Immobilizer System Symptom Troubleshooting - Immobilizer indicator blinks

NOTE:  Before troubleshooting, check the items listed in General Check before Troubleshooting.

• 1. Immobilizer system check:

  - 1. Turn the vehicle to the OFF (LOCK) mode.

  - 2. Connect the HDS to the data link connector (DLC) .

  - 3. Connect the HDS, then turn the vehicle to the ON mode.

  - 4. From the SYSTEM SELECTION MENU, enter IMMOBI, then select IMMOBILIZER SETUP.

  NOTE:  If the HDS does not communicate with the immobilizer-keyless control unit, check the power, ground, and K-line connections.

  Immobilizer - Information/Record Data/History Data - Immobilizer Information

  - 5. Select the SYSTEM CHECK from the IMMOBILIZER INFO.

  Is SYSTEM CHECK indicated?

  YES 

  Troubleshoot the immobilizer system according to the results of the SYSTEM CHECK .

  NO 

  Go to step 2.

• 2. Open wire check (GND line):

  - 1. Turn the vehicle to the OFF (LOCK) mode.

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

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

  Do the door lock actuators work normally?

  YES 

  The GND wire is OK. Go to step 3.

  NO 

  Repair an open or high resistance in the ground wire or poor ground (G502).

• 3. Open wire check (IG1 FUEL PUMP line):

  - 1. Turn the vehicle to the ON mode.

  - 2. Measure the voltage between test points 1 and 2.

  Test condition	Vehicle ON mode
  Test circuit	IG1 FUEL PUMP
  Test point 1	Immobilizer-keyless control unit 7P connector No. 6
  Test point 2	Body ground

  Is there battery voltage?

  YES 

  The IG1 FUEL PUMP wire is OK. Replace the immobilizer-keyless control unit .

  NO 

  Repair an open or high resistance in the wire.