Inspection Procedure

WARNING: This page is about a different car, the 2005 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

In case of using the hand-held tester, start the inspection from step 1 and in case of not using the hand-held tester, start from step 2.

Check theft deterrent horn using hand-held tester.
PREPARATION:

Connect the hand-held tester to the DLC 3.

CHECK:

Check that the key unlock warning switch signals in DATA LIST.
1. OK: Proceed to next circuit inspection shown on problem symptoms table (See PROBLEM SYMPTOMS TABLE ).
2. NG: Go to Next Step.

Check key unlock warning switch.

PREPARATION:

Disconnect key unlock warning switch connector.

CHECK:

Check continuity between terminal 1 and 2 of key unlock warning switch connector while the key is inserted into the key cylinder or removed.

OK:

TESTER CONNECTION AND SPECIFIED CONDITION

Switch position	Tester connection	Specified condition
ON (Key inserted)	1 - 2	Continuity
OFF (Key removed)	-	No continuity

Fig 1: Checking Key Unlock Warning Switch

NG: Replace key unlock warning switch.
OK: Go to Next Step.

Check harness and connectors between ECU and key unlock warning switch, key unlock warning switch and body ground (See PROCEDURE ).
1. NG: Repair or replace harness or connector.
2. OK: Check and replace theft deterrent ECU.*1
  *1: When there is a malfunction that the theft deterrent system cannot be set, proceed to the next numbered circuit inspection shown in problem symptom table (See PROBLEM SYMPTOMS TABLE ).