Inspection Procedure

READ VALUE OF DATA LIST (UNLOCK WARNING SWITCH)

Check the DATA LIST to ensure proper function of the door unlock detection switch.

BODY (Body ECU):

DATA LIST - BODY (BODY ECU)

Item	Measurement Item / Display (Range)	Normal Condition	Diagnostic Note
KEY UNLK WRN SW	Unlock warning switch signal /ON or OFF	ON: Key is in ignition key cylinder OFF: No key is in ignition key cylinder	-

OK: The display is as specified in the normal condition.

NG: GO TO step 2

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

INSPECT UNLOCK WARNING SWITCH ASSEMBLY

Remove the unlock warning switch assembly.
Measure the resistance according to the value(s) in the table below.
Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
1 - 2	Free	10 kΩ or higher
1 - 2	Pushed	Below 1 Ω

NG: REPLACE UNLOCK WARNING SWITCH ASSEMBLY

Fig 1: Inspecting Unlock Warning Switch Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step

CHECK WIRE HARNESS (UNLOCK WARNING SWITCH - INSTRUMENT PANEL J/B (BODY ECU))

Disconnect the unlock warning switch assembly connector.
Disconnect the instrument panel J/B connector.
Measure the resistance according to the value(s) in the table below.
Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
K4-2 - B4-21 (KSW)	Always	Below 1 Ω
K4-1 - Body ground	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 2: Identifying Unlock Warning Switch And Instrument Panel J/B Connector Terminals

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