• HEADINGS
  • Removal and Installation
    • Removal
    • Installation
  • DTC Troubleshooting
    • 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)
• FIGURES
  • Fig. 1: Identifying Screws And Mounting Bolts
• TABLES
  • DTC TROUBLESHOOTING CHART 1
  • DTC TROUBLESHOOTING CHART 2
  • DTC TROUBLESHOOTING CHART 3
  • DTC TROUBLESHOOTING CHART 4

2004-08 ELECTRICAL

Under-Hood Fuse/Relay Box - TSX

Removal and Installation

Removal

1. Make sure you have the anti-theft codes for the audio system and the navigation system (if equipped), then write down the audio presets.
2. Disconnect the negative battery cable, then disconnect the positive cable, and wait at least 3 minutes.
3. Remove the under-hood multi-relay box from the under-hood fuse/relay box.
4. Remove the screws (A) from the alternator and battery cable terminals.

   Fig. 1: Identifying Screws And Mounting Bolts
   Courtesy of AMERICAN HONDA MOTOR CO., INC.

5. Remove the two mounting bolts (B) from the under-hood fuse/relay box.
6. Remove the under cover from the under-hood fuse/ relay box.
7. Disconnect the connectors from the under-hood fuse/relay box.
8. If replacing the fuse/relay box, carefully remove the relays by prying under the base of the relay.

   NOTE:

   Do not use pliers, they will damage the relays.

Installation

1. Install the relays and connect the connectors to the under-hood fuse/relay box, then install the under-hood fuse/relay box in the reverse order of removal.
2. Install the removed parts in the reverse order of removal.
3. Connect the positive cable to the battery, then connect negative cable to the battery.
4. Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE ).
5. Do the power window control unit reset procedure (see RESETTING THE POWER WINDOW ).
6. Enter the anti-theft codes for the audio system and navigation system (if equipped), then enter the audio presets. Set the clock (on vehicles without navigation).
7. Confirm that all systems work properly.

DTC Troubleshooting

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 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, B1060, B1061, B1062 and/or B1063 indicated?

   YES -Go to step 4.

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

4. Check for DTCs other than those listed.

   Are any other DTCs present?

   YES -Go to step 5.

   NO -Perform Relay Control Module Input Test (see 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.

   Chart 1

   DTC TROUBLESHOOTING CHART 1
   

   A	B		ECU
   B1055	B1005	B1159	MICU (see MICU INPUT TEST )
   B1056	B1006	B1255
   B1057	B1157	B1806 B1807

   Chart 2

   DTC TROUBLESHOOTING CHART 2
   

   A	B	ECU
   B1058	B1006	Door Multiplex Control Unit (see DOOR MULTIPLEX CONTROL UNIT INPUT TEST )
   B1059	B1010 B1160

   Chart 3

   DTC TROUBLESHOOTING CHART 3
   

   A	B		ECU
   B1060	B1008	B1206	Gauge Control Module (see GAUGE CONTROL MODULE INPUT TEST )
   B1061	B1205	B1207
   	B1805	B1808

   Chart 4

   DTC TROUBLESHOOTING CHART 4
   

   A	B		ECU
   B1062	B1007	B1156	Combination Switch Control Unit (see COMBINATION SWITCH CONTROL UNIT INPUT TEST )
   B1063	B1155