Toyota RAV4 manuals

Toyota Sienna Service Manual: 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 between the terminals of the motor.

The voltage difference measured between the terminals of the rear blower motor changes in proportion to the control at the rear blower motor controller on the ground side.

WIRING DIAGRAM

Rear Blower Motor Circuit

INSPECTION PROCEDURE

1 READ VALUE OF INTELLIGENT TESTER

(a) Connect the intelligent tester to the DLC3.

(b) Turn the ignition switch to the ON position and turn the intelligent tester main switch on.

(c) Select the item below in the DATA LIST, and read the display on the intelligent tester.

DATA LIST / AIR CONDITIONER

OK: The display is as specified in the normal condition.

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

2 INSPECT REAR BLOWER MOTOR

INSPECT REAR BLOWER MOTOR

(a) Remove the rear blower motor with the connector still connected.

(b) Disconnect the connector from the rear blower motor.

(c) Connect the positive (+) lead to terminal 1 of the rear blower motor connector, and the negative (-) lead to terminal 2.

OK: The rear blower motor operates smoothly.

3 CHECK HARNESS AND CONNECTOR (REAR BLOWER MOTOR - BATTERY)

CHECK HARNESS AND CONNECTOR (REAR BLOWER MOTOR - BATTERY)

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

Standard voltage

4 CHECK HARNESS AND CONNECTOR (REAR BLOWER MOTOR CONTROLLER - BODY GROUND)

CHECK HARNESS AND CONNECTOR (REAR BLOWER MOTOR CONTROLLER - BODY

(a) Disconnect the connector from the rear blower motor controller.

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

Standard resistance

5 CHECK HARNESS AND CONNECTOR (REAR BLOWER MOTOR - REAR BLOWER MOTOR CONTROLLER)

CHECK HARNESS AND CONNECTOR (REAR BLOWER MOTOR - REAR BLOWER MOTOR CONTROLLER)

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

Standard resistance

6 CHECK HARNESS AND CONNECTOR (REAR BLOWER MOTOR CONTROLLER - A/C AMPLIFIER)

CHECK HARNESS AND CONNECTOR (REAR BLOWER MOTOR CONTROLLER - A/C AMPLIFIER)

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

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

7 INSPECT REAR BLOWER MOTOR CONTROLLER

INSPECT REAR BLOWER MOTOR CONTROLLER

(a) Disconnect the connector from the rear blower motor controller.

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

Standard resistance

INSPECT REAR BLOWER MOTOR CONTROLLER

(c) Connect the positive (+) lead to terminal 3 through a 12 V 3.4 W test bulb, and the negative (-) lead to terminal 1.

(d) Connect the three 1.5 V dry cell batteries' positive (+) lead to terminal 2, and the negative (-) lead to terminal 1.

Then check that the test bulb comes on.

OK: The test bulb comes on.

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

Rear Air Conditioning Relay Circuit
DESCRIPTION The RR A/C relay is switched on by signals from the A/C amplifier. It supplies power to the rear blower motor. WIRING DIAGRAM INSPECTION PROCEDURE 1 INSPECT RELAY (RR A/C) ...

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 moto ...

Other materials:

Adjustment
HINT: On the RH side, use the same procedures as on the LH side. Since a centering bolt is used as door hinge mounting bolts on the body side and the door side, the door cannot be adjusted with them on. Substitute a bolt with a washer for the centering bolt. 1. INSPECT BACK DOOR PAN ...

Terminals of ECU
1. CHECK TRANSPONDER KEY AMPLIFIER Disconnect the I14 amplifier connector and measure the resistance between the terminal of the wire harness side connector and body ground. If the result is not as specified, there may be a malfunction on the wire harness side.  Reconnec ...

Data list / active test
HINT: By accessing the DATA LIST displayed on the intelligent tester, you can perform such functions as reading the values of switches and sensors without removing any parts. Reading the DATA LIST as the first step in troubleshooting is one method to shorten labor time. 1. DATA LIST FOR CENTER ...

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