DESCRIPTION Toyota Camry XV40

DESCRIPTION

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

DTC DETECTION CONDITION AND TROUBLE AREA

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1. READ VALUE OF TECHSTREAM Connect the Techstream to the DLC3. Turn the ignition switch on (IG) and turn the Techstream main switch on. Select the item below in the DATA LIST, and read the display on the intelligent fester. DATA LIST/ AIR CONDITIONER: MEASUREMENT ITEM / DISPLAY (RANGE) AND DIAGNOSTIC NOTE Tester Display Measure Item / Range Normal Condition Diagnostic Note ROOM TEMP (Room temperature sensor) Room temperature sensor / min.: -6.5°C (20.3°F), max.: 57.25°C (135.05°F) Actual cabin temperature is displayed - OK: GO TO NEXT STEP The display is as specified in the normal condition column. Result RESULT DESCRIPTION Result Proceed to NG A OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) B OK (When troubleshooting according to the DTC) C B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-287558-S00628994632008061200000) C: REPLACE AIR CONDITIONING AMPLIFIER A: Go to next step
2. INSPECT AIR CONDITIONING AMPLIFIER Remove the A/C amplifier with the connectors still connected. Turn the ignition switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage TESTER CONNECTION AND SPECIFIED CONDITION Tester Connection Condition Specified Condition E38-29 (TR) - E38-34 (SG-1) Ignition switch on (IG) at 25°C (77°F) 1.35 to 1.75 V E38-29 (TR) - E38-34 (SG-1) Ignition switch on (IG) at 40°C (104°F) 0.9 to 1.2 V HINT: As the temperature increases, the voltage decreases. Result RESULT DESCRIPTION Result Proceed to NG A OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) B OK (When troubleshooting according to the DTC) C B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-287558-S00628994632008061200000) C: REPLACE AIR CONDITIONING AMPLIFIER A: Go to next step
3. INSPECT A/C ROOM TEMPERATURE SENSOR Remove the A/C room temperature sensor. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION Tester Connection Condition Specified Condition E27-1 - E27-2 10°C (50°F) 3.00 to 3.73 kohms E27-1 - E27-2 15°C (59°F) 2.45 to 2.88 kohms E27-1 - E27-2 20°C (68°F) 1.95 to 2.30 kohms E27-1 - E27-2 25°C (77°F) 1.60 to 1.80 kohms E27-1 - E27-2 30°C (86°F) 1.28 to 1.47 kohms E27-1 - E27-2 35°C (95°F) 1.00 to 1.22 kohms E27-1 - E27-2 40°C (104°F) 0.80 to 1.00 kohms E27-1 - E27-2 45°C (113°F) 0.65 to 0.85 kohms E27-1 - E27-2 50°C (122°F) 0.50 to 0.70 kohms E27-1 - E27-2 55°C (131°F) 0.44 to 0.60 kohms E27-1 - E27-2 60°C (140°F) 0.36 to 0.50 kohms NOTE: Hold the sensor only by its connector. Touching the sensor may change the resistance value. When measuring, the sensor temperature must be the same as the ambient temperature. HINT: As the temperature increases, the resistance decreases (see the graph ). NG: REPLACE A/C ROOM TEMPERATURE SENSOR OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (A/C ROOM TEMPERATURE SENSOR - AIR CONDITIONING AMPLIFIER) Disconnect the connector from the A/C amplifier. Disconnect the connector from the A/C room temperature sensor. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION Tester Connection Condition Specified Condition E38-29 (TR)-E27-1 Always Below 1 ohms E38-34 (SG-1) - E27-2 Always Below 1 ohms E38-29 (TR) - Body ground Always 10 kohms or higher E38-34 (SG-1) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE AIR CONDITIONING AMPLIFIER

The ambient temperature sensor is installed in front of the condenser to detect the ambient temperature which is used to control the air conditioner "AUTO" mode. This sensor is connected to the A/C amplifier and detects fluctuations in the ambient temperature. This data is used for controlling the cabin temperature. The sensor sends a signal to the A/C amplifier. The resistance of the ambient temperature sensor changes in accordance with the ambient 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 ambient temperature sensor and reads voltage changes as the resistance of the ambient temperature sensor changes.

DTC DETECTION CONDITION AND TROUBLE AREA

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1. READ VALUE OF TECHSTREAM Connect the Techstream to the DLC3. Turn the ignition switch on (IG) and turn the Techstream main switch on. Select the item below in the DATA LIST, and read the display on the Techstream. DATA LIST / AIR CONDITIONER: MEASUREMENT ITEM / DISPLAY (RANGE) AND DIAGNOSTIC NOTE Tester Display Measure Item / Range Normal Condition Diagnostic Note AMBI TEMP SENS (Ambient temperature sensor) Ambient temperature sensor/ Min: -23.3°C (-9.94°F), Max: 65.95°C (150.71°F) Actual ambient temperature is displayed Open in circuit: -23.3°C (-9.94°F) Short in circuit: 65.95°C (150.71°F) OK: GO TO NEXT STEP The display is as specified in the normal condition column. Result RESULT DESCRIPTION Result Proceed to NG A OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) B OK (When troubleshooting according to the DTC) C B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-287558-S00628994632008061200000) C: REPLACE AIR CONDITIONING AMPLIFIER A: Go to next step
2. INSPECT AIR CONDITIONING AMPLIFIER Remove the A/C amplifier connectors still connected. Turn the ignition switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage TESTER CONNECTION AND SPECIFIED CONDITION Tester Connection Condition Specified Condition E38-5 (TAM) - E38-13 (SG-2) Ignition switch on (IG) at 25°C (77°F) 1.35 to 1.75 V E38-5 (TAM) - E38-13 (SG-2) Ignition switch on (IG) at 40°C (104°F) 0.9 to 1.2 V HINT: As the temperature increases, the voltage decreases. Result RESULT DESCRIPTION Result Proceed to NG A OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) B OK (When troubleshooting according to the DTC) C B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-287558-S00628994632008061200000) C: REPLACE AIR CONDITIONING AMPLIFIER A: Go to next step
3. INSPECT AMBIENT TEMPERATURE SENSOR Remove the ambient temperature sensor. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION Tester Connection Condition Specified Condition A2-1 - A2-2 10°C (50°F) 3.00 to 3.73 kohms A2-1 - A2-2 15°C (59°F) 2.45 to 2.88 kohms A2-1 - A2-2 20°C (68°F) 1.95 to 2.30 kohms A2-1 - A2-2 25°C (77°F) 1.60 to 1.80 kohms A2-1 - A2-2 30°C (86°F) 1.28 to 1.47 kohms A2-1 - A2-2 35°C (95°F) 1.00 to 1.22 kohms A2-1 - A2-2 40°C (104°F) 0.80 to 1.00 kohms A2-1 - A2-2 45°C (113°F) 0.65 to 0.85 kohms A2-1 - A2-2 50°C (122°F) 0.50 to 0.70 kohms A2-1 - A2-2 55°C (131°F) 0.44 to 0.60 kohms A2-1 - A2-2 60°C (140°F) 0.36 to 0.50 kohms NOTE: Even slightly touching the sensor may change the resistance value. Be sure to hold the connector of the sensor. When measuring, the sensor temperature must be the same as the ambient temperature. HINT: As the temperature increases, the resistance decreases (see the graph ). NG: REPLACE AMBIENT TEMPERATURE SENSOR OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (AMBIENT TEMPERATURE SENSOR - A/C AMPLIFIER) Disconnect the ambient temperature sensor connector. Disconnect the A/C amplifier connector. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION Tester Connection Condition Specified Condition A2-2 - E38-5 (TAM) Always Below 1 ohms A2-1 - E38-13 (SG-2) Always Below 1 ohms E38-5 (TAM) - Body ground Always 10 kohms or higher E38-13 (SG-2) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE AIR CONDITIONING AMPLIFIER

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 evaporator and its signal is used to control the air conditioning. It sends a signal to the A/C amplifier. The resistance of the evaporator temperature sensor (A/C thermistor) changes in accordance with the temperature of the cooled air that has passed through the evaporator. As the temperature decreases, the resistance increases. As the temperature increases, the resistance decreases.

The A/C amplifier applies voltage (5 V) to the evaporator temperature sensor (A/C thermistor) and reads voltage changes as the resistance of the evaporator temperature sensor (A/C thermistor) changes. This sensor is used to prevent the evaporator from freezing.

DTC DETECTION CONDITION AND TROUBLE AREA

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1. READ VALUE OF TECHSTREAM Connect the Techstream to the DLC3. Turn the ignition switch on (IG) and turn the Techstream main switch on. Select the item below in the DATA LIST, and read the display on the Techstream. DATA LIST/AIR CONDITIONER: MEASUREMENT ITEM / DISPLAY (RANGE) AND DIAGNOSTIC NOTE Tester Display Measure Item / Range Normal Condition Diagnostic Note EVAP FIN TEMP (Evaporator fin thermistor) Evaporator fin thermistor/ Min.: -29.7°C (-21.46°F), Max,: 59.55°C (139.19°F) Actual evaporator temperature is displayed Open in circuit: -29.7°C (-21.46°F) Short in circuit: 59.55°C (139.19°F) OK: GO TO NEXT STEP The display is as specified in the normal condition column. Result RESULT DESCRIPTION Result Proceed to KG A OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) B OK (When troubleshooting according to the DTC) C B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-287558-S00628994632008061200000) C: REPLACE AIR CONDITIONING AMPLIFIER A: Go to next step
2. INSPECT AIR CONDITIONING HARNESS Remove the air conditioning harness (evaporator temperature sensor). Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION Tester Connection Condition Specified Condition e1-5-e1-6 -10°C (14°F) 7.30 to 9.10 kohms e1-5-e1-6 -5°C (23°F) 5.65 to 6.95 kohms e1-5-e1-6 0°C (32°F) 4.40 to 5.35 kohms e1-5-e1-6 5°C (41°F) 3.40 to 4.15 kohms e1-5-e1-6 10°C (50°F) 2.70 to 3.25 kohms e1-5-e1-6 15°C (59°F) 2.14 to 2.58 kohms e1-5-e1-6 20°C (68°F) 1.71 to 2.05 kohms e1-5-e1-6 25°C (77°F) 1.38 to 1.64 kohms e1-5-e1-6 30°C (86°F) 1.11 to 1.32 kohms NOTE: Even slightly touching the sensor may change the resistance value. Be sure to hold the connector of the sensor. When measuring, the sensor temperature must be the same as the ambient temperature. HINT: As the temperature increases, the resistance decreases (see the graph ). NG: REPLACE AIR CONDITIONING HARNESS OK: REPLACE AIR CONDITIONING AMPLIFIER

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The solar sensor, which is installed on the upper side of the instrument panel, detects sunlight and controls the air conditioning in AUTO mode. The output voltage from the solar sensor varies according to the amount of sunlight. When the sunlight increases, the output voltage increases. As the sunlight decreases, the output voltage decreases. The A/C amplifier detects voltage output from the solar sensor.

DTC DETECTION CONDITION AND TROUBLE AREA

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