IG Power Source Circuit: Procedure

1. Remove the D-IG1-1 fuse from the main body ECU.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   D-IG1-1 fuse	Always	Below 1 Ω

NG → REPLACE FUSE 

OK: Go to next step 

1. Disconnect the L34 multiplex tilt and telescopic ECU connector.
   Fig 1: Checking Multiplex Tilt And Telescopic ECU (IG Terminal Voltage)

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

   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   L34-8 (IG) - L34-11 (GND)	Power switch ON (IG)	11 to 14 V

   RESULT
   
   

   Result	Proceed to
   Voltage value is outside the standard.	A
   Voltage value is within the standard.	B

B → See step   4 

A: Go to next step 

Fig 2: Checking Harness And Connector (Multiplex Tilt And Telescopic ECU - Main Body ECU, Body Ground)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the L34 multiplex tilt and telescopic ECU connector.
2. Disconnect the DA main body ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   L34-8 (IG) - DA-21	Always	Below 1 Ω
   L34-8 (IG) - Body ground	Always	10 kΩ or higher
   L34-11 (GND) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   5