Toyota RAV4 manuals

Toyota Sienna Service Manual: Back-up Power Source Circuit

DESCRIPTION

This is the back-up power source for the A/C amplifier. Power is supplied even when the ignition switch is off and is used for diagnostic trouble code memory, etc.

WIRING DIAGRAM

Back-up Power Source Circuit

INSPECTION PROCEDURE

1 INSPECT FUSE (ECU-B)

(a) Remove the ECU-B fuse from the engine room junction block.

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

Standard resistance

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

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

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

ACC Power Source Circuit
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Air conditioning system (for manual air conditioning system)
...

Other materials:

Removal
1. REMOVE FRONT WHEELS 2. REMOVE ENGINE UNDER COVER NO.1 3. DRAIN AUTOMATIC TRANSAXLE FLUID (a) Remove the drain plug, gasket and drain ATF. (b) Install a new gasket and the drain plug. Torque: 49 N*m (500 kgf*cm, 36 ft.*lbf) 4. REMOVE FRONT DRIVE SHAFT ASSEMBLY LH HINT: (See page DS-6) ...

Room light assembly
ON-VEHICLE INSPECTION 1. ROOM LIGHT ASSEMBLY NO.2  Check that the resistance exists between the terminals. Resistance: Below 1 Ω 2. INTERIOR DOME LIGHT SWITCH ASSEMBLY  Check that there is resistance between the terminals at each switch position as shown in the cha ...

Reassembly
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