IG Power Source Circuit: Procedure

1. Remove the ECU-IG RH fuse from the cowl side J/B RH.
2. Check the continuity of the ECU-IG RH fuse.

   OK

   Continuity

NG → REPLACE FUSE 

OK: Go to next step 

1. Disconnect the K27 connector from the multiplex tilt & telescopic ECU.
   Fig 1: Identifying IG Terminal Voltage

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage according to the value(s) in the table below.

   Voltage

   Tester connection (Terminal No.)	Condition	Specified value
   IG (K27-8) - GND (K27-11)	Engine switch on (IG)	10 to 14 V

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

NG: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 2: Checking Multiplex Tilt & Telescopic ECU And Body Ground

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Resistance

   Tester connection (Terminal No.)	Condition	Specified value
   GND (K27-11) - 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: Checking Multiplex Tilt & Telescopic ECU And Cowl Side J/B RH

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Voltage

   Tester condition	Condition	Specified value
   DA-1 - Body ground	Engine switch on (IG)	10 to 14 V

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - COWL SIDE J/B RH) 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (COWL SIDE J/B RH - BATTERY)