Inspection Procedure

HINT:

Start the inspection from step 1 when using the hand-held tester and start from step 2 when not using the hand-held tester.

1. READ VALUE OF HAND-HELD TESTER (TRANSPONDER KEY ECU (SWITCH CONDITION)) 
   1. Connect the hand-held tester to the DLC3.
   2. Turn the ignition switch ON with the key that will not start the engine.
   3. Select the item "KEY SW" on the hand-held tester.

      OK: 

      • OFF -> Key is in IG key cylinder 
      • ON -> No key is in IG key cylinder 

      OK: REPLACE TRANSPONDER KEY ECU ASSY 

      NG: Go to next step 

2. INSPECT UN-LOCK WARNING SWITCH ASSY 
   1. Remove the un-lock warning switch.
   2. Inspect the un-lock warning switch continuity.

   Standard: 

   UN-LOCK WARNING SWITCH ASSY
   
   

   Terminal No.	Condition	Specified Condition
   1 <==> 2	Switch pushed (Key set)	Continuity
   	Switch free (Key removed)	No continuity

   Fig 1: Inspecting Un-Lock Warning Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE UN-LOCK WARNING SWITCH ASSY 

   OK: Go to next step 

3. CHECK WIRE HARNESS (TRANSPONDER KEY ECU ASSY <==> UN-LOCK WARNING SWITCH ASSY) 
   Fig 2: Checking Wire Harness (Transponder key ECU Assy <==> Un-Lock Warning Switch Assy)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Disconnect the T11 ECU and U1 switch connector.
   2. Check the continuity between the wire harness side connectors.

      Standard (TMC Made): 

   TRANSPONDER KEY ECU ASSY <==> UN-LOCK WARNING SWITCH ASSY (TMC MADE)
   
   

   Symbols (Terminal No.)	Specified Condition
   KSW (T11-3) <==> - (U1-2)	Continuity

   Standard (TMMK Made): 

   TRANSPONDER KEY ECU ASSY <==> UN-LOCK WARNING SWITCH ASSY (TMMK MADE)
   
   

   Symbols (Terminal No.)	Specified Condition
   KSW (T11-10) <==> - (U1-2)	Continuity

   NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

   OK: REPLACE TRANSPONDER KEY ECU ASSY