Inspection Procedure

1. Select the ACTIVE TEST, use the intelligent tester (with CAN VIM) to generate a command, and then check that the security indicator light operation is normal.

   Transponder key ECU: 

   TRANSPONDER KEY ECU
   
   

   Item	Normal Condition	Diagnostic Note
   SECURITY INDIC	Security indicator light turns ON / OFF	-

   OK: Security indicator light turns ON / OFF. 

OK: Go to step   3 

NG: Go TO NEXT STEP. 

1. Disconnect the E46 ECU connector.
2. Disconnect the E22*1 or E23*2 light connector.
Fig 1: Identifying E46 ECU Connector And E22 Or E23 Light Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance of the wire harness side connectors.

   HINT:

   *1: for Manual air conditioning system

   *2: for Automatic air conditioning system

   Standard resistance: 

   for Manual Air Conditioning System 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   E46-8 (IND) - E22-8 (SEC)	Below 1 Ω
   E22-5 (GND) - Body ground
   E46-8 (IND) or E22-8 (SEC) - Body ground	10 kΩ or higher

   for Automatic Air Conditioning System 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   E46-8 (IND) - E23-10 (LP)	Below 1 Ω
   E23-7 (GND) - Body ground
   E46-8 (IND) or E23-10 (LP) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go TO NEXT STEP. 

1. Remove the transponder key ECU with its connectors still connected.
2. Measure the voltage of the ECU.
   Fig 2: Inspecting Transponder Key ECU (Output)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard voltage 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Condition	Condition	Specified Condition
   E46-8 (IND) - Body ground	Engine immobilizer system is set	10 to 14 V and below 1 V output alternately

NG: REPLACE TRANSPONDER KEY ECU 

OK: REPLACE CLOCK SUB-ASSEMBLY (for MANUAL AIR CONDITIONING SYSTEM), HEATER CONTROL PANEL (for AUTOMATIC AIR CONDITIONING SYSTEM)