IG Power Source Circuit: Procedure

1. Remove the ECU-IG RH fuse from the main body ECU RH (cowl side junction block RH).
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   ECU-IG RH fuse	Always	Below 1 Ω

NG → REPLACE FUSE 

OK: Go to next step 

1. Disconnect the J28 connector from the multiplex tilt and telescopic ECU.
   Fig 1: Identifying J28 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Multiplex Tilt and Telescopic ECU)

2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   J28-8 (IG) - J28-11 (GND)	Engine switch on (IG)	11 to 14 V

NG → See step   3 

OK → See step   5 

1. Measure the resistance according to the value(s) in the table below.
   Fig 2: Identifying J28 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Multiplex Tilt and Telescopic ECU)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J28-11 (GND) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Measure the voltage according to the value(s) in the table below.
   Fig 3: Identifying RA Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *1	Component with harness connected (Main Body ECU RH (Cowl Side Junction Block RH))

   Standard Voltage

   Tester Condition	Switch Condition	Specified Condition
   RA-1 - Body ground	Engine switch on (IG)	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH) - BATTERY) 

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - MAIN BODY ECU RH)