Inspection Procedure

1. Remove the MPX-B, IGN fuses from the instrument panel J/B.
2. Remove the AM2 No.1 fuse from the fusible link block.
3. Measure the resistance of the fuses.

   Resistance: 

   Below 1 Ω 

NG : CHECK FOR SHORT IN ALL HARNESS AND CONNECTOR CONNECTED TO FUSE AND REPLACE FUSE 

OK : GO TO NEXT STEP 

1. Disconnect T9 ECU connector.
2. Measure the voltage according to the value(s) in the table below.

   Voltage 

   TRANSPONDER KEY ECU ASSEMBLY - BATTERY
   
   

   Tester Connection	Condition	Specified Condition
   T9-2 (IG) - Body ground	Ignition switch off	Below 1 V
   T9-2 (IG) - Body ground	Ignition switch on	10 to 14 V
   T9-1 (CPUB) - Body ground	Always	0 to 14 V

   Fig 1: Checking Harness And Connector (Transponder Key ECU Assembly - Battery)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK : GO TO NEXT STEP 

1. Measure the resistance according to the value(s) in the table below.

   Resistance 

   TRANSPONDER KEY ECU ASSEMBLY - BODY GROUND
   
   

   Tester Connection	Condition	Specified Condition
   T9-14 (GND) - Body ground	Always	Below 1 Ω

   Fig 2: Checking Harness And Connector (Transponder Key ECU Assembly - Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

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