Inspection Procedure

Inspect key unlock warning switch.

CHECK:

Check the continuity between the terminals.

Fig 1: Inspecting Key Unlock Warning Switch

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OK:

KEY UNLOCK WARNING SWITCH

Switch Position	Tester Connection	Specified Condition
Switch free (Key removed)	1 - 2	No continuity
Switch pushed (Key inserted)	1 - 2	Continuity

NG : Replace key unlock warning switch.
OK : Go to next step

Check harness and connector between TVIP ECU and key unlock warning switch.
PREPARATION:
1. Disconnect the T12 TVIP ECU connector.
2. Disconnect the U1 key unlock warning switch connector.
CHECK:

Check the continuity between the wire harness side connectors.

Fig 2: Checking Harness And Connector Between TVIP ECU And Key Unlock Warning Switch
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK:

Fig 3: TVIP ECU And Key Unlock Warning Switch Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG : Repair or replace harness and connector.
2. OK : Go to next step.
Check harness and connector between key unlock warning switch and body ground.
PREPARATION:

Disconnect the U1 key unlock warning switch connector.

CHECK:

Check the continuity between the U1 key unlock warning switch wire harness side connector and body ground.

Fig 4: Checking Harness And Connector Between Key Unlock Warning Switch And Body Ground
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK:

Fig 5: Key Unlock Warning Switch And Body Ground Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG : Repair or replace harness and connector.
2. OK : Replace TVIP ECU.