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).

Driver's MICU

1. Turn the ignition switch to LOCK (0), and remove the driver's dashboard lower cover (see page 20-166).

2. Disconnect driver's under-dash fuse/relay box connectors N, P, 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.

*1: With premium audio system

*2: With HandsFreeLink

*1: With premium audio system

*2: With HandsFreeLink

5. Reconnect the connectors to the driver's under-dash fuse/relay box, turn the ignition switch to ON (II), and 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 6.

NOTE: These are power and ground tests for the multiplex integrated control unit.

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. 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 9.

9. Reconnect the connectors to the passenger's under-dash fuse/relay box, turn the Ignition switch to ON (II), and 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 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.