NOTE As the temperature increases the voltage decreases

OK: Proceed to next circuit inspection shown on problem symptoms table (See page DM 087). However, if DTC 12 is displayed, check and replace integration control and panel.

2. Check ambient temperature sensor. PREPARATION:

Disconnect ambient temperature sensor connector. CHECK:

Measure resistance between terminals 1 and 2 of ambient temperature sensor connector at each temperature.

Resistance:

at25°C(77°F): 1.6- 1.8 kohm at 50°C(122°F): 0.5 - 0.7 kohm

2004 ACCESSORIES & EQUIPMENT Air Conditioning System - Diagnostics - Sequoia

Ambient Temperature Corolla
Fig. 32: Measuring Resistance Between Terminals Of Ambient Temperature Sensor Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NOTE: As the temperature increases, the resistance decreases.

NOTE: When installing the ambient temperature sensor, be sure to connect the sensor connector before connecting the battery.

2004 ACCESSORIES & EQUIPMENT Air Conditioning System - Diagnostics - Sequoia

NG: Replace ambient temperature sensor. OK: Go to next step.

3. Check harness and connector between ambient temperature sensor and integration control and panel (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).

NG: Repair or replace harness or connector.

OK: Check and replace integration control and panel.

DTC 13: FRONT EVAPORATOR TEMPERATURE SENSOR CIRCUIT

CIRCUIT DESCRIPTION

This sensor detects the temperature inside the cooling unit and sends the appropriate signals to the integration control and panel.

DTC No

Detection Item

Trouble Area

13

Open or short in front evaporator temperature sensor circuit.

• Front evaporator temp, sensor

• Harness or connector between front evaporator temp sensor and integration control and panot

• Integration control and panel

GOM221JM

GOM221JM

Fig. 33: DTC Table

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. WIRING DIAGRAM

2004 ACCESSORIES & EQUIPMENT Air Conditioning System - Diagnostics - Sequoia

Toyota Aircon Termal Sensor
Fig. 34: Wiring Diagram - Front Evaporator Temperature Sensor Circuit Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. Check voltage between terminals TE and SG-2 of integration control and panel. PREPARATION:

Remove integration control and panel with connectors still connected. CHECK:

a. Turn ignition switch to ON.

b. Measure voltage between terminals TE and SG-2 of integration control and panel connector at each temperature.

2004 ACCESSORIES & EQUIPMENT Air Conditioning System - Diagnostics - Sequoia

Hilux 1kz Engine Wiring Harness

Fig. 35: Measuring Voltage Between Terminals TE & SG-2 Of Integration Control & Panel Connector

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 35: Measuring Voltage Between Terminals TE & SG-2 Of Integration Control & Panel Connector

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Voltage:

at 0°C (32°F): 2.0 - 2.4 V at 15°C(59°F): 1.4- 1.8 V

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  • martin ehrlichmann
    How to evaporator temperature sensor?
    8 years ago

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