B1059

DTC B1010: MICU Lost Communication (Panic Message) with the Door Multiplex Control Unit

1. Clear the DTCs using the HDS.
2. Cycle the ignition switch to OFF and then back ON.
3. Check for DTCs using the HDS.

Is DTC B1010 indicated?

YES - Go to step 4.

NO - Intermittent failure, the door multiplex control unit is OK at this time. Check for loose or poor connections. If the connections are good, check the battery condition and the charging system.

4. Check for DTCs of the relay control module using the HDS.

Is DTC B1059 indicated?

YES - Go to the Door Multiplex Control Unit Input Test.

NO - Check for an open, or a short to power or ground in the communication circuit between the MICU and the door multiplex control unit. If the circuit is OK, replace the MICU. If the circuit is bad, repair the open, or short to power or ground.

DTC Troubleshooting

B1055: Relay Control Module lost communication with MICU

1. Clear the DTCs using the Honda Diagnostic System (HDS).
2. Cycle the ignition switch OFF then ON.
3. Check for DTCs by selecting the DTCs MENU (DTCs) from the HDS.

Is DTC B1055, B1056, B1057, B1058, B1059, B 1060, B1061, B1062 and/or B1063 indicated?

YES - Go to step 4.

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

4. Check for DTCs other than those listed above. 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 listed in that chart.
If no DTC from column B is found then continue to Relay Control Module input test.