Inspection Procedure

Inspect key unlock warning switch.
CHECK:

Check the continuity between the terminals.

OK:

Fig 1: Switch Position & Terminals Continuity Specifications
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: View Of Key Unlock Warning Switch
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Replace key unlock warning switch.
2. 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.
  
  Fig 3: Terminals Continuity Specifications
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the U1 key unlock warning switch connector.
CHECK:

Check the continuity between the wire harness side connectors.

OK:

Fig 4: View Of T12 TVIP ECU Connector & U1 Key Unlock Warning Switch Connector Terminals
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.

Fig 5: Terminals Continuity Specifications
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK:

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

OK:

Fig 6: View Of U1 Key Unlock Warning Switch Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Repair or replace harness and connector.
2. OK: Go to Next Step.
Replace TVIP ECU.