Honda Accord: MICU Input Test - Exterior Lights - Body Electrical - Honda Accord MK8 2008-2012 Service ManualHonda 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


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


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


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


*: '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


*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


* : '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.

    DTC Troubleshooting
    DTC B10CF: Left Daytime Running Lights Circuit Malfunction NOTE: • Make sure the No. 15 (7.5 A) fuse in the driver's under-dash fuse/relay box is OK. • If you are troubleshooting mult ...

    Combination Light Switch Test/Replacement
    1. Remove the driver's dashboard lower cover (see page 20-166). 2. Remove the steering column covers (see page 17-10). 3. Disconnect the 12P connector (A) from the combination light switch (B). ...

    See also:

    Rear Door Sash Inner Trim Replacement
    4-door NOTE: Take care not to scratch the door. 1. Remove the door panel (see page 20-38). 2. Lower the glass fully. 3. Remove the door sash inner trim (A). -1. Pull back the outside edge ...

    Head Restraints
    Your vehicle is equipped with head restraints in all seating positions to help protect you and your passengers from the likelihood of whiplash and other injuries. They are most effective wh ...

    Symptom Troubleshooting
    Poor ASH or FM radio reception or interference NOTE: • Check the vehicle battery condition first (see page 22-90). • Check the connectors for poor connections or loose terminals. ...