DTC Troubleshooting: B1055, B1056, B1057, B1058, B1059, B1060, B1061, B1062, B1063

B1055:  Relay Control Module lost communication with MICU
B1056:  Relay Control Module lost communication with MICU
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)


1.Clear the DTCs using the Honda PGM Tester or the HDS.

2.Cycle the ignition switch OFF then ON.

3.Check for DTCs by selecting the DTCs MENU (DTCs) from the Honda PGM Tester or the HDS.

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


YES - Go to 4.


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


4.Check for DTCs other than those listed above.

Are any other DTCs present?


YES - Go to 5.


NO - Perform 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.n


Chart 1
ECU 
B1055 B1159  MICU 
B1056 B1255  
B1057 B1157  




Chart 2
ECU 
B1058 B1006  Door Multiplex Control Unit 
B1059 B1010  
 B1160  




Chart 3
ECU 
B1060 B1008 B1206 Gauge Control Module 
B1061 B1205 B1207 




Chart 4
ECU 
B1062 B1007 B1156 Combination Switch Control Unit 
B1063 B1009  
 B1155