Toyota RAV4 manuals

Toyota Sienna Service Manual: IG Power Source Circuit

DESCRIPTION

The main power source is supplied to the A/C amplifier when the ignition switch is turned to the ON position.

The power source is used for operating the A/C amplifier and servo motor, etc.

WIRING DIAGRAM

IG Power Source Circuit

INSPECTION PROCEDURE

HINT: Start the engine before inspection. Check the IG1 relay or battery if the engine does not start.

1 INSPECT FUSE (HTR)

(a) Remove the HTR fuse from the driver side junction block.

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

Standard resistance

2 INSPECT A/C AMPLIFIER (IG - GND)

INSPECT A/C AMPLIFIER (IG - GND)

(a) Remove the A/C amplifier with its connectors still connected.

(b) Turn the ignition switch to the ON position.

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

Standard voltage

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

3 CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - BATTERY)

3 CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - BATTERY)

(a) Disconnect the connector from the A/C amplifier.

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

Standard voltage

4 CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - BODY GROUND)

CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - BODY GROUND)

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

Standard resistance

REPLACE A/C AMPLIFIER

Rear Blower Motor Circuit
DESCRIPTION Power to the rear blower motor is supplied from the battery via the RR A/C relay. The rear blower motor speed level varies between 0 and 31 based on the voltage difference measured ...

ACC Power Source Circuit
DESCRIPTION This circuit supplies power to the A/C amplifier and the illumination for the clock. WIRING DIAGRAM INSPECTION PROCEDURE 1 INSPECT FUSE (ECU ACC) (a) Remove the ECU ACC fuse fr ...

Other materials:

Inspection
1. INSPECT TIRE PRESSURE WARNING RESET SWITCH (a) Remove the tire pressure warning reset switch. (b) Measure the resistance between terminals 1 and 2 of the tire pressure warning reset switch when the tire pressure warning switch is ON and OFF. Standard resistance If the result is not as ...

Removal
1. Remove front wheel 2. Remove front wiper arm head cap Hint: (see page ww-3) 3. Remove fr wiper arm rh HINT: (See page WW-3) 4. Remove fr wiper arm lh HINT: (See page WW-3) 5. Remove cowl top ventilator louver subassembly Hint: (see page ww-3) 6. Remove windshield wiper motor & li ...

Park / Neutral Position Switch Circuit
DESCRIPTION The clearance warning ECU receives the reverse or park position signal from the park / neutral position switch. WIRING DIAGRAM INSPECTION PROCEDURE 1 INSPECT CLEARANCE WARNING ECU Disconnect the C9 connector from the clearance warning ECU.  Measure the voltage ...

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