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 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   T9-2 (IG2) - Body ground	Ignition switch off	Below 1 V
   T9-2 (IG2) - 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 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   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