IG Power Source Circuit

DESCRIPTION

When the engine switch is turned on (IG), the IG power source circuit supplies positive voltage to the multiplex tilt & telescopic ECU.
The multiplex tilt & telescopic ECU also receives engine switch signals via this circuit.

WIRING DIAGRAM

INSPECTION PROCEDURE

1. INSPECT FUSE (ECU-IG RH)

1. Remove the ECU-IG RH fuse from the main body ECU RH (cowl side J/B RH).

2. Measure the resistance of the ECU-IG RH fuse.

   Standard resistance:

   Below 1 Ω
   

NG	REPLACE FUSE

OK

2. INSPECT MULTIPLEX TILT & TELESCOPIC ECU (IG TERMINAL VOLTAGE)

1. Disconnect the J28 connector from the multiplex tilt & telescopic ECU.

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

   Standard voltage:

   Tester connection (Terminal No.)	Condition	Specified value
   IG (J28-8) - GND (J28-11)	Engine switch on (IG)	10 to 14 V

OK	PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

NG

3. CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - BODY GROUND)

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

   Standard resistance:

   Tester connection (Terminal No.)	Condition	Specified value
   GND (J28-11) - Body ground	Always	Below 1 Ω

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4. CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - MAIN BODY ECU RH)

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

   Standard voltage:

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

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

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