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).

Drivers 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 F, Q, and R.

NOTE; AH connector views are wire side of female terminals.

CONNECTOR F (33P)

CONNECTOR Q (20P)

CONNECTOR R (24P)

*: A/T

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, turn the ignition switch to ON ( I I ) , 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, goto 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, E, G# 1 and H*2.

*1: LX, LX PZEV, LX-P, LX-P PZEV

*2: Except LX, LX PZEV, LX-P, LX-P PZEV

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

CONNECTOR A (33P)

CONNECTOR E (18P)

CONNECTOR G(16P) (LX, LX PZEV, LX-P, LX-P PZEV)

CONNECTOR H (38P) (Except LX, LX PZEV, LX-P)

*: '08-09 models

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

9. Reconnect the connectors to the passenger's under-dash fuse/relay box, 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.

* 1 : '08-09 models

*2: LX, LX PZEV, LX-P, LX-P PZEV

*3: Except LX, LX PZEV, LX-P, LX-P PZEV

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.