057: Relay Control Module lost communication with MICU (door switch message)

B1058: Relay Control Module lost communication with Door Multiplex Control Unit (door lock switch message)

B1059: Relay Control Module lost communication with Door Multiplex Control Unit (panic message)

B1060: Relay Control Module lost communication with Gauge Control Module (VSP/NE message)

B1061: Relay Control Module lost communication with Gauge Control Module (A/T message)

B1062: Relay Control Module lost communication with Combination Switch Control Unit (headlight switch message)

B1063: Relay Control Module lost communication with Combination Switch Control Unit (wiper switch message)

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. Check for DTCs with the HDS.

Is DTC B1055, B1056, B1057, B1058, B1059, B1060, B1061, B1062 and/or B1063 indicated?

YES - Go to step 4.

NO - Intermittent failure, the communication line is OK at this time.

4. Check for DTCs other than those listed at previous step.

Are any other DTCs present?

YES - Go to step 5.

NO - Perform Relay Control Module Input Test. Relay Control Module Input Test




5. Find the chart that contains at least one retrieved DTC in column A and one retrieved DTC in column B. Perform the input test for the ECU Vested in that chart.

If no DTC from column B is found, then continue Relay Control Module Input Test.