Honda Civic. Manual — part 936

NO - Check the horn circuit.

3. Turn the headlight switch ON.

Do the headlights come on?

YES - Go to step 4.

NO - Check the lighting circuit.

4. Do the transmitter test (see TRANSMITTER TEST/REPLACEMENT ).

Is the transmitter OK?

YES - Substitute a known-good MICU and recheck.

NO - Replace the transmitter.

DOORS AUTOMATICALLY RELOCK AFTER BEING UNLOCKED WITH THE TRANSMITTER
EVEN THOUGH A DOOR HAS BEEN OPENED

1. Turn the ceiling light switch in DOOR position.
2. Turn the ignition switch ON (II).
3. Close all doors.
4. Watch the ceiling light and the door indicator on the gauge control module.

Does the ceiling light and door indicator go off?

YES - Go to step 5.

NO - Repair a short to ground in the wire between the MICU and door switch.

5. Open and close each door one at a time.
6. Watch the ceiling light and the door indicator on the gauge control module.

Does the ceiling light and door indicator come on when the door is open, and
go off when the door is closed?

2008 Honda Civic LX

2006-08 ACCESSORIES & EQUIPMENT Keyless/Power Door Locks/Security System - Civic (All Except Hybrid)

YES - Substitute a known-good MICU and recheck. If the symptom goes
away, replace the original MICU.

NO - Repair an open in the wire between the MICU and the door switch. If the
wire is OK, faulty the door switch, replace the door lock actuator assembly.

TRIPPED SENSOR HISTORY

The security system stores information on the last tripped sensor if the security
system has been violated. The information can be retrieved using the HDS.

To retrieve the last tripped sensor data:

1. Select HISTORY DATA from the security system test mode menu.
2. Select CURRENT DATA.
3. Confirm that the VIN matches the Vehicle then press the enter button.
4. Scroll through the data ist.

Sensors that were violated will indicate DETECT.

Sensors the were not violated will indicated NONE.

5. Inspect the DETECT circuit for:

Misadjusted or damaged switch.

Loose or corroded connections.

Intermittent short to ground.

MICU INPUT TEST

1. Before troubleshooting the keyless/poor door locks/security system,

troubleshoot the B-CAN System Diagnosis Test Mode A (see
TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE
A ).

2. Check the No. 10 (7.5 A) and No. 25 (20 A) fuses in the under-dash fuse/relay

box. If any fuse is blown, replace it and go to step 3.

3. Disconnect the under-dash fuse/relay box connectors E, F, G, M, N, Q, R, and

T.

2008 Honda Civic LX

2006-08 ACCESSORIES & EQUIPMENT Keyless/Power Door Locks/Security System - Civic (All Except Hybrid)

Fig. 21: Identifying Under-Dash Fuse/Relay Box Connector Terminals (1
Of 2)

NOTE:

All connector views are wire side of female terminals.

2008 Honda Civic LX

2006-08 ACCESSORIES & EQUIPMENT Keyless/Power Door Locks/Security System - Civic (All Except Hybrid)

Fig. 22: Identifying Under-Dash Fuse/Relay Box Connector Terminals (2
Of 2)

4. 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 5.

5. With the connector still disconnected, make these input tests at the appropriate

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.

2008 Honda Civic LX

2006-08 ACCESSORIES & EQUIPMENT Keyless/Power Door Locks/Security System - Civic (All Except Hybrid)