Honda Accord: Symptom Troubleshooting - Immobilizer System - Body Electrical - Honda Accord MK8 2008-2012 Service ManualHonda Accord: Symptom Troubleshooting

Immobilizer Indicator blinks

NOTE; Before troubleshooting, check the Items listed In "General Check before Troubleshooting".

1. Turn the ignition switch to LOCK (0).

2. Connect the HDS, then turn the ignition switch to ON .


3. From the main menu, enter IMMOBI, select the IMMOBILIZER SETUP, then select System check, Number of keys, and Status Log.

4. Select the SYSTEM CHECK.

Is the SYSTEM CHECK indicated? YES

-Troubleshoot the immobilizer system according to the result of the SYSTEM CHECK (see page 22-4S4/.

NO

-Go to step 5.

5. Turn the ignition switch to LOCK (0).

6. Enter the vehicle, and remove the ignition key from the ignition switch, then close the all doors.

7. Operate the keyless transmitter LOCK and UNLOCK several times in the vehicle.

Do the door lock actuators work normally? YES

-Go to step 8.

NO-

Check for a poor ground and/or an open in the wire between immobilizer-keyless control unit 7P connector terminal No. 7 and body ground (G101) .

8. Turn the ignition switch to ON (II).

9. Back-probe and measure the voltage between immobilizer-keyless control unit 7P connector terminal No. 2 and body ground.

IMMOBILIZER-KEYLESS CONTROL UNIT 7P CONNECTOR

Wire side of female terminals


Wire side of female terminals

Is there battery voltage? YES

-Go to step 10.

NO

-Check for a blown No. 9 (20 A) fuse in the driver's under-dash fuse/relay box. If the fuse is OK, repair open in the YEL wire between the driver's under-dash fuse/relay box and the immobilizer-keyless control unit.

10. Back-probe and measure the voltage between immobilizer-keyless control unit 7P connector terminal No. 7 and body ground.

IMMOBILIZER-KEYLESS CONTROL UNIT 7P CONNECTOR

Wire side of female terminals


Wire side of female terminals

Is there less than 0.2 V? YES

-Repair poor connection or an open or high resistance between immobilizer-keyless control unit 7P connector terminal No. 7 and G101 . NO

-Replace the immobilizer-keyless control unit (see page 22-440).

Engine does not start with the immobilizer key

NOTE: Before troubleshooting, check the items listed in "General Check before Troubleshooting" (see page 22-429).

1. Try to start the engine.

Does the engine start? YES

-lntermittent failure, the vehicle is OK at this time.

Check status log (see page 22-436) and check the line indicated in the table.

NO

-Go to step 2.

2. Turn the ignition switch to LOCK (0). 3. Turn the ignition switch to ON (II), and check the immobilizer indicator.

Does the indicator blink once, then stay off? YES

-Go to step 4.

NO

-Go to the immobilizer indicator blinks troubleshooting (see page 22-432).

4. Turn the ignition switch to START (III).

Does the starter motor run? YES

-Go to step 5.

NO

-Go to Starting System, and check the starter motor (see page 4-10).

5. Try to start the engine with the immobilizer key.

Does the engine start? YES

-Go to step 6.

NO

-Go to the PGM-FI System Symptom Troubleshooting (see page 11-14).

6. Wait for a few minutes with the engine running.

Does the engine stop? YES

-Go to the PGM-FI System Symptom Troubleshooting (see page 11-14).

NO

-The system is OK at this t i m e.

Immobilizer indicator does not go off

1. Turn the ignition switch to LOCK (0).

2. Connect the HDS to the data link connector.

3. Turn the ignition switch to ON (II).

4. From the main menu, enter IMMOBI, then select IMMOBILIZER SET UP, then select System Check, Number of Keys, and Status Log.

5. Do the SYSTEM CHECK with the HDS.

lsN-1 OK indicated? YES

-Replace the gauge control module (see page 22-351 ) . NO

-Substitute a known-good immobilizer-keyless control unit, then register it and recheck. If the symptom goes away, replace the original immobilizer-keyless control units (see page 22-440).

    Symptom Troubleshooting Index
    1. Troubleshoot the Immobilizer system in the order shown: ...

    System Check
    1. Connect the HDS to the data link connector. 2. Turn the ignition switch to ON (II). 3. Monitor the SYSTEM CHECK in the IMMOBILIZER INFO with the HDS. 4. If the HDS displays NORMAL N-1,the ...

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