Toyota Sequoia Limited

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2004 ACCESSORIES & EQUIPMENT Air Conditioning System - Diagnostics - Sequoia

OK: Check and replace integration control and panel. DTC 14: ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT

CIRCUIT DESCRIPTION

This sensor detects the engine coolant temperature and sends the appropriate signals to the integration control and panel. These signals are used for warm up control when engine is cold.

DTC No

Detection Item

Trouble Area

14

Open or short in engine coolant tempera lure sensor circuit.

• Engine coolant temp, sensor

• Harness or connector between engine coolant temp, sensor and ECM

• Harness or connector between ECM and integration control and panel

• Integration control and panel

Fig. 37: DTC Table

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

2000 Corolla Temp Sensor Diagram
Fig. 38: Wiring Diagram - Engine Coolant Temperature Sensor Circuit Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

2004 ACCESSORIES & EQUIPMENT Air Conditioning System - Diagnostics - Sequoia

1. Does DTC P0115 or P0117 or P0118 output?

YES: Go to engine troubleshooting (See HOW TO PROCEED WITH TROUBLESHOOTING ).

NO: Go to next step.

2. Check harness and connector between ECM and integration control and panel.

NG: Repair or replace harness or connector.

OK: Check and replace integration control and panel.

DTC 17: REAR EVAPORATOR TEMPERATURE SENSOR CIRCUIT

CIRCUIT DESCRIPTION

This sensor detects the rear evaporator temperature and sends the appropriate signals to the integration control and panel.

DTC No

Detection Item

Trouble Area

17

Open or short in rear evaporator temperature sensor circuit.

• Rear evaporator temp, sensor

• Harness or connector between rear evaporator temp, sensor and integration control and panct

• Integration control and panel

Fig. 39: DTC Table

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

Fig. 39: DTC Table

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

G0M2J18?

2004 ACCESSORIES & EQUIPMENT Air Conditioning System - Diagnostics - Sequoia

Fig. 40: Wiring Diagram - Rear Evaporator Temperature Sensor Circuit Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. Check voltage between terminals TEC and SG 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 TEC and SG of integration control and panel connector at each temperature.

Fig. 41: Measuring Voltage Between Terminals TEC & SG Of Integration Control & Panel Connector

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

Fig. 41: Measuring Voltage Between Terminals TEC & SG 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

HINT:

As the temperature increases, the voltage decreases. NG: Go to step 2.

OK: Proceed to next circuit inspection shown on problem symptoms table (See PROBLEM SYMPTOMS TABLE ). However, if DTC 17 is displayed, check and replace integration control and panel.

2. Check rear evaporator temperature sensor. PREPARATION:

Remove rear evaporator temperature sensor (See DISASSEMBLY ). CHECK:

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

2004 ACCESSORIES & EQUIPMENT Air Conditioning System - Diagnostics - Sequoia

Camry 2004 Outside Temperature Sensor
Fig. 42: Measuring Resistance Between Terminals Of Evaporator Temperature Sensor Connector Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Resistance:

at 0°C (32°F): 4.5 - 5.2 kohm at 15°C(59°F): 2.0-2.7 kohm

2004 ACCESSORIES & EQUIPMENT Air Conditioning System - Diagnostics - Sequoia

HINT:

As the temperature increases, the resistance decreases.

NG: Replace rear evaporator temperature sensor. OK: Go to next step.

3. Check harness and connector between rear evaporator 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 19: REAR ROOM TEMPERATURE SENSOR CIRCUIT

CIRCUIT DESCRIPTION

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

DTC No.

Detection Item

Trouble Area

19

Open or short in rear room temperature sensor circuit.

• Harness or connector between rear room temp, sensor and integration control and panel

• Integration control and panel

GUM22190

GUM22190

Fig. 43: DTC Table

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

2004 ACCESSORIES & EQUIPMENT Air Conditioning System - Diagnostics - Sequoia

Toyota Temperature Sensor Diagram
Fig. 44: Wiring Diagram - Rear Room Temperature Sensor Circuit Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. Check voltage between terminals TR and SG-5 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 TR and SG-5 of integration control and panel connector at each temperature.

2004 ACCESSORIES & EQUIPMENT Air Conditioning System - Diagnostics - Sequoia

Fig. 45: Measuring Voltage Between Terminals TR & SG-5 Of Integration Control & Panel Connector

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

OK: Voltage:

at 25°C (77°F): 1.8-2.2 V at 40°C (104°F): 1.2- 1.6 V

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Responses

  • pantaleone pugliesi
    How to troubleshoot temperature switch?
    8 years ago
  • Haris
    How to replace the engine coolant sensor on a sequoia?
    8 years ago
  • paulina
    Where is the idle air control valve pn 2004 toyota sequoina 4'7 litter?
    4 years ago
  • genet
    How to remove and replace evaporator core 2003 toyota sequoia?
    1 year ago

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