Honda Accord: MICU Input Test

NOTE: • Before testing, troubleshoot the multiplex integrated control unit first, using B-CAN System Diagnosis Test Mode A {see page 22-134).

• Before testing, make sure the No. 15 (7.5 A) fuse In the driver's under-dash fuse/relay box is OK.

Driver's MICU

1. Turn the ignition switch to LOCK (0), and remove the driver's dashboard lower cover.

2. Disconnect driver's under-dash fuse/relay box connectors B, D. F Q. and R.

NOTE: All connector views are wire side of female terminals.

3. Inspect the connector and socket terminals to be sure they are all making good contact.

• If the terminals are bent, loose or corroded, repair them as necessary and recheck the system.

• If the terminals look OK, go to step 4.

4. With the connectors still disconnected, do these input tests at the following connectors.

• If any test indicates a problem, find and correct the cause, then recheck the system.

• If all the input tests prove OK, go to step 5.

5. Reconnect the connectors to the driver's under-dash fuse/relay box, and do these input tests at the following connector.

• If any test indicates a problem, find and correct the cause, then recheck the system.

• If all the input tests prove OK, go to step 6.

Passenger's MICU

6. Turn the ignition switch to LOCK (0), and remove the passenger's kick panel.

• 2-door (see page 20-105)

• 4-door (see page 20-107)

7. Disconnect passenger's under-dash fuse/relay box connectors A and E.

NOTE: All connector views are wire side of female terminals.

*: '08-09 models

8. With the connectors still disconnected, do these input tests at the following connectors.

• If any test indicates a problem, find and correct the cause, then recheck the system.

• If all the input tests prove OK, go to step 9.

*1: With automatic lighting

*2: Without automatic lighting

9. Reconnect the connectors to the passenger's under-dash fuse/relay box, and do these input tests at the following connector.

• If any test indicates problem, find and correct the cause, then recheck the system.

• If all input tests prove OK, go to step 10.

* : '08-09 models

10. If multiple failures are found on more than one control unit, replace the driver's under-dash fuse/relay box (includes the driver's MICU).

• USA models (see page 22-86) • Canada models (see page 22-87) If input failures are related to a particular control unit, replace the control unit.