Inspection Procedure

HINT:

Start the inspection from step 1 when using the intelligent tester and start from step 2 when not using the intelligent tester.

READ VALUE ON INTELLIGENT TESTER (UNLOCK WARNING SWITCH)

Connect the intelligent tester to the DLC3.
Turn the ignition switch on (IG) and turn the intelligent tester main switch on.

Select the items below in the "DATA LIST" and read the display on the intelligent tester.

BODY DATA LIST

Item	Measurement Item/Display (Range)	Normal Condition	Diagnostic Note
KEY UNLK WRN SW	Unlock warning switch/ON or OFF	ON: Ignition key inserted OFF: Ignition key is not inserted	-

OK:

When the ignition switch is operated, the display changes as shown above.

NG: Go to step 2

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

INSPECT MULTIPLEX NETWORK BODY ECU (KSW TERMINAL)

Turn the ignition switch off.
Disconnect the multiplex network body ECU (D7) connector.

Fig 1: Disconnecting Multiplex Network Body ECU (D7) Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Measure the resistance according to the value(s) in the table below.

RESISTANCE SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
D7-21 (KSW) - Body ground	Ignition key is inserted	Below 1
D7-21 (KSW) - Body ground	Ignition key is not inserted	10 k or higher

NG: Go to step 3

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

INSPECT UNLOCK WARNING SWITCH

Disconnect the unlock warning switch connector.

Fig 2: Inspecting Unlock Warning Switch
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Measure the resistance according to the value(s) in the table below.

RESISTANCE SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
D31-1 - D31-2	Switch pushed (Ignition key is inserted)	Below 1
D31-1 - D31-2	Switch released (Ignition key is not inserted)	10 k or higher

NG: REPLACE UNLOCK WARNING SWITCH

OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (BETWEEN BODY ECU, BODY GROUND - UNLOCK WARNING SWITCH)