Toyota RAV4 manuals

Toyota Sienna Service Manual: Rear evaporator temperature sensor circuit

DESCRIPTION

The rear evaporator temperature sensor is installed on the rear evaporator. It detects the rear evaporator temperature. The sensor sends a signal to the A/C amplifier. The resistance of the rear evaporator temperature sensor changes in accordance with the rear evaporator temperature. As the temperature decreases, the resistance increases. As the temperature increases, the resistance decreases.

The A/C amplifier applies voltage (5 V) to the rear evaporator temperature sensor and reads voltage changes as the resistance of the rear evaporator temperature sensor changes.

WIRING DIAGRAM

Rear evaporator 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 EVAPORATOR TEMPERATURE SENSOR

INSPECT REAR EVAPORATOR TEMPERATURE SENSOR

(a) Remove the rear evaporator temperature sensor.

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

INSPECT REAR EVAPORATOR TEMPERATURE SENSOR

Standard resistance

NOTICE:

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

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

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

(a) Disconnect the rear evaporator temperature sensor connector.

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

(b) Disconnect the A/C amplifier connector.

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

Standard resistance

REPLACE A/C AMPLIFIER

Evaporator temperature sensor circuit
DESCRIPTION The evaporator temperature sensor (A/C thermistor) is installed on the evaporator in the air conditioning unit. It detects the temperature of the cooled air that has passed through the ...

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 INSPECTION PROCEDURE 1 R ...

Other materials:

Diagnosis Circuit
DESCRIPTION DTC output mode is set by connecting terminals TC and CG of the DLC3. DTCs are displayed by blinking the SRS warning light. HINT:  When each warning light stays blinking, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in each ECU is ...

Transmission Range Sensor Circuit Malfunction (PRNDL Input)
DESCRIPTION The park/neutral position switch detects the shift lever position and sends signals to the ECM. MONITOR DESCRIPTION These DTCs indicate a problem with the park/neutral position switch and the wire harness in the park/ neutral position switch circuit. The park/neutral po ...

Short in Curtain Shield Squib RH Circuit
DTC B1160/83 Short in Curtain Shield Squib RH Circuit DESCRIPTION The curtain shield squib RH circuit consists of the center airbag sensor assembly and the curtain shield airbag assembly RH. The circuit instructs the SRS to deploy when deployment conditions are met. DTC B1160/83 is record ...

В© 2011-2019 Copyright www.tsienna.net