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
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ACC Power Source Circuit
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Other materials:

Removal
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ABS Warning Light Remains ON
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Removal
1. REMOVE TRANSFER CASE NO.1 PLUG (See page TF-8) 2. REMOVE TRANSFER DRAIN PLUG (a) Remove the transfer drain plug, drain gasket and bleed transfer oil. 3. REMOVE EXHAUST PIPE ASSEMBLY HINT: (See page EX-8) 4. REMOVE PROPELLER WITH CENTER BEARING SHAFT ASSEMBLY HINT: (See page PR-3) 5. R ...

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