Honda Civic. Manual — part 934

Is there continuity?

YES - Repair a short in the LOCK or UNLOCK wire.

NO - Go to step 12.

12. Check for continuity between the No. 23 (UNLOCK) and No. 24 (LOCK)

terminals of the under-dash fuse/relay box connector T (34P).

Fig. 15: Checking Continuity Between No. 23 And No. 24 Terminals Of
Under-Dash Fuse/Relay Box Connector T (34P)

Is there continuity?

YES - Repair a short in the wire between the LOCK wire and UNLOCK wire.

NO - Faulty MICU, replace the under-dash fuse/relay box.

SYMPTOM TROUBLESHOOTING

POWER DOOR LOCKS/KEYLESS

1. If the door lock system works properly, but the keyless operation does not,

refer to the immobilizer-keyless control unit symptom troubleshooting
information (see SYMPTOM TROUBLESHOOTING INFORMATION ).

Any of the doors is open.

Ignition key is in the ignition key switch.

NOTE:

The door lock system does not function when:

2008 Honda Civic LX

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

Ignition switch is ON (II).

SYMPTOM TROUBLESHOOTING CHART

No.

Symptom

Check Items

1 The doors will not lock or unlock.

(1)

MICU input test (see
MICU INPUT TEST )

Driver's door key
cylinder switch test (see
DOOR KEY
CYLINDER SWITCH
TEST )

Door lock switch test
(see DOOR LOCK
SWITCH TEST )

Door lock knob switch
test (see DOOR LOCK
KNOB SWITCH
TEST )

2 The doors will not lock.

(1)

MICU input test (see
MICU INPUT TEST )

Door lock knob switch
test (see DOOR LOCK
KNOB SWITCH
TEST )

Driver's door switch test
(check the door switch
ON/OFF information
with the HDS)

3

MICU input test (see
MICU INPUT TEST )

Door lock knob switch
test (see DOOR LOCK
KNOB SWITCH

2008 Honda Civic LX

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

KEYLESS OPERATION DOES NOT WORK (LOCK, UNLOCK, PANIC)

The doors will not unlock.

(1)

TEST )

Door switch test (check
the door switch ON/OFF
information with the
HDS)

4

KEYLESS OPERATION DOES NOT
WORK (LOCK, UNLOCK, PANIC).

5

DOORS WILL NOT UNLOCK WITH
THE TRANSMITTER, BUT WILL
UNLOCK WITH THE DOOR SWITCH.

6

DOORS WILL NOT LOCK WITH THE
TRANSMITTER, BUT WILL LOCK
WITH THE DOOR SWITCH.

7

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

8

THE HORN DOES NOT SOUND WHEN
PANIC BUTTON ON THE
TRANSMITTER PRESSED (USA
ONLY).

9

Keyless operation will work even though the
ignition key is in the ignition switch.

Ignition key switch test (see
IGNITION KEY SWITCH
TEST ).

(1)

If only one door is not working properly, check that door's lock actuator
first, then check the other items listed in this table.

NOTE:

Before troubleshooting, check the B-CAN DTCs. If any
DTC is indicated, troubleshoot the indicated DTC first.

Before troubleshooting, do the keyless transmitter test
(see TRANSMITTER TEST/REPLACEMENT ).

2008 Honda Civic LX

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

1. Turn the ignition switch ON (II).
2. Try to start the engine.

Does the engine start?

YES - The immobilizer system is OK, go to step 3.

NO - Go to the immobilizer symptom troubleshooting (see SYMPTOM
TROUBLESHOOTING ).

3. Turn the ignition switch OFF.
4. Connect the HDS to the data link connector.
5. Close all doors, then turn the ignition switch ON (II).
6. Enter the BODY ELECTRICAL menu, and check the door switch parameters.

Do all door switches indicate OFF?

YES - Go to step 6.

NO - Faulty door switch, or shorted door switch wire. Repair as necessary.

7. Remove the ignition key from the ignition switch.
8. Disconnect the immobilizer-keyless control unit 7P connector.
9. Check for voltage between the immobilizer-keyless control unit 7P connector

No. 1 terminal and body ground.

Fig. 16: Checking Voltage Between Immobilizer-Keyless Control Unit 7P
Connector No. 1 Terminal And Body Ground

2008 Honda Civic LX

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