Toyota RAV4 manuals

Toyota Sienna Service Manual: Rear Room Temperature Sensor Circuit

DESCRIPTION

This sensor detects the rear cabin temperature that is used as the basis for temperature control and sends a signal to the A/C amplifier.

WIRING DIAGRAM

Rear Room Temperature Sensor 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 column.

Result

2 INSPECT REAR A/C ROOM TEMPERATURE SENSOR

INSPECT REAR A/C ROOM TEMPERATURE SENSOR

(a) Remove the rear A/C room temperature sensor.

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

Standard resistance

NOTICE:

HINT: As the temperature increases, the resistance decreases (see the graph).

3 CHECK HARNESS AND CONNECTOR (REAR A/C ROOM TEMPERATURE SENSOR - A/C AMPLIFIER)

CHECK HARNESS AND CONNECTOR (REAR A/C ROOM TEMPERATURE SENSOR - A/C AMPLIFIER)

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

CHECK HARNESS AND CONNECTOR (REAR A/C ROOM TEMPERATURE SENSOR - A/C AMPLIFIER)

(b) Disconnect the connector from the rear A/C room temperature sensor.

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

Standard resistance

REPLACE A/C AMPLIFIER

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