Air Conditioning: Overview Lexus RX II facelift

DESCRIPTION

This sensor detects the temperature inside the cabin and sends the appropriate signals to the A/C amplifier.

DTC DETECTION CONDITION - TROUBLE AREA

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1. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to DLC3. Turn the ignition switch ON and push the intelligent tester main switch ON. Select the items below in the DATA LIST, and read the displays on the intelligent tester. DATA LIST Item Measurement Item / Display (Range) Normal Condition Diagnostic Note ROOM TEMP Room temperature sensor / min.: -6.5°C max.: 57.25°C Actual room temperature - Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOM TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : Go to step 5 A : Go To Next Step
2. INSPECT AIR CONDITIONING AMPLIFIER (TR - SG-5) Remove the A/C amplifier with connectors still connected. Turn the ignition switch to the ON position. Measure the voltage according to the value(s) in the table below. Standard voltage AIR CONDITIONING AMPLIFIER (TR - SG-5) (VOLTAGE) Tester connection Condition Specified condition A8-21 (TR) - A8-26 (SG-5) Ignition switch ON at 25°C (77°F) 2.0 +- 0.2 V A8-21 (TR) - A8-26 (SG-5) Ignition switch ON at 40°C (77°F) 1.4 +- 0.2 V HINT: As the temperature increases, the voltage decreases. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOM TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : Go to step 5 A : Go To Next Step
3. INSPECT COOLER THERMISTOR NO. 1 Remove the cooler thermistor No. 1. Measure the resistance according to the value(s) in the table below. Standard resistance COOLER THERMISTOR NO. 1 (RESISTANCE) Tester connection Condition Specified condition A9-1 - A9-2 10°C (50°F) 3.00 to 3.73 kohms A9-1 - A9-2 15°C (59°F) 2.45 to 2.88 kohms A9-1 - A9-2 20°C (68°F) 1.95 to 2.30 kohms A9-1 - A9-2 25°C (77°F) 1.60 to 1.80 kohms A9-1 - A9-2 30°C (86°F) 1.28 to 1.47 kohms A9-1 - A9-2 35°C (95°F) 1.00 to 1.22 kohms A9-1 - A9-2 40°C (104°F) 0.80 to 1.00 kohms A9-1 - A9-2 45°C (113°F) 0.65 to 0.85 kohms A9-1 - A9-2 50°C (122°F) 0.50 to 0.70 kohms A9-1 - A9-2 55°C (131°F) 0.44 to 0.60 kohms A9-1 - A9-2 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. HINT: As the temperature increases, the resistance decreases (see «COOLER THERMISTOR NO. 1 (RESISTANCE)»(ref-236010-S21531208472006062900000) ). NG: REPLACE COOLER THERMISTOR NO. 1 OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - COOLER THERMISTOR NO. 1) Measure the resistance according to the value(s) in the table below. Standard resistance AIR CONDITIONING AMPLIFIER - COOLER THERMISTOR NO. 1 (RESISTANCE) Tester connection Condition Specified condition A8-26 (SG-5) - A9-2 Always Below 1 ohms A8-21 (TR) - A9-1 Always Below 1 ohms A8-26 (SG-5) - Body ground Always 10 kohms or higher A8-21 (TR) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : Go to next step
5. READ DTC OUTPUT Clear the DTCs. Read DTC at least 8.5 minutes after turning the ignition switch to the ON position. Standard: Normal codes are output. NG : REPLACE AIR CONDITIONING AMPLIFIER OK : USE SIMULATION METHOD TO CHECK

The A/C ambient temperature sensor is installed in the front part of the condenser to detect the ambient temperature and control the heater and air conditioner "AUTO" function. The sensor connected to the ECM detects fluctuation in the ambient temperature that is used for controlling the room temperature. The sensor sends a signal to the A/C amplifier assembly via the ECM. The resistance of the A/C 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 ECM applies voltage (5 V) to the A/C ambient temperature sensor and reads voltage changes as the resistance of the A/C ambient temperature sensor changes. The ECM sends the read signal to the A/C amplifier via body multiplex communications.

DTC DETECTION CONDITION - TROUBLE AREA

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1. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the ignition switch ON and push the intelligent tester main switch on. Select the item below in the DATA LIST, and read the display on the intelligent tester. DATA LIST / AIR CONDITIONER AIR CONDITIONER DATA LIST Item Measurement Item / Display (Range) Normal Condition Diagnostic Note AMBIENT TEMP SENS Ambient temperature sensor / min.: -23.3°C (-9.94°F) max.: 65.95°C (150.71°F) Actual ambient temperature is displayed Open in the circuit: -23.3°C (-9.94°F) Short in the circuit: 65.95°C (150.71°F) OK: The display is as specified in the normal condition. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C: REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A: Go to next step
2. INSPECT ECM Remove the ECM with the connectors still connected. Measure the voltage according to the value(s) in the table below. Standard voltage TESTER CONNECTION - SPECIFIED CONDITION (VOLTAGE) Tester connection (Symbols) Condition Specified condition E6-32 (TAM) - E8-28 (E2) Ignition switch ON at 25°C (77°F) 1.7 to 2.1 V E6-32 (TAM) - E8-28 (E2) Ignition switch ON at 40°C (104°F) 1.0 to 1.4 V HINT: As the temperature increases, the voltage decreases. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C: REPLACE ECM A: Go to next step
3. INSPECT A/C AMBIENT TEMPERATURE SENSOR Remove the A/C ambient temperature sensor. Disconnect the connector from the A/C ambient temperature sensor. Measure the resistance according to the value(s) in the table below. Standard resistance A/C AMBIENT TEMPERATURE SENSOR (RESISTANCE) Tester connection Condition Specified condition A1-1 - A1-2 10°C (50°F) 3.00 to 3.73 kohms A1-1 - A1-2 15°C (59°F) 2.45 to 2.88 kohms A1-1 - A1-2 20°C (68°F) 1.95 to 2.30 kohms A1-1 - A1-2 25°C (77°F) 1.60 to 1.80 kohms A1-1 - A1-2 30°C (86°F) 1.28 to 1.47 kohms A1-1 - A1-2 35°C (95°F) 1.00 to 1.22 kohms A1-1 - A1-2 40°C (104°F) 0.80 to 1.00 kohms A1-1 - A1-2 45°C (113°F) 0.65 to 0.85 kohms A1-1 - A1-2 50°C (122°F) 0.50 to 0.70 kohms A1-1 - A1-2 55°C (131°F) 0.44 to 0.60 kohms A1-1 - A1-2 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 (Scheme 9) NG: REPLACE A/C AMBIENT TEMPERATURE SENSOR OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (A/C AMBIENT TEMPERATURE SENSOR - ECM) Disconnect the connector from the ECM. Measure the resistance according to the value(s) in the table below. Standard resistance A/C AMBIENT TEMPERATURE SENSOR - ECM (RESISTANCE) Tester connection Condition Specified condition E6-32 (TAM) - A1-2 Always Below 1 ohms E8-28 (E2) - A1-1 Always Below 1 ohms E6-32 (TAM) - Body ground Always 10 kohms or higher E8-28 (E2) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE ECM

The A/C evaporator temperature sensor (A/C thermistor) is installed on the evaporator in the air conditioner unit to detect the cooled air temperature that has passed through the evaporator and control the air conditioning. It sends appropriate signals to the A/C amplifier assembly. The resistance of the A/C evaporator temperature sensor (A/C thermistor) changes in accordance with the cooled air temperature that has passed through the evaporator. As the temperature decreases, the resistance increases. As the temperature increases, the resistance decreases.

The A/C amplifier assembly applies voltage (5 V) to the A/C evaporator temperature sensor (A/C thermistor) and reads voltage changes as the resistance of the A/C evaporator temperature sensor (A/C thermistor) changes. This sensor is used for frost prevention.

DTC DETECTION CONDITION - TROUBLE AREA

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1. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the ignition switch ON and push the intelligent tester main switch on. Select the item below in the DATA LIST, and read the display on the intelligent tester. DATA LIST / AIR CONDITIONER AIR CONDITIONER DATA LIST Item Measurement Item / Display (Range) Normal Condition Diagnostic Note EVAP TEMP Evaporator temperature sensor / min.: -29.7°C (-21.46°F) max.: 59.55°C (139.19°F) Actual evaporator temperature is displayed Open in the circuit: -29.7°C (-21.46°F) Short in the circuit: 59.55°C (139.19°F) OK: The display is as specified in the normal condition. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A : Go to next step
2. INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY Remove the A/C amplifier assembly with the connectors still connected. Measure the voltage according to the table value(s) in the table below. Standard voltage AIR CONDITIONING AMPLIFIER ASSEMBLY (VOLTAGE) Tester connection (Symbols) Condition Specified condition A7-12 (TE) - A7-11 (SG) Ignition switch ON at 0°C (32°F) 2.2 to 2.6 V A7-12 (TE) - A7-11 (SG) Ignition switch ON at 15°C (59°F) 1.3 to 1.7 V HINT: As the temperature increases, the voltage decreases. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A : Go to next step
3. INSPECT A/C EVAPORATOR TEMPERATURE SENSOR Remove the A/C evaporator temperature sensor (A/C thermistor). Disconnect the connector from the A/C evaporator temperature sensor (A/C thermistor). Measure the resistance according to the value(s) in the table below. Standard resistance A/C EVAPORATOR TEMPERATURE SENSOR (RESISTANCE) Tester connection Condition Specified condition A11-1 - A11-2 -10°C (14°F) 7.30 to 9.10 kohms A11-1 - A112 -5°C (23°F) 5.65 to 6.95 kohms A11-1 - A11-2 0°C (32°F) 4.40 to 5.35 kohms A11-1 - A11-2 5°C (41°F) 3.40 to 4.15 kohms A11-1 - A11-2 10°C (50°F) 2.70 to 3.25 kohms A11-1 - A11-2 15°C (59°F) 2.14 to 2.58 kohms A11-1 - A11-2 20°C (68°F) 1.71 to 2.05 kohms A11-1 - A11-2 25°C (77°F) 1.38 to 1.64 kohms A11-1 - A11-2 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 A/C EVAPORATOR TEMPERATURE SENSOR OK : Go to next step
4. CHECK HARNESS AND CONNECTOR (A/C EVAPORATOR TEMPERATURE SENSOR - A/C AMPLIFIER ASSEMBLY) Disconnect the connector from the A/C amplifier assembly. Measure the resistance according to the value(s) in the table below. Standard resistance A/C EVAPORATOR TEMPERATURE SENSOR - A/C AMPLIFIER ASSEMBLY (RESISTANCE) Tester connection (Symbols) Condition Specified condition A7-12 (TE) - A11-2 Always Below 1 ohms A7-11 (SG) - A11-1 Always Below 1 ohms A7-12 (TE) - Body ground Always 10 kohms or higher A7-11 (SG) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

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The automatic light control sensor is installed in the upper part of the instrument panel to detect the amount of solar sensor radiation with photo diode to control the heater and air conditioner "AUTO" function. It sends appropriate signals to the A/C amplifier assembly. The output voltage of the automatic light control sensor changes in accordance with the amount of solar radiation. As the amount increases, the voltage increases. As the amount decreases, the voltage decreases. The A/C amplifier assembly reads voltage output from the automatic light control sensor.

DTC DETECTION CONDITION - TROUBLE AREA

HINT

If DTC B1244 is output at the same time, troubleshoot DTC B1244 first.

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1. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the ignition switch ON and push the intelligent tester main switch on. Select the item below in the DATA LIST, and read the display on the intelligent tester. DATA LIST / AIR CONDITIONER AIR CONDITIONER DATA LIST Item Measurement Item / Display (Symbols) Normal Condition Diagnostic Note SOLAR SENS-P Solar sensor (Passenger side) / min.: 0 max.: 255 Increases as brightness increases Open in the circuit: 0 Short in the circuit: 255 OK: The display is as specified in the normal condition. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A : Go to next step
2. INSPECT MULTIPLEX NETWORK BODY ECU Remove the multiplex network body ECU with the connectors still connected. Turn the ignition switch to the ON position. Measure the voltage according to the value(s) in the table below. Standard voltage MULTIPLEX NETWORK BODY ECU (VOLTAGE) Tester connection (Symbols) Condition Specified condition B4-6 (CLTB) - B4-4 (CLTE) Ignition switch ON 10 to 14 V OK : Go to step 4 NG : Go to next step
3. CHECK HARNESS AND CONNECTOR (AUTOMATIC LIGHT CONTROL SENSOR-MULTIPLEX NETWORK BODY ECU) Disconnect the connector from the automatic light control sensor and multiplex network body ECU. Measure the resistance according to the value(s) in the table below. Standard resistance AUTOMATIC LIGHT CONTROL SENSOR-MULTIPLEX NETWORK BODY ECU (RESISTANCE) Tester connection (Symbols) Condition Specified condition A10-6 (CLTB) - B4-6 (CLTB) Always Below 1 ohms A10-3 (CLTE) - B4-4 (CLTE) Always Below 1 ohms A10-6 (CLTB) - Body ground Always 10 kohms or higher A10-3 (CLTE) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MULTIPLEX NETWORK BODY ECU
4. CHECK HARNESS AND CONNECTOR (AUTOMATIC LIGHT CONTROL SENSOR - A/C AMPLIFIER ASSEMBLY) Disconnect the connector from the A/C amplifier assembly. Measure the resistance according to the value(s) in the table below. Standard resistance AUTOMATIC LIGHT CONTROL SENSOR - A/C AMPLIFIER ASSEMBLY (RESISTANCE) Tester connection (Symbols) Condition Specified condition A8-11 (TSP) - A10-2 (TSR) Always Below 1 ohms A8-11 (TSP) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : Go to next step
5. INSPECT AUTOMATIC LIGHT CONTROL SENSOR Remove the automatic light control sensor. Apply battery voltage between terminals A10-6 (CLTB) and A10-3 (CLTE) of the automatic light control sensor. Measure the voltage according to the value(s) in the table below. Standard voltage AUTOMATIC LIGHT CONTROL SENSOR (VOLTAGE) Tester connection (Symbols) Condition Specified condition A10-2 (TSR) - A10-3 (CLTE) Sensor is subject to electric light 0.8 to 4.3 V A10-2 (TSR) - A10-3 (CLTE) Sensor is covered with a cloth Below 0.8 V NOTE: The connection procedure for using a digital tester such as a TOYOTA electrical tester is shown above. When using an analog tester, connect the positive (+) lead to terminal 2 and negative (-) lead to terminal 1 of the automatic light control sensor. HINT: As the inspection light moved away from the sensor, the voltage increases. Use an incandescent light for inspection. Bring it about 30 cm (11.8 in.) from the automatic light control sensor. NG : REPLACE AUTOMATIC LIGHT CONTROL SENSOR OK : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

This sensor sends 1 pulses per engine revolution to the ECM.

If the number ratio of the compressor speed divided by the engine speed is smaller than a predetermined value, the ECM turns the compressor off, and the indicator flashes at approx. 1 second intervals.

DTC DETECTION CONDITION - TROUBLE AREA

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1. CHECK COOLER COMPRESSOR ASSEMBLY Check and adjust compressor drive belt tension (See «INSTALLATION»(ref-236010-S23074672202006062900000) ). Check if the cooler compressor does not lock during operation with engine started and below switch and A/C switch ON. Standard: Cooler compressor assembly does not lock during operation. NG: REPLACE COOLER COMPRESSOR ASSEMBLY OK: Go to next step
2. INSPECT ECM (LCK1 - BODY GROUND) Remove the ECM with connectors being connected. Start the engine and push AUTO switch. Measure the waveform according to the value(s) in the table below. Waveform WAVEFORM REFERENCE Tester connection Condition Specified condition E7-23 (LCKI) - Body ground Ignition SW ON AUTO SW ON Pulse generation Result OUTPUT RESULT TABLE Condition Proceed to NG A OK (Checking from the PROBLEM SYMPTOM TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : Go to step 5 A : Go to next step
3. INSPECT COOLER COMPRESSOR ASSEMBLY Disconnect the cooler compressor assembly connector. Measure the resistance according to the value(s) in the table below. Standard resistance COOLER COMPRESSOR ASSEMBLY (RESISTANCE) Tester connection Condition Specified condition 1 - 2 at normal temperature 185 +- 20 ohms NG : REPLACE COOLER COMPRESSOR ASSEMBLY OK : Go to next step
4. CHECK HARNESS AND CONNECTOR Disconnect the cooler compressor assembly connector. Measure the resistance according to the value(s) in the table below. Standard resistance HARNESS AND CONNECTOR (RESISTANCE) Tester connection Condition Specified condition A2-1 - E7-23 (LCKI) Always Below 1 ohms A2-2 - Body ground Always Below 1 ohms A2-1 - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : Go to next step
5. READ DTC OUTPUT Clear the DTCs. Read DTC at turning the ignition switch to the ON position. Standard: Normal codes are output. NG : REPLACE AIR CONDITIONING AMPLIFIER OK : USE SIMULATION METHOD TO CHECK

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The A/C pressure switch to detect the refrigerant pressure is located in the sight glass side of the pipe on the high-pressure side. This DTC is output when the refrigerant pressure is either significantly low (below 196 kPa (2.0 kgf/cm 2 , 28 psi) or significantly high (over 3,140 kPa (32.0 kgf/cm 2 , 455 psi). Then the A/C pressure switch has built-in switches to detect high and low pressure and is turned off when either of them is determined to be detective. The A/C amplifier assembly continuously monitors the pressure switch signal after the ignition switch is turned on. It stops compressor control and outputs the DTC when it detects the signal indicating that the switch is turned off.

DTC DETECTION CONDITION - TROUBLE AREA

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1. INSPECT REFRIGERANT PRESSURE Set the manifold gauge (See «ON-VEHICLE INSPECTION»(ref-236010-S37318819712006062900000) ). Read the manifold gauge pressure when the following conditions are established. Temperature at the air inlet with the switch set at RECIRCULATION is 30 to 35°C (86 to 95°F) Ignition switch is ON. Blower speed control switch is at "HI" position Temperature control dial is at "COOL" position Air conditioning switch is ON Doors are fully open Standard: Pressure on high pressure side 1.37 to 1.57 MPa (13.9 to 16.0 kgf/cm 2, 198 to 228 psi) HINT: If the refrigerant pressure is below 196 kPa (2.0 kgf/cm 2, 28 psi), the refrigerant amount in the air conditioning cycle may have decreased significantly for reasons such as a gas leakage. NG: CHECK AND REPLACE AIR CONDITIONING CYCLE OK: Go to next step
2. CHECK AIR CONDITIONING OPERATION Disconnect the connector from the A/C pressure switch. Connect the terminals 1 and 4 of the connector of the pressure switch on the vehicle wire harness side using a service wire. Turn the ignition switch ON. Turn the air conditioning switch ON and check that the compressor is operated. Check that the compressor is not operated when terminals 1 and 4 (that were connected in the prior step) are disconnected. OK: Terminals 1 and 4 connected: the compressor is operated Terminals 1 and 4 disconnected: the compressor is not operated Check that the electrical fan is operated when disconnecting terminals 2 and 3 (that were connected in the prior step). OK: Terminals 2 and 3 connected: the electrical fan is operated Terminals 2 and 3 disconnected: the electrical fan is not operated NG : Go to step 3 OK : REPLACE A/C PRESSURE SWITCH
3. CHECK HARNESS AND CONNECTOR (A/C PRESSURE SWITCH - ECM) Disconnect the connectors from the A/C pressure switch and ECM. Measure the resistance according to the value(s) in the table below. Standard resistance A/C PRESSURE SWITCH - ECM (RESISTANCE) Tester connection (Symbols) Condition Specified condition E7-8 (PR2) - P5-3 Always Below 1 ohms E6-1 (HP) - P5-1 Always Below 1 ohms E7-8 (PR2) - Body round Always 10 kohms or higher E6-1 (HP) - Body ground Always 10 kohms or higher P5-2 - Body ground Always Below 1 ohms P5-4 - Body ground Always Below 1 ohms Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE ECM A : REPAIR OR REPLACE HARNESS OR CONNECTOR

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The automatic light control sensor is installed in the upper part of the instrument panel to detect the amount of solar sensor radiation with photo diode to control the heater and air conditioner "AUTO" function. It sends appropriate signals to the A/C amplifier assembly. The output voltage of the automatic light control sensor changes in accordance with the amount of solar radiation. As the amount increases, the voltage increases. As the amount decreases, the voltage decreases. The A/C amplifier assembly reads voltage output from the automatic light control sensor.

DTC DETECTION CONDITION - TROUBLE AREA

HINT

If DTC B1244 is output at the same time, troubleshoot DTC B1244 first.

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1. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the ignition switch ON and push the intelligent tester main switch on. Select the item below in the DATA LIST, and read the display on the intelligent tester. DATA LIST / AIR CONDITIONER AIR CONDITIONER DATA LIST Item Measurement Item / Display (Range) Normal Condition Diagnostic Note SOLAR SENS-D Solar sensor (Driver side) / min.: 0 max.: 255 Increases as brightness increases Open in the circuit: 0 Short in the circuit: 255 OK: The display is as specified in the normal condition. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A : Go to next step
2. INSPECT MULTIPLEX NETWORK BODY ECU Remove the multiplex network body ECU with the connectors still connected. Turn the ignition switch to the ON position. Measure the voltage according to the value(s) in the table below. Standard voltage MULTIPLEX NETWORK BODY ECU (VOLTAGE) Tester connection (Symbols) Condition Specified condition B4-6 (CLTB) - B4-4 (CLTE) Ignition switch ON 10 to 14 V OK : Go to step 4 NG : Go to next step
3. CHECK HARNESS AND CONNECTOR (AUTOMATIC LIGHT CONTROL SENSOR - MULTIPLEX NETWORK BODY ECU) Disconnect the connector from the automatic light control sensor and multiplex network body ECU. Measure the resistance according to the value(s) in the table below. Standard resistance AUTOMATIC LIGHT CONTROL SENSOR - MULTIPLEX NETWORK BODY ECU (RESISTANCE) Tester connection (Symbols) Condition Specified condition A10-6 (CLTB) - B4-6 (CLTB) Always Below 1 ohms A10-3 (CLTE) - B4-4 (CLTE) Always Below 1 ohms A10-6 (CLTB) - Body ground Always 10 kohms or higher A10-3 (CLTE) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MULTIPLEX NETWORK BODY ECU
4. CHECK HARNESS AND CONNECTOR (AUTOMATIC LIGHT CONTROL SENSOR - A/C AMPLIFIER ASSEMBLY) Disconnect the connector from the A/C amplifier assembly. Measure the resistance according to the value(s) in the table below. Standard resistance AUTOMATIC LIGHT CONTROL SENSOR - A/C AMPLIFIER ASSEMBLY (RESISTANCE) Tester connection (Symbols) Condition Specified condition A8-10 (TSD) - A10-1 (TSL) Always Below 1 ohms A8-10 (TSD) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : Go to next step
5. INSPECT AUTOMATIC LIGHT CONTROL SENSOR Remove the automatic light control sensor. Apply battery voltage between terminals A10-6 (CLTB) and A10-3 (CLTE) of the automatic light control sensor. Measure the voltage according to the value(s) in the table below. Standard voltage AUTOMATIC LIGHT CONTROL SENSOR (VOLTAGE) Tester connection (Symbols) Condition Specified condition A10-1 (TSL) - A10-3 (CLTE) Sensor is subject to electric light 0.8 to 4.3 V A10-1 (TSL) - A10-3 (CLTE) Sensor is covered with a cloth Below 0.8 V NOTE: The connection procedure for using a digital tester such as a TOYOTA electrical tester is shown above. When using an analog tester, connect the positive (+) lead to terminal 2 and negative (-) lead to terminal 1 of the automatic light control sensor. HINT: As the inspection light is moved away from the sensor, the voltage increases. Use an incandescent lamp for inspection. Bring it about 30 cm (11.8 in.) from the automatic light control sensor. NG : REPLACE AUTOMATIC LIGHT CONTROL SENSOR OK : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

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This sensor detects the position of the air mix control servo motor (air mix damper) and sends the appropriate signals to the A/C amplifier assembly. The position sensor is built in the air mix control servo motor arm moves.

It outputs voltage (5 V) that is input to terminal 1 (VZ) and terminal 3 (PT) via the variable resistor, and then to the A/C amplifier assembly.

The A/C amplifier assembly reads the arm position with the input voltage from the position sensor.

DTC DETECTION CONDITION - TROUBLE AREA

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1. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the ignition switch ON and push the intelligent tester main switch on. Select the item below in the DATA LIST, and read the display on the intelligent tester. DATA LIST / AIR CONDITIONER AIR CONDITIONER DATA LIST Item Measurement Item / Display (Range) Normal Condition Diagnostic Note A/M DAMP POS-P Air mix damper position (Passenger side) / min.: -14% max.: 113.5% Damper is at "MAX. COOL": -5% Damper is at "MAX. HOT": 105% - A/M DAMP TARG-P Air mix damper target position (Passenger side) / min.: -14% max.: 113.5% OK: The display is as specified in the normal condition. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A : Go to next step
2. INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY Remove the A/C amplifier assembly with the connectors still connected. Change the set temperature to activate the air mix servomotor. Measure the voltage according to the value(s) in the table below. Standard voltage AIR CONDITIONING AMPLIFIER ASSEMBLY (VOLTAGE) Tester connection (Symbols) Condition Specified condition A7-10 (TPP) - A7-19 (SG-2) Ignition switch ON MAX. HOT position 0.82 to 0.88 V A7-10 (TPP) - A7-19 (SG-2) Ignition switch ON MAX. COOL position 4.12 to 4.18 V A7-22 (S5-2) - A7-19 (SG-2) Ignition switch ON 4.5 to 5.5 V A7-22 (S5-2) - A7-19 (SG-2) Ignition switch OFF Below 1 V HINT: As the set temperature increases, the voltage decreases gradually without interruption. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A : Go To Next Step
3. INSPECT AIR MIX CONTROL SERVO MOTOR Remove the air mix control servo motor. Disconnect the connector from the air mix control servo motor. Measure the resistance according to the value(s) in the table below. Standard resistance AIR MIX CONTROL SERVO MOTOR (RESISTANCE) (1 OF 2) Tester connection (Symbols) Condition Specified condition A18-1 (VZ) - A18-2 (GND) Always 4.2 to 7.8 kohms Measure the resistance according to the value(s) in the table below. Standard resistance AIR MIX CONTROL SERVO MOTOR (RESISTANCE) (2 OF 2) Tester connection Condition Specified condition A18-3 (PT) - A18-2 (GND) MAX. COOL position 3.5 to 6.5 kohms A18-3 (PT) - A18-2 (GND) MAX. HOT position 0.7 to 1.3 kohms As the air mix control servo motor moves from cool side to hot side, the resistance decreases gradually without interruption. HINT: For details regarding operation of the servo motor (See «DTC B1441/41 Air Mix Damper Control Servomotor Circuit (Passenger Side)»(ref-236010-S02478651882006062900000) ). NG: REPLACE AIR MIX CONTROL SERVO MOTOR OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (AIR MIX CONTROL SERVO MOTOR - A/C AMPLIFIER ASSEMBLY) Disconnect the connector from the A/C amplifier assembly. Measure the resistance according to the value(s) in the table below. Standard resistance AIR MIX CONTROL SERVO MOTOR - A/C AMPLIFIER ASSEMBLY (RESISTANCE) Tester connection (Symbols) Condition Specified condition A7-10 (TPP) - A18-3 (PT) Always Below 1 ohms A7-19 (SG-2) - A18-2 (GND) Always Below 1 ohms A7-22 (S5-2) - A18-1 (VZ) Always Below 1 ohms A7-10 (TPP) - Body ground Always 10 kohms or higher A7-19 (SG-2) - Body ground Always 10 kohms or higher A7-22 (S5-2) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

Scheme 44

This sensor detects the position of the air inlet control servo motor and sends the appropriate signals to the A/C amplifier assembly. The position sensor is built in the air inlet control servo motor. The position sensor's resistance changes as the air inlet control servo motor arm moves. It outputs voltage (5 V) that is input to terminal 1 (VZ) and terminal 3 (PT) via the variable resister, and then to the A/C amplifier assembly.

The A/C amplifier reads the arm position with the input voltage from the position sensor.

DTC DETECTION CONDITION - TROUBLE AREA

Scheme 45

Scheme 46

Scheme 47

Scheme 48

Scheme 49

1. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the ignition switch ON and push the intelligent tester main switch on. Select the item below in the DATA LIST, and read the display on the intelligent tester. DATA LIST / AIR CONDITIONER AIR CONDITIONER DATA LIST Item Measurement Item / Display (Range) Normal Condition Diagnostic Note A/I DAMP POS Air inlet damper position / min.: -14% max.: 113.5% Damper is at "RECIRCULATION": -9% Damper is at "FRESH": 109% Damper is at "HALF-RECIRCULATION": 35 to 75% Open in the circuit: 50.0% A/I DAMP TARG Air inlet damper target position / min.: -14% max.: 113.5% OK: The display is as specified in the normal condition. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A : Go to next step
2. INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY Remove the A/C amplifier assembly with the connectors still connected. Change the set REC/FRS to activate the air inlet control servo motor. Measure the voltage according to the value(s) in the table below. Standard voltage AIR CONDITIONING AMPLIFIER ASSEMBLY (VOLTAGE) Tester connection (Symbols) Condition Specified condition A7-7 (TPI) - A7-17 (SG-4) Ignition switch ON RECIRCULATION position 3.8 to 4.8 V A7-7 (TPI) - A7-17 (SG-4) Ignition switch ON FRESH position 0.2 to 1.2 V A7-13 (S5-4) - A7-17 (SG-4) Ignition switch ON 4.5 to 5.5 V A7-13 (S5-4) - A7-17 (SG-4) Ignition switch OFF Below 1 V HINT: As the air inlet control servo motor is moved from REC side to FRS side, the voltage decreases gradually without interruption. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A : Go to next step
3. INSPECT AIR INLET CONTROL SERVO MOTOR Remove the air inlet control servo motor. Disconnect the connector from the air inlet control servo motor. Measure the resistance according to the value(s) in the table below. Standard resistance AIR INLET CONTROL SERVO MOTOR (RESISTANCE) Tester connection (Symbol) Condition Specified condition A16-1 (VZ) - A16-2 (GND) Always 4.2 to 7.8 kohms Measure the resistance according to the value(s) in the table below. Standard resistance AIR INLET CONTROL SERVO MOTOR (RESISTANCE) Tester connection (Symbols) Condition Specified condition A16-3 (PT) - A16-2 (GND) RECIRCULATION position 4.1 to 6.1 kohms A16-3 (PT) - A16-2 (GND) FRESH position 0.6 to 1.2 kohms As the air inlet control servo motor moves from fresh to recirculation, the resistance decreases gradually without interruption. HINT: For details regarding operation of the servo motor (See «DTC B1442/42 Air Inlet Damper Control Servo Motor Circuit»(ref-236010-S22216461082006062900000) ). NG: REPLACE AIR INLET CONTROL SERVO MOTOR OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (AIR INLET CONTROL SERVO MOTOR - A/C AMPLIFIER ASSEMBLY) Disconnect the connector from the A/C amplifier assembly. Measure the resistance according to the value(s) in the table below. Standard resistance AIR INLET CONTROL SERVO MOTOR - A/C AMPLIFIER ASSEMBLY (RESISTANCE) Tester connection (Symbols) Condition Specified condition A7-7 (TPI) - A16-3 (PT) Always Below 1 ohms A7-17 (SG-4) - A16-1 (VZ) Always Below 1 ohms A7-13 (S5-4) - A16-2 (GND) Always Below 1 ohms A7-7 (TPI) - Body ground Always 10 kohms or higher A7-17 (SG-4) - Body ground Always 10 kohms or higher A7-13 (S5-4) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

Scheme 50

This sensor detects the position of the air outlet control servo motor and sends the appropriate signals to the A/C amplifier assembly. The position sensor is built in the air outlet control servo motor. The potentiometer's resistance changes as the air outlet control servo motor arm moves.

It outputs voltage (5 V) that is input to terminal 2 (VZ) and terminal 3 (PT) via the variable resistor, and then to the A/C amplifier assembly. The A/C amplifier assembly reads the arm position with the input voltage from the position sensor.

DTC DETECTION CONDITION - TROUBLE AREA

Scheme 51

Scheme 52

Scheme 53

Scheme 54

Scheme 55

1. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the ignition switch ON and push the intelligent tester main switch on. Select the items below in the DATA LIST, and read the displays on the intelligent tester. DATA LIST / AIR CONDITIONER AIR CONDITIONER DATA LIST Item Measurement Item / Display (Range) Normal Condition Diagnostic Note A/O DAMP POS Air outlet damper position / min.: -14% max.: 113.5% Damper is at "FACE": 0% Damper is at "FACE/FOOT": 33.5% Damper is at "FOOT" (Manual): 53.5% Damper is at "FOOT" (Auto): 53.5% Damper is at "FACE/DEF": 73.5% Damper is at "DEF": 100% Open in the circuit: 50.0% A/O DAMP TARG Air outlet damper target position / min.: -14% max.: 113.5% OK: The display is as specified in the normal condition. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOM TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A : Go to next step
2. INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY Remove the A/C amplifier assembly with the connectors still connected. Measure the voltage according to the value(s) in the table below. Standard voltage AIR CONDITIONING AMPLIFIER ASSEMBLY (VOLTAGE) Tester connection (Symbols) Condition Specified condition A7-8 (TPO) - A7-18 (SG-3) Ignition switch ON FACE position 3.97 to 4.03 V A7-8 (TPO) - A7-18 (SG-3) Ignition switch ON DEF position 0.97 to 1.03 V A7-21 (S5-3) - A7-18 (SG-3) Ignition switch ON 4.5 to 5.5 V A7-21 (S5-3) - A7-18 (SG-3) Ignition switch OFF Below 1 V HINT: As the air outlet control servo motor is moved from the FACE side to DEF side, the voltage decreases gradually without interruption. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A : Go to next step
3. INSPECT AIR OUTLET CONTROL SERVO MOTOR Remove the air outlet control servo motor. Disconnect the connector from the air outlet control servo motor. Measure the resistance according to the value(s) in the table below. Standard resistance AIR OUTLET CONTROL SERVO MOTOR (RESISTANCE) (1 OF 2) Tester connection (Symbols) Condition Specified condition A19-2 (VZ) - A19-1 (GND) Always 4.2 to 7.8 kohms Measure the resistance according to the value(s) in the table below. Standard resistance AIR OUTLET CONTROL SERVO MOTOR (RESISTANCE) (2 OF 2) Tester connection (Symbols) Condition Specified condition A19-3 (PT) - A19-1 (GND) DEF position 0.8 to 1.6 kohms A19-3 (PT) - A19-1 (GND) FACE position 3.4 to 6.2 kohms As the air outlet control servo motor moved from the DEF side to FACE side, the resistance decreases gradually without interruption. HINT: For details regarding operation of the servo motor (See «DTC B1443/43 Air Outlet Damper Control Servo Motor Circuit»(ref-236010-S16019530712006062900000) ). NG: REPLACE AIR INLET CONTROL SERVO MOTOR OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (AIR OUTLET CONTROL SERVO MOTOR - A/C AMPLIFIER ASSEMBLY) Disconnect the connector from the A/C amplifier assembly. Measure the resistance according to the value(s) in the table below. Standard resistance AIR OUTLET CONTROL SERVO MOTOR - A/C AMPLIFIER ASSEMBLY (RESISTANCE) Tester connection (Symbols) Condition Specified condition A7-8 (TPO) - A19-3 (PT) Always Below 1 ohms A7-18 (SG-3) - A19-1 (GND) Always Below 1 ohms A7-21 (S5-3) - A19-2 (VZ) Always Below 1 ohms A7-8 (TPO) - Body ground Always 10 kohms or higher A7-18 (SG-3) - Body ground Always 10 kohms or higher A7-21 (S5-3) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

Scheme 56

This sensor detection the position of the air mix control servo motor (air outlet damper) and sends the appropriate signals to the A/C amplifier assembly. The position sensor is built in the air mix control servo motor. The position sensor resistance changes as the air mix control arm moves.

It outputs voltage (5 V) that is input to terminal 1 (VZ) and terminal 3 (PT) via the variable resistor, and then to the A/C amplifier assembly. The A/C amplifier assembly reads the arm position with the input voltage from the position sensor.

DTC DETECTION CONDITION - TROUBLE AREA

Scheme 57

Scheme 58

Scheme 59

Scheme 60

Scheme 61

1. READ VALUE OF INTELLIGENT TEST Connect the intelligent tester to the DLC3. Turn the ignition switch ON and push the intelligent tester main switch on. Select the item below in the DATA LIST, and read the display on the intelligent tester. DATA LIST / AIR CONDITIONER AIR CONDITIONER DATA LIST Item Measurement Item / Display (Range) Normal Condition Diagnostic Note A/M DAMP POS-D Air mix damper position (Driver side) / min.: -14% max.: 113.5% Damper is at "MAX. COOL": -5% Damper is at "MAX. HOT": 105% - A/M DAMP TARG-D Air mix damper target position (Driver side) / min.: -14% max.: 113.5% OK: The display is as specified in the normal condition. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOM TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A : Go to next step
2. INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY Remove the A/C amplifier with the connectors still connected. Change the set temperature to activate the air mix control servo motor. Measure the voltage according to the value(s) in the table below. Standard voltage AIR CONDITIONING AMPLIFIER ASSEMBLY (VOLTAGE) Tester connection (Symbols) Condition Specified condition A7-9 (TPD) - A7-20 (SG-1) Ignition switch ON MAX. HOT position 0.82 to 0.88 V A7-9 (TPD) - A7-20 (SG-1) Ignition switch ON MAX. COOL position 4.12 to 4.18 V A7-23 (S5-1) - A7-20 (SG-1) Ignition switch ON 4.5 to 5.5 V A7-23 (S5-1) - A7-20 (SG-1) Ignition switch OFF Below 1 V HINT: As the set temperature increases, the voltage decreases gradually without interruption. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A : Go to next step
3. INSPECT AIR MIX CONTROL SERVO MOTOR Remove the air mix control servo motor. Disconnect the connector from the air mix control servo motor. Measure the resistance according to the value(s) in the table below. Standard resistance AIR MIX CONTROL SERVO MOTOR (RESISTANCE) (1 OF 2) Tester connection (Symbols) Condition Specified condition A17-1 (VZ) - A17-2 (GND) Always 4.2 to 7.8 kohms Measure the resistance according to the value(s) in the table below. Standard resistance AIR MIX CONTROL SERVO MOTOR (RESISTANCE) (2 OF 2) Tester connection (Symbols) Condition Specified condition A17-3 (PT) - A17-2 (GND) MAX. COOL position 3.5 to 6.5 kohms A17-3 (PT) - A17-2 (GND) MAX. HOT position 0.7 to 1.3 kohms As the air mix control servo motor moves from the COOL side to HOT side, the resistance decreases gradually without interruption. HINT: For details regarding operation of the servo motor (See «DTC B1446/46 Air Mix Damper Control Servomotor Circuit (Driver Side)»(ref-236010-S28076703772006062900000) ). NG: REPLACE AIR MIX CONTROL SERVO MOTOR OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (AIR MIX CONTROL SERVO MOTOR - A/C AMPLIFIER ASSEMBLY) Disconnect the connector from the A/C amplifier assembly. Measure the resistance according to the value(s) in the table below. Standard resistance AIR MIX CONTROL SERVO MOTOR - A/C AMPLIFIER ASSEMBLY (RESISTANCE) Tester connection (Symbols) Condition Specified condition A7-9 (TPD) - A17-3 (PT) Always Below 1 ohms A7-20 (SG-1) - A17-2 (GND) Always Below 1 ohms A7-23 (S5-1) - A17-1 (VZ) Always Below 1 ohms A7-9 (TPD) - Body ground Always 10 kohms or higher A7-20 (SG-1) - Body ground Always 10 kohms or higher A7-23 (S5-1) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

The air mix control servo motor (air mix damper servo sub-assembly) is controlled by the A/C amplifier. The air mix control servo motor moves the air mix damper by rotating (normal, reverse) the motor with electrical power from the A/C amplifier assembly.

This adjusts the mix ratio of the air that passes through the evaporator and heater core and controls the air flow temperature. Air flow temperature changes when moving the air mix damper to the target point. The target point can be detected with the air mix damper position sensor.

DTC DETECTION CONDITION - TROUBLE AREA

Scheme 62

Scheme 63

Scheme 64

1. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the ignition switch ON and push the intelligent tester main switch on. Select the item in the DATA LIST, and read the display on the intelligent tester. DATA LIST / AIR CONDITIONER AIR CONDITIONER DATA LIST Item Measurement Item / Display (Range) Normal Condition Diagnostic Note A/M DAMP POS-P Air mix damper position (Passenger side) / min.: -14% max.: 113.5% Damper is at "MAX. COOL": -5% Damper is at "MAX. HOT": 105% - A/M DAMP TARG-P Air mix damper target position (Passenger side) / min.: -14% max.: 113.5% OK: When the target position is at the "MAX. COOL" (-5%), the actual opening angle is 19.0% or less. When the target position is at the "MAX. HOT" (105%), the actual opening angle is 81.0% or more. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A : Go to next step
2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the ignition switch ON and push the intelligent tester main switch on. Select the item below in the ACTIVE TEST and then check that the air flow temperature by hand. A: Go to next step ACTIVE TEST / AIR CONDITIONER AIR CONDITIONER ACTIVE TEST Item Test Details / Display (Range) Diagnostic Note AIR MIX DAMP-P Air mix damper (Passenger side) / min.: -14% max.: 113.5% - OK: When the lever is moved to the "MAX. HOT" side, warm air comes out. When the lever is moved to the "MAX. COOL" side, cool air comes out. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A : Go to next step
3. PERFORM ACTUATOR CHECK Set the actuator check mode (See «ACTUATOR CHECK»(ref-236010-S39200224022006062900000) ). Press the UPDr switch and change to the step operation. Check the air flow temperature by hand. DISPLAY CODE AND AIR MIX DAMPER OPERATION Display Code Air Mix Damper Operation 0 "COOL" side (-5%) 1 "COOL" side (-5%) 2 "COOL" side (-5%) 3 "COOL" side (-5%) 4 "COOL"/"HOT" (50.0% opened) 5 "COOL"/"HOT" (50.0% opened) 6 "COOL"/"HOT" (50.0% opened) 7 "HOT" side (105%) 8 "HOT" side (105%) 9 "HOT" side (105%) OK: Air flow temperature changes in accordance with each display code. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C: REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A: Go to next step
4. INSPECT AIR MIX CONTROL SERVO MOTOR Remove the air mix control servo motor. Disconnect the connector from the air mix control servo motor. Connect the positive (+) lead from the battery to terminal 5 and negative (-) lead to terminal 4, then check that lever turns to "MAX. HOT" position smoothly. OK: Lever turns to "MAX. HOT" position smoothly. Connect the positive (+) lead from the battery to terminal 4 and negative (-) lead to terminal 5, then check that lever turns to "MAX. COOL" position smoothly. OK: Lever turns to "MAX. COOL" position smoothly. NG : REPLACE AIR MIX CONTROL SERVO MOTOR OK : Go to next step
5. CHECK HARNESS AND CONNECTOR (AIR MIX CONTROL SERVO MOTOR - A/C AMPLIFIER ASSEMBLY) Disconnect the connector from the A/C amplifier assembly. Measure the resistance according to the value(s) in the table below. Standard resistance AIR MIX CONTROL SERVO MOTOR - A/C AMPLIFIER ASSEMBLY (RESISTANCE) Tester connection (Symbols) Condition Specified condition A7-16 (AMPC) - A18-4 (MCOOL) Always Below 1 ohms A7-24 (AMPH) - A18-5 (MHOT) Always Below 1 ohms A7-16 (AMPC) - Body ground Always 10 kohms or higher A7-24 (AMPH) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

The air inlet control servomotor is controlled by the A/C amplifier assembly and moves the air inlet control servo motor to the desired position.

The air inlet control servo motor switches between "RECIRCULATION" and "FRESH" by rotating the motor (normal, reverse) with electrical power from the A/C amplifier assembly. This controls intake air and switches "RECIRCULATION", "FRESH" and "HALF-RECIRCULATION".

DTC DETECTION CONDITION - TROUBLE AREA

Scheme 65

Scheme 66

Scheme 67

1. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the ignition switch ON and push the intelligent tester main switch on. Select the item below in the DATA LIST, and read the display on the intelligent tester. DATA LIST / AIR CONDITIONER AIR CONDITIONER DATA LIST Item Measurement Item / Display (Range) Normal Condition Diagnostic Note A/I DAMP POS Air inlet damper position / min.: -14% max.: 113.5% Damper is at "RECIRCULATION": -9% Damper is at "HALF-RECIRCULATION": 35 to 75% Damper is at "FRESH": 109% Open in the circuit: 50.0% A/I DAMP TARG Air inlet damper target position / min.: -14% max.: 113.5% OK: When the target position is at the "RECIRCULATION" (-9%), the actual opening angle is 19.0% or less. When the target position is at the "FRESH" (109%), the actual opening angle is 81.0% or more. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A : Go to next step
2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Remove the glove box to see and check the recirculation damper operation. Connect the intelligent tester to the DLC3. Turn the ignition switch ON and push the intelligent tester main switch on. Select the item below in the ACTIVE TEST and then check that the damper operates. ACTIVE TEST / AIR CONDITIONER AIR CONDITIONER ACTIVE TEST Item Test Details / Display (Range) Diagnostic Note A/I DAMP-LINEAR Air inlet damper position (linear) / min.: -14% max.: 113.5% - OK: Lever turns from "RECIRCULATION" side to "FRESH" side smoothly. Lever turns from "FRESH" side to "RECIRCULATION" side smoothly. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A : Go to next step
3. PERFORM ACTUATOR CHECK Remove the glove box to see and check the recirculation damper operation. Set the actuator check mode (See «ACTUATOR CHECK»(ref-236010-S39200224022006062900000) ). Press the UPDr switch in order and check the operation of recirculation damper. DISPLAY CODE AND RECIRCULATION DAMPER OPERATION Display Code Recirculation damper position 0 FRESH (109%) 1 FRESH (109%) 2 R/F (50%) 3 RECIRCULATION (-9%) 4 FRESH (109%) 5 FRESH (109%) 6 FRESH (109%) 7 FRESH (109%) 8 FRESH (109%) 9 FRESH (109%) OK: Recirculation damper position changes in accordance with each display code. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C: REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A: Go to next step
4. INSPECT AIR INLET CONTROL SERVO MOTOR Remove the damper air inlet control servo motor. Disconnect the connector from the air inlet control servo motor. Connect the positive (+) lead from the battery to terminal 5 and negative (-) lead to terminal 4 then check that the lever turns to "FRESH" position smoothly. OK: Lever turns to "FRESH" position smoothly. Connect the positive (+) lead from the battery to terminal 4 and negative (-) lead to terminal 5 then check that the lever turns to "RECIRCULATION" position smoothly. OK: Lever turns to "RECIRCULATION" position smoothly. NG : REPLACE AIR INLET CONTROL SERVO MOTOR OK : Go to next step
5. CHECK HARNESS AND CONNECTOR (AIR INLET CONTROL SERVO MOTOR - A/C AMPLIFIER ASSEMBLY) Disconnect the connector from the A/C amplifier assembly. Measure the resistance according to the value(s) in the table below. Standard resistance AIR INLET CONTROL SERVO MOTOR - A/C AMPLIFIER ASSEMBLY (RESISTANCE) Tester connection (Symbols) Condition Specified condition A7-3 (AIR) - A16-4 (MREC) Always Below 1 ohms A7-4 (AIF) - A16-5 (MFRS) Always Below 1 ohms A7-3 (AIR) - Body ground Always 10 kohms or higher A7-4 (AIF) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

This circuit turns the servo motor and changes each damper position by receiving the signals from the A/C amplifier assembly.

The air outlet damper servo switches the air outlet by rotating the motor (normal, reverse) with electrical power from the A/C amplifier assembly.

When the AUTO switch is on, the A/C amplifier assembly changes the mode between "FACE", "BI-LEVEL" and "FOOT" according to the temperature setting.

DTC DETECTION CONDITION - TROUBLE AREA

Scheme 68

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1. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the ignition switch ON and push the intelligent tester main switch on. Select the item below in the DATA LIST, and read the display on the intelligent tester. DATA LIST / AIR CONDITIONER AIR CONDITIONER DATA LIST Item Measurement Item / Display (Range) Normal Condition Diagnostic Note A/O DAMP POS Air outlet damper position / min.: -14% max.: 113.5% Damper is at "FACE": 0% Damper is at "FACE/FOOT": 33.5% Damper is at "FOOT" (Manual): 53.5% Damper is at "FOOT" (Auto): 53.5% Damper is at "FACE/DEF": 73.5% Damper is at "DEF": 100% Open in the circuit: 50.0% A/O DAMP TARG Air outlet damper target position / min.: -14% max.: 113.5% OK: When the target position is at the "FACE" (0%), the actual opening angle is 19.0% or less. When the target position is at the "DEF" (100%), the actual opening angle is 81.0% or more. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A : Go to next step
2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the ignition switch ON and push the intelligent tester main switch on. Select the item below in the ACTIVE TEST and then check that the air flow position by hand. ACTIVE TEST / AIR CONDITIONER AIR CONDITIONER ACTIVE TEST Item Test Details / Display (Range) Diagnostic Note A/O MODE DAMP-D Air outlet damper position (Driver side) / min.: -14% max.: 113.5% - OK: Air comes out from the selected air outlet. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A : Go to next step
3. PERFORM ACTUATOR CHECK Warm up the engine. Set the actuator check mode (See «ACTUATOR CHECK»(ref-236010-S39200224022006062900000) ). Press the UPDr switch and change to step operation. Press the UPDr switch and check the air flow by hand. DISPLAY CODE AND AIR FLOW CONDITION Display Code Air flow condition 0 FACE (0%) 1 FACE (0%) 2 FACE (0%) 3 FACE (0%) 4 B/L (33.5%) 5 FOOT (AUTO) (53.5%) 6 FOOT (MANUAL) (53.5%) 7 FOOT (MANUAL) (53.5%) 8 F/D (73.5%) 9 DEF (100%) OK: Air flow position changes in accordance with each display code. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C: REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A: Go to next step
4. INSPECT AIR OUTLET CONTROL SERVO MOTOR Remove the air outlet control servo motor. Disconnect the connector from the air outlet control servo motor. Connect the positive (+) lead from the battery to terminal 4 and negative (-) lead to terminal 5 then check that the lever turns to "DEF" position smoothly. OK: Lever turns to "DEF" position smoothly. Connect the positive (+) lead from the battery to terminal 5 and negative (-) lead to terminal 4 then check that the lever turn to "FACE" position smoothly. OK: Lever turns to "FACE" position smoothly. NG : REPLACE AIR OUTLET CONTROL SERVO MOTOR OK : Go to next step
5. CHECK HARNESS AND CONNECTOR (AIR OUTLET CONTROL SERVO MOTOR - A/C AMPLIFIER ASSEMBLY) Disconnect the connector from the A/C amplifier assembly. Measure the resistance according to the value(s) in the table below. Standard resistance AIR OUTLET CONTROL SERVO MOTOR - A/C AMPLIFIER ASSEMBLY (RESISTANCE) Tester connection (Symbols) Condition Specified condition A7-5 (AOF) - A19-5 (FACE) Always Below 1 ohms A7-6 (AOD) - A19-4 (DEF) Always Below 1 ohms A7-5 (AOF) - Body ground Always 10 kohms or higher A7-6 (AOD) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

The air mix control servo motor (air mix damper servo sub-assembly) is controlled by the A/C amplifier assembly.

The air mix control servo motor moves the air mix damper by rotating (normal, reverse) the motor with electrical power from the A/C amplifier assembly.

This adjusts the mix ratio of the air that passes through the evaporator and heater core and controls the air flow temperature. Air flow temperature changes when moving the air mix damper to the target point. The target point can be detected with the air mix damper position sensor.

DTC DETECTION CONDITION - TROUBLE AREA

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1. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the ignition switch ON and push the intelligent tester main switch on. Select the item below in the DATA LIST, and read the display on the intelligent tester. DATA LIST / AIR CONDITIONER AIR CONDITIONER DATA LIST Item Measurement Item / Display (Range) Normal Condition Diagnostic Note A/M DAMP POS-D Air mix damper position (Driver side) / min.: -14% max.: 113.5% Damper is at "MAX. COOL": -5% Damper is at "MAX. HOT": 105% - A/M DAMP TARG-D Air mix damper target position (Driver side) / min.: -14% max.: 113.5% OK: When the target position is at the "MAX. COOL" (-5%), the actual opening angle is 19.0% or less. When the target position is at the "MAX. HOT" (105%), the actual opening angle is 81.0% or more. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOM TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A : Go to next step
2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Turn the ignition switch ON and push the intelligent tester main switch on. Select the item below in the ACTIVE TEST and then check that the air flow temperature by hand. ACTIVE TEST / AIR CONDITIONER AIR CONDITIONER ACTIVE TEST Item Test Details / Display (Range) Diagnostic Note AIR MIX DAMP-D Air mix damper (Driver side) /min.: -14% max.: 113.5% - OK: When the lever is moved to the "MAX. HOT" side, warm air comes out. When the lever is moved to the "MAX. COOL" side, cool air comes out. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOM TABLE) B OK (Checking from the DTC) C B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A : Go to next step
3. PERFORM ACTUATOR CHECK Set the actuator check mode (See «ACTUATOR CHECK»(ref-236010-S39200224022006062900000) ). Press the DEF switch and change to the step operation. Check the air flow temperature by hand. DISPLAY CODE AND AIR MIX DAMPER OPERATION Display Code Air Mix Damper Operation 0 "COOL" side (-5%) 1 "COOL" side (-5%) 2 "COOL" side (-5%) 3 "COOL" side (-5%) 4 "COOL"/"HOT" (50% opened) 5 "COOL"/"HOT" (50% opened) 6 "COOL"/"HOT" (50% opened) 7 "HOT" side (105%) 8 "HOT" side (105%) 9 "HOT" side (105%) OK: Air flow temperature changes in accordance with each display code. Result OUTPUT RESULT TABLE Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOM TABLE) B OK (Checking from the DTC) C B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C: REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY A: Go to next step
4. INSPECT AIR MIX CONTROL SERVO MOTOR Remove the air mix control servo motor. Disconnect the connector from the air mix control servo motor. Connect the positive (+) lead from the battery to terminal 5 and negative (-) lead to terminal 4, then check that the lever turns to "MAX. HOT" position smoothly. OK: Lever turns to "MAX. HOT" position smoothly. Connect the positive (+) lead from the battery to terminal 4 and negative (-) lead to terminal 5, then check that the lever turns to "MAX. COOL" position smoothly. OK: Lever turns to "MAX. COOL" position smoothly. NG : REPLACE AIR MIX CONTROL SERVO MOTOR OK : Go to next step
5. CHECK HARNESS AND CONNECTOR (AIR MIX CONTROL SERVO MOTOR - A/C AMPLIFIER ASSEMBLY) Disconnect the connector from the A/C amplifier assembly. Measure the resistance according to the value(s) in the table below. Standard resistance AIR MIX CONTROL SERVO MOTOR - A/C AMPLIFIER ASSEMBLY (RESISTANCE) Tester connection (Symbols) Condition Specified condition A7-14 (AMDC) - A17-4 (MCOOL) Always Below 1 ohms A7-15 (AMDH) - A17-5 (MHOT) Always Below 1 ohms A7-14 (AMDC) - Body ground Always 10 kohms or higher A7-15 (AMDH) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

DTC DETECTION CONDITION - TROUBLE AREA

The air conditioning amplifier outputs the magnetic clutch ON signal from the MPX terminal to the ECM which receives this signal. It then sends the signal from the ACMG terminal and switches the magnetic clutch relay on, thus turning on the magnetic clutch.

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1. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to DLC3. Turn the ignition switch ON and push the intelligent tester main switch ON. Select the items below in the DATA LIST, and read the displays on the intelligent tester. ALL ALL DATA LIST Item Measurement Item / Display (Range) Normal Condition Diagnostic Note A/C SIG A/C signal / ON or OFF A/C ON: ON - NG : Go to step 7 OK : Go to next step
2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to DLC3. Turn the ignition switch ON and push the intelligent tester main switch ON. Select the item below in the ACTIVE TEST and then check that the relay operates. AC: AC ACTIVE TEST Item Test Details / Display (Range) Diagnostic Note A/C MAG CLUTCH Magnetic clutch relay / OFF, ON - NG : Go to step 3 OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
3. INSPECT ECM (ACMG - BODY GROUND) Remove the ECM with connectors still connected. Start the engine and push the AUTO switch. Measure the voltage according to the value(s) in the table below. Standard voltage ECM (ACMG - BODY GROUND) (VOLTAGE) Tester connection Condition Specified condition E6-2 (ACMG) - Body ground A/C switch OFF 11 to 14 V E6-2 (ACMG) - Body ground A/C switch ON Below 1 V Result OUTPUT RESULT TABLE Condition Proceed to OK A NG (Always 11 to 14 V) B NG (Always below 1.0 V) C B : REPLACE ECM C : Go to step 10 A : Go to next step
4. INSPECT MAGNETIC CLUTCH ASSEMBLY Disconnect the connector from the magnet clutch assembly. Connect the positive (+) lead from the battery to terminal 3 and negative (-) lead to terminal body ground, then check that the magnetic clutch assembly is engaged. NG : REPLACE MAGNET CLUTCH ASSEMBLY OK : Go to next step
5. CHECK HARNESS AND CONNECTOR (MAGNETIC CLUTCH ASSEMBLY - ENGINE ROOM JUNCTION BLOCK) Disconnect the connector from the engine room junction block. Measure the resistance according to the value(s) in the table below. Standard resistance MAGNETIC CLUTCH ASSEMBLY - ENGINE ROOM JUNCTION BLOCK (RESISTANCE) Tester connection Condition Specified condition 2B-10 (MGL) - A2-3 Always Below 1 ohms NG : REPAIR OR REPLACE HARNESS AND CONNECTOR OK : Go to next step
6. INSPECT ENGINE ROOM JUNCTION BLOCK (MGL - BODY GROUND) Start the engine and push AUTO switch. Measure the voltage according to the value(s) in the table below. Standard voltage ENGINE ROOM JUNCTION BLOCK (MGL - BODY GROUND) (VOLTAGE) Tester connection Condition Specified condition 2B-10 (MGL) - Body ground AUTO switch ON 11 to 14 V NG : REPLACE ENGINE ROOM JUNCTION BLOCK OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
7. CONFIRM MODEL Result: A: w/o LEXUS Navigation System B: w/ LEXUS Navigation System B : Go to step 9 A : Go to next step
8. REPLACE AIR CONDITIONING AMPLIFIER NG : REPLACE CENTER CLUSTER INTEGRATION SWITCH ASSEMBLY OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
9. REPLACE AIR CONDITIONING AMPLIFIER NG : REPLACE MULTI-DISPLAY ASSEMBLY OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
10. INSPECT ENGINE ROOM JUNCTION BLOCK (IG1 - BODY GROUND) Disconnect the connector. Measure the voltage according to the value(s) in the table below. Standard voltage ENGINE ROOM JUNCTION BLOCK (IG1 - BODY GROUND) (VOLTAGE) Tester connection Condition Specified condition 2B-9 (IG1) - Body ground Always 11 to 14 V NG : REPAIR OR REPLACE HARNESS AND CONNECTOR OK : Go to next step
11. CHECK HARNESS AND CONNECTOR (ENGINE ROOM JUNCTION BLOCK - ECM) Reconnect the connector to the engine room junction block. Disconnect the connector from the ECM. Measure the resistance according to the value(s) in the table below. Standard resistance ENGINE ROOM JUNCTION BLOCK - ECM (RESISTANCE) Tester connection Condition Specified condition 2H-10 (ACMG) - E6-2 (ACMG) Always Below 1 ohms NG : REPAIR OR REPLACE HARNESS AND CONNECTOR OK : Go to next step
12. INSPECT ECM (ACMG - BODY GROUND) Disconnect the connector. Measure the voltage according to the value(s) in the table below. Standard voltage ECM (ACMG - BODY GROUND) (VOLTAGE) Tester connection Condition Specified condition E6-2 (ACMG) - Body ground Always 11 to 14 V NG : REPLACE ENGINE ROOM JUNCTION BLOCK OK : REPLACE ECM

The heater relay is turned on by signals from the A/C amplifier assembly. It supplies power to the blower motor controller.

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1. CHECK HEATER FUSE Remove the HEATER fuse from the instrument panel J/B. Measure the resistance according to the value(s) in the table below. Standard resistance HEATER FUSE (RESISTANCE) Tester item Condition Specified condition HEATER fuse Always Below 1 ohms NG : REPLACE HEATER FUSE OK : Go to next step
2. INSPECT HEATER RELAY Remove the HEATER relay from the R/B No. 3. Measure the resistance according to the value(s) in the table below. Standard resistance HEATER RELAY (RESISTANCE) Tester connection Condition Specified condition 3 - 5 Always 10 kohms or higher 3 - 5 When battery voltage applied to terminals 1 and 2 Below 1 ohms 3 - 4 Always Below 1 ohms 3 - 4 When battery voltage applied to terminals 1 and 2 10 kohms or higher NG : REPLACE HEATER RELAY OK : Go to next step
3. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER ASSEMBLY - BODY GROUND) Remove the A/C amplifier assembly with the connectors still connected. Disconnect the connector from the A/C amplifier assembly. Measure the voltage according to the value(s) in the table below. Standard voltage A/C AMPLIFIER ASSEMBLY - BODY GROUND (VOLTAGE) Tester connection (Symbols) Condition Specified condition A8-18 (HR) - Body ground Ignition switch position OFF Blower switch position OFF Below 1 V A8-18 (HR) - Body ground Ignition switch position ON Blower switch position ON Below 1 V A8-18 (HR) - Body ground Ignition switch position ON Blower switch position OFF 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

This is the main power source supplied to the A/C amplifier assembly when the ignition switch is turned to the ON position. The power source is used for operating the A/C amplifier assembly and servomotor, etc.

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1. INSPECT ECU-IG NO. 1 FUSE Remove the ECU-IG No. 1 fuse from the instrument panel J/B. Measure the resistance according to the value(s) in the table below. Standard resistance ECU-IG NO. 1 FUSE (RESISTANCE) Tester item Condition Specified condition ECU-IG No. 1 fuse Always Below 1 ohms NG : REPLACE ECU-IG NO. 1 FUSE OK : Go to next step
2. INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY Remove the A/C amplifier assembly with the connectors still connected. Measure the voltage according to the value(s) in the table below. Standard voltage TESTER CONNECTION - SPECIFIED CONDITION (VOLTAGE) Tester connection (Symbols) Condition Specified condition A8-1 (IG+) - A8-6 (GND) Ignition switch ON 10 to 14 V NG : Go to step 3 OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
3. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER ASSEMBLY - BODY GROUND) Disconnect the connector from the A/C amplifier assembly. Measure the voltage according to the value(s) in the table below. Standard voltage A/C AMPLIFIER ASSEMBLY - BODY GROUND (VOLTAGE) Tester connection (Symbols) Condition Specified condition A8-1 (IG+) - Body ground Ignition switch ON 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : Go to next step
4. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER ASSEMBLY - BODY GROUND) Measure the resistance according to the value(s) in the table below. Standard resistance A/C AMPLIFIER ASSEMBLY - BODY GROUND (RESISTANCE) Tester connection (Symbols) Condition Specified condition A8-6 (GND) - Body ground Always Below 1 ohms NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

This is the back-up power source circuit for the A/C amplifier assembly. Power is supplied even when turning the ignition switch off and is used for diagnostic trouble code memory, etc.

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1. INSPECT ECU-B NO. 1 FUSE Remove the ECU-B No. 1 fuse from the fusible link block. Measure the resistance according to the value(s) in the table below. Standard resistance ECU-B NO. 1 FUSE (RESISTANCE) Tester item Condition Specified condition ECU-B No. 1 fuse Always Below 1 ohms NG : REPLACE ECU-B NO. 1 FUSE OK : Go to next step
2. INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY Remove the A/C amplifier assembly with the connectors still connected. Measure the voltage according to the value(s) in the table below. Standard voltage AIR CONDITIONING AMPLIFIER ASSEMBLY (VOLTAGE) Tester connection (Symbols) Condition Specified condition A8-2 (B) - A8-6 (GND) Always 10 to 14 V NG : Go to step 3 OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
3. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER ASSEMBLY - BODY GROUND) Disconnect the connector from the A/C amplifier assembly. Measure the voltage according to the value(s) in the table below. Standard voltage A/C AMPLIFIER ASSEMBLY - BODY GROUND (VOLTAGE) Tester connection (Symbols) Condition Specified condition A8-2 (B) - Body ground Always 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : Go to next step
4. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER ASSEMBLY - BODY GROUND) Measure the resistance according to the value(s) in the table below. Standard resistance A/C AMPLIFIER ASSEMBLY - BODY GROUND (RESISTANCE) Tester connection (Symbols) Condition Specified condition A8-6 (GND) - Body ground Always Below 1 ohms NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

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1. INSPECT REFRIGERANT VOLUME Check the sight glass on the air conditioning tube & accessory assembly. Prepare the vehicle according the chart below. ITEM CONDITIONS Item Condition Vehicle door Fully open Temperature setting MAX COLD Blower speed HI A/C ON Compare the sight glass to the following chart. SIGHT GLASS COMPARISON Item Symptom Amount of refrigerant Corrective Actions 1 Bubbles exist Insufficient (1) Check for gas leakage and repair if necessary Add refrigerant until bubbles disappear 2 No bubbles exist (DTC 76 is output) Empty, insufficient or excessive Refer to 3 and 4 3 No temperature difference between compressor inlet and outlet Empty or nearly empty Check for gas leakage and repair if necessary Evacuate the AC system and recharge the proper amount of refrigerant 4 Considerable temperature difference between compressor inlet and outlet. Proper or excessive Refer to 5 and 6 5 Immediately after air conditioning is turned off, refrigerant remains clear Excessive Discharge refrigerant Evacuate the AC system and recharge the proper amount of refrigerant 6 Immediately after air conditioning is turned off, refrigerant foams and then becomes clear Proper - (1) Bubbles in the sight glass with the vehicle's interior above 35°C (95°F) can be considered normal if cooling is sufficient.
2. INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET HINT: This is a method where a manifold gauge set is used to help locate the problem. Read the manifold gauge pressure when these conditions are established. Test conditions: Temperature at the air inlet with the switch set at RECIRC is 30 to 35°C (86 to 95°F) Engine is running at 1,500 rpm Blower speed control switch is at "HI" Temperature control dial is at "COOL" A/C switch is ON Doors are fully open Ignition switch in a position that enables the AC compressor to run. Normally functioning refrigeration system Gauge reading: Low pressure side: 0.15 to 0.25 MPa (1.5 to 2.5 kgf/cm 2 , 21.3 to 35.5 psi) High pressure side: 1.37 to 1.57 MPa (14 to 16 kgf/cm 2 , 199.1 to 227.5 psi) Moisture is present in refrigeration system. MOISTURE IS PRESENT IN REFRIGERATION SYSTEM Symptom Probable cause Diagnosis Corrective Actions During operation, pressure on low pressure side cycles between normal and vacuum Moisture in AC system will freeze at the expansion valve orifice, causing the refrigeration cycle to temporarily stop After the system stop, and warms up again, the ice will melt and normal operation will be temporarily restored Dryer in oversaturated state Moisture in refrigeration system freezes at expansion valve orifice and blocks circulation of refrigerant Replace condenser Remove moisture in system by repeatedly evacuating air Supply a proper amount of new refrigerant Insufficient cooling INSUFFICIENT COOLING Symptom Probable cause Diagnosis Corrective Actions Pressure is low on both low and high pressure sides Bubbles are seen through sight glass continuously Insufficient cooling performance Gas leakage from the refrigeration system Insufficient refrigerant Refrigerant leaking Check for gas leakage and repair if necessary Supply a proper amount of new refrigerant If the gauge indicates a pressure of close to 0, then it will be necessary to evacuate the system after repairing the leak Poor circulation of refrigerant POOR CIRCULATION OF REFRIGERANT Symptom Probable cause Diagnosis Corrective Actions Pressure is low on both low and high pressure sides Frost exists on pipe from condenser to unit Refrigerant flow is obstructed by dirt inside the pipes of the condenser core Receiver is clogged Replace condenser Refrigerant does not circulate. REFRIGERANT DOES NOT CIRCULATE Symptom Probable cause Diagnosis Corrective Actions Vacuum is indicated on low pressure side and very low pressure is indicated on high pressure side Frost or condensation is seen on piping on both sides of receiver/drier or expansion valve Refrigerant flow is obstructed by moisture or dirt in refrigeration system Refrigerant flow disrupted by gas leaking internally through the expansion valve Refrigerant does not circulate Check the expansion valve Replace expansion valve Replace condenser Evaporate air and supply a proper amount of new refrigerant For internal gas leak at expansion valve, replace expansion valve Refrigerant is overcharged or cooling effectiveness of condenser is insufficient. REFRIGERANT IS OVERCHARGED OR COOLING EFFECTIVENESS OF CONDENSER IS INSUFFICIENT Symptom Probable cause Diagnosis Corrective Actions Pressure is too high on both low and high pressure sides No air bubbles are seen through sight glass even when engine rpm lowers Unable to develop sufficient performance due to excessive use of refrigeration system Cooling effectiveness of condenser is insufficient Excessive refrigerant in cycle --> excessive refrigerant was recharged Condenser cooling effectiveness is insufficient --> condenser fins are clogged at cooling fan Clean condenser Check the operation of the condenser cooling fan If 1 and 2 are normal state, check the amount of refrigerant and supply proper amount of refrigerant Air is present in refrigeration system. AIR IS PRESENT IN REFRIGERATION SYSTEM Symptom Probable cause Diagnosis Corrective Actions Pressure is too high on both low and high pressure sides The low pressure piping is too hot to touch Bubbles can be seen through sight glass Air in system Air present in refrigeration system Insufficient vacuum purging Check compressor oil to see if it is dirty or insufficient Evacuate the system and recharge it with new or purified refrigerant Expansion valve malfunction EXPANSION VALVE MALFUNCTION Symptom Probable cause Diagnosis Corrective Actions Pressure is too high on both low and high pressure sides Frost or a large amount of condensation on piping on low pressure side Expansion valve may be sticking Excessive refrigerant in low pressure piping Expansion valve opened too wide Check expansion valve Insufficient compressor compression INSUFFICIENT COMPRESSOR COMPRESSION Symptom Probable cause Diagnosis Corrective Actions Pressure is too high both on low and high pressure sides Pressure is too low on high pressure side Internal leak in compressor Low compression Leak from a damaged valve, or parts may be broken Replace compressor Gauge readings (Reference)

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1. DISCHARGE REFRIGERANT FROM REFRIGERATION SYSTEM Turn the A/C switch on. Operate the A/C with the setting temperature at 25°C (77°F) and the blower level at LO for 10 minutes to circulate the refrigerant and collect compressor oil remaining in each component into the cooler compressor as much as possible. Turn the ignition switch OFF. Using SST, let the refrigerant gas out. SST 07110--58060 (07117--58080, 07117--58090, 07117--78050, 07117--88060, 07117--88070, 07117--88080)
2. CHARGE WITH REFRIGERANT Perform vacuum purging using a vacuum pump. Charge with refrigerant HFC-134a (R134a). Standard: 550 to 650 g (19.4 to 22.9 oz.) SST 07110--58060 (07117--58060, 07117--58070, 07117--58080, 07117--58090, 07117--78050, 07117--88060, 07117--88070, 07117--88080) NOTE: Do not turn the A/C on before charging with refrigerant because the compressor will overheat as a result of the cooler compressor not working properly without refrigerant. Approximately 100 g (3.53 oz.) of refrigerant may need to be charged after bubbles disappear. The refrigerant amount should be checked by quantity, and not with the sight glass. Avoid using the gauge manifold set that had been used for vehicles with conventional compressor oil (ND-OIL8 or equivalent) as much as possible. This will cause compressor oil remaining in the manifold to enter the vehicle, resulting in insulation performance deterioration. A gauge manifold set that had been used 3 times or less can be reused if an appropriate one is not available. HINT: Prepare a service can to recharge refrigerant if using the refrigerant gas collected with the freon collection/recycling device because the collective rate of the device is approximately 90%.
3. WARM UP COMPRESSOR Keep the A/C switch on for at least 2 minutes to warm up the compressor. NOTE: Be sure to warm up the compressor when turning the A/C on after removing and installing the cooler refrigerant lines (including the compressor), to prevent damage to the compressor.
4. CHECK FOR LEAKAGE OF REFRIGERANT After recharging refrigerant gas, check for leakage of refrigerant gas using a halogen leak detector. Carry out the test under the following conditions: IG OFF Secure good ventilation (the gas leak detector may react to volatile gases which are not refrigerant, such as evaporated gasoline and exhaust gas). Repeat the test 2 or 3 times. Make sure that there is some refrigerant remaining in the refrigeration system. When the compressor is off: approx. 392 to 588 kPa (4 to 6 kgf/cm 2 , 57 to 85 psi) Using a gas leak detector, check for leakage of the refrigerant line. Bring the gas leak detector close to the drain hose with the detector's power off. HINT: After the blower motor has stopped, let the cooling unit stand for more than 15 minutes. Bring the gas leak detector sensor under the drain hose. When bringing the gas leak detector close to the drain hose, make sure that the gas leak detector does not react to volatile gases. If such reaction is unavoidable, the vehicle must be lifted up. If a gas leak is not detected on the drain hose, remove the blower motor control from the cooling unit. Insert the gas leak detector sensor into the unit and perform the test. Disconnect the pressure switch connector and leave it for approximately 20 minutes. Bring the gas leak detector close to the pressure switch and perform the test.

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1. DISCHARGE REFRIGERANT FROM REFRIGERATION SYSTEM HINT: See «REPLACEMENT»(ref-236010-S26306050922006062900000).
2. DISCONNECT BATTERY NEGATIVE TERMINAL CAUTION: Wait for 90 seconds after disconnecting the cable to prevent the airbag working.
3. REMOVE FRONT WIPER ARM AND BLADE ASSEMBLY RH (See «REMOVAL»(ref-236012-S31141822122006062900000) )
4. REMOVE FRONT WIPER ARM AND BLADE ASSEMBLY LH (See «REMOVAL»(ref-236012-S31141822122006062900000) )
5. REMOVE COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY (See «REMOVAL»(ref-236012-S31141822122006062900000) )
6. REMOVE WINDSHIELD WIPER LINK ASSEMBLY (See «REMOVAL»(ref-236012-S31141822122006062900000) )
7. REMOVE COWL TOP PANEL OUTER SUB-ASSEMBLY (See «REMOVAL»(ref-236012-S31141822122006062900000) )
8. DISCONNECT AIR CONDITIONING TUBE AND ACCESSORY ASSEMBLY Install SST on the piping clamp. SST 09870-00025 HINT: Make sure the direction of the piping clamp and SST by seeing the illustration shown on the caution label. Push down SST and release the clamp lock. NOTE: Do not deform the tube when pushing the SST. Pull the SST slightly and push the release lever, and then remove the piping clamp with SST. Disconnect the air conditioning tube and accessory assembly. NOTE: Do not use tools like a screwdriver to remove the tube. Cap the open fittings immediately to keep moisture or dirt out of the system. Remove the 2 O-rings from the air conditioning tube and accessory assembly.
9. DISCONNECT COOLER REFRIGERANT SUCTION HOSE NO. 1 SST 09870-00015 HINT: Disconnection of the cooler refrigerant suction hose No. 1 is the same as the air conditioning tube and accessory assembly.
10. DISCONNECT HEATER WATER OUTLET HOSE Using pliers, grip the claws of the clip and slide the clip, and then disconnect the heater water outlet hose. NOTE: Do not apply any excessive force to the heater water outlet hose. Prepare a drain pan or cloth for cooling water leaks.
11. DISCONNECT HEATER WATER INLET HOSE HINT: Disconnection of the heater water inlet hose is same as the heater water outlet hose.
12. REMOVE INSTRUMENT PANEL ASSEMBLY HINT: Refer to the instructions for removal of the instrument panel assembly (See «REMOVAL»(/lexus/rx/ii-facelift-2006-2009/remont/gauges-instrument-panels/#instrument-panel) ).
13. REMOVE AIR CONDITIONER AMPLIFIER ASSEMBLY (See «REMOVAL»(ref-236010-S41135529842006062900000) )
14. REMOVE AIR DUCT REAR NO. 2 Turn back the floor carpet. HINT: Turn back the floor carpet so that the air duct rear No. 2 can be removed. Release the claw and remove the air duct rear No. 2.
15. REMOVE AIR DUCT REAR NO. 1 Turn back the floor carpet. HINT: Turn back the floor carpet so that the air duct rear No. 1 can be removed. Release the claw and remove the air duct rear No. 1.
16. REMOVE AIR DUCT NO. 1 Remove the bolt. Release the 3 claws and remove the air duct No. 1.
17. DISCONNECT TRANSMISSION CONTROL CABLE ASSEMBLY HINT: See «REMOVAL»(ref-236002-S01646754142006062900000) for U151E, «REMOVAL»(/lexus/rx/ii-facelift-2006-2009/remont/automatic-trans/#automatic-transmission-u151f) for U151F.
18. REMOVE SHIFT LEVER HINT: See «REMOVAL»(ref-236002-S06862330422006062900000) for U151E, «REMOVAL»(/lexus/rx/ii-facelift-2006-2009/remont/automatic-trans/#automatic-transmission-u151f) for U151F.
19. REMOVE INSTRUMENT PANEL BRACKET NO. 4 Remove the 4 nuts and instrument panel bracket No. 4.
20. REMOVE INSTRUMENT PANEL BRACE NO. 1 SUB-ASSEMBLY Remove the clamp and disconnect the connector. Remove the 3 bolts and 2 nuts and instrument panel brace No. 1 sub-assembly.
21. REMOVE INSTRUMENT PANEL BRACE NO. 2 SUB-ASSEMBLY Remove the clamp and disconnect the connector. Remove the 3 bolts and 2 nuts and instrument panel brace No. 2 sub-assembly.
22. SEPARATE STEERING INTERMEDIATE SHAFT SUB-ASSEMBLY (Manual Tilt Type) (See «REMOVAL»(ref-235995-S24764790932006062900000) )
23. SEPARATE STEERING INTERMEDIATE SHAFT SUB-ASSEMBLY (Power Tilt and Power Type) (See «REMOVAL»(ref-235995-S36170728582006062900000) )
24. REMOVE STEERING COLUMN ASSEMBLY (Manual Tilt Type) (See «REMOVAL»(ref-235995-S24764790932006062900000) )
25. REMOVE STEERING COLUMN ASSEMBLY (Power Tilt and Power Type) (See «REMOVAL»(ref-235995-S36170728582006062900000) )
26. REMOVE AIR DUCT NO. 1 SUB-ASSEMBLY Remove the 3 nuts and air duct No. 1 sub-assembly.
27. REMOVE INSTRUMENT PANEL REINFORCEMENT ASSEMBLY Remove the 4 bolts and 4 nuts. Remove the clamp. Disconnect the connectors. Remove the 9 bolts and the 2 nuts and then remove the instrument panel reinforcement while holding the air conditioner unit assembly. HINT: Make sure to hold the air conditioner unit assembly securely as its bracket installation parts may be damaged.
28. REMOVE AIR CONDITIONER UNIT ASSEMBLY Remove the 2 nuts and air conditioner unit assembly. HINT: Make sure to hold the air conditioner unit assembly securely as its bracket installation parts may be damaged.
29. REMOVE AIR DUCT NO. 2 Remove the screw. Release the 2 claws and remove the air duct No. 2.
30. REMOVE WIRING AIR INDICATOR HARNESS NO. 2 SUB-ASSEMBLY Remove the 3 screws. Remove the clamp and disconnect the 2 connectors. Remove the wiring air indicator harness No. 2 sub-assembly.
31. REMOVE BLOWER ASSEMBLY Remove the screw. Release the claw and remove the blower assembly.

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1. REMOVE HEATER TO REGISTER DUCT CENTER Release the 4 claws and remove the heater to register duct center.
2. REMOVE AIR OUTLET CONTROL SERVO MOTOR Remove the 3 screws and air outlet control servomotor.
3. REMOVE AIR MIX CONTROL SERVO MOTOR LH side: Remove the 3 screws and air mix control servomotor. RH side: Remove the 3 screws and air mix control servomotor.
4. REMOVE EVAPORATOR TEMPERATURE SENSOR Release the clamp and connector. Release the 2 claws and remove evaporator temperature sensor.
5. REMOVE HEATER RADIATOR UNIT SUB-ASSEMBLY Remove the 2 screws and piping cover. Remove the screw and bracket. Remove the heater radiator unit sub-assembly. NOTE: Prepare a drain pan or cloth for cooling water leaks.
6. REMOVE AIR CONDITIONING TUBE ASSEMBLY Remove the packing. Using a hexagon wrench 4.0 mm, remove the 2 hexagon bolts and air conditioning tube assembly. Remove the 2 O-rings from the air conditioning tube assembly.
7. REMOVE COOLER EXPANSION VALVE Remove the cooler expansion valve from the cooler evaporator sub-assembly No. 1.
8. REMOVE COOLER EVAPORATOR NO. 1 SUB-ASSEMBLY Remove the 3 screws and air duct sub-assembly. Release the 4 claws and remove the air duct sub-assembly. Remove the 11 screws and separate the heater case. Remove the cooler evaporator No. 1 sub-assembly. Remove the 2 O-rings from the cooler evaporator No. 1 sub-assembly.

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1. INSTALL COOLER EVAPORATOR NO. 1 SUB-ASSEMBLY Sufficiently apply compressor oil to 2 new O-rings and fitting surface of the cooler expansion valve. Compressor oil: ND-OIL 11 or equivalent NOTE: Do not use any compressor oil other than ND-OIL 11 or equivalent. If any compressor oil other than ND-OIL 11 or equivalent is used, compressor motor insulation performance may decrease, resulting in leakage of electric power. Install the 2 O-rings on the cooler evaporator No. 1 sub-assembly. Install the cooler evaporator No. 1 sub-assembly to the heater case. Install the heater case with the 11 screws. Install the air duct sub-assembly with the 4 claws. Install the air duct sub-assembly with the 3 screws.
2. INSTALL COOLER EXPANSION VALVE Install the cooler expansion valve to the cooler evaporator No. 1 sub-assembly.
3. INSTALL AIR CONDITIONING TUBE ASSEMBLY Sufficiently apply compressor oil to 2 new O-rings and fitting surface of the air conditioning tube assembly. Compressor oil: ND-OIL 11 or equivalent NOTE: Do not use any compressor oil other than ND-OIL 11 or equivalent. If any compressor oil other than ND-OIL 11 or equivalent is used, compressor motor insulation performance may decrease, resulting in leakage of electric power. Install the 2 O-rings on the air conditioning tube assembly. Using a hexagon wrench 4.0 mm, install the air conditioning tube assembly with the 2 hexagon bolts. Torque: 3.5 N*m (35 kgf*cm, 30 in.*lbf) Install a new packing. NOTE: Be sure to install the packing securely so that there is no clearance. Wrap the packing with a shop rag or a piece of cloth as shown in the illustration to prevent moisture from entering.
4. INSTALL HEATER RADIATOR UNIT SUB-ASSEMBLY Install the heater radiator unit sub-assembly. Install the bracket with the screw. Install the piping cover with the 2 screws.
5. INSTALL EVAPORATOR TEMPERATURE SENSOR Engage the 2 claws to install the evaporator temperature sensor. Engage the clamp to install the connector.
6. INSTALL AIR MIX CONTROL SERVO MOTOR LH side: Install the air mix control servomotor with the 3 screws. RH side: Install the air mix control servomotor with the 3 screws.
7. INSTALL AIR OUTLET CONTROL SERVO MOTOR Install the air outlet control servomotor with the 3 screws.
8. INSTALL HEATER TO REGISTER DUCT CENTER Engage the 4 clamps to install the heater to register duct center.

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1. INSTALL BLOWER ASSEMBLY Engage the claw to install the blower assembly.
2. INSTALL WIRING AIR INDICATOR HARNESS NO. 2 SUB-ASSEMBLY Install the wiring air indicator harness No. 2 sub-assembly with the 3 screws. Connect the connectors and clamp.
3. INSTALL AIR DUCT NO. 2 Install the air duct No. 2 with the screw. Torque: 2.5 N*m (25 kgf*cm, 22 in.*lbf)
4. TEMPORARILY TIGHTEN AIR CONDITIONER UNIT ASSEMBLY Temporarily tighten the air conditioner unit assembly with the 2 nuts. HINT: Make sure to hold the air conditioner unit assembly securely as its bracket installation parts may be damaged.
5. INSTALL INSTRUMENT PANEL REINFORCEMENT ASSEMBLY Install the instrument panel reinforcement with the 8 bolts. Torque: 20 N*m (204 kgf*cm, 15 ft.*lbf) Temporarily tighten the air conditioner unit assembly with the 2 nuts and bolt. Install the 4 bolts and 4 nuts. Install the clamps. Connect the connectors.
6. INSTALL INSTRUMENT PANEL BRACE NO. 2 SUB-ASSEMBLY Install the instrument panel brace No. 2 sub-assembly with the 3 bolts and 2 nuts. Install the clamps and connect the connectors.
7. INSTALL INSTRUMENT PANEL BRACE NO. 1 SUB-ASSEMBLY Install the instrument panel brace No. 1 sub-assembly with the 3 bolts and 2 nuts. Install the clamps and connect the connectors.
8. INSTALL INSTRUMENT PANEL BRACKET NO.4
9. INSTALL AIR DUCT NO. 1 SUB-ASSEMBLY Install the air duct No. 1 sub-assembly with the 3 nuts. Torque: 9.8 N*m (100 kgf*cm, 87 in.*lbf) NOTE: Tighten the bolts in numerical order shown in the illustration to install the air duct No. 1 sub-assembly.
10. FULLY TIGHTEN AIR CONDITIONER UNIT ASSEMBLY Fully tighten the air conditioner unit assembly with the 3 bolts and 4 nuts. Torque: 9.8 N*m (100 kgf*cm, 87 in.*lbf) NOTE: Tighten the bolts in numerical order shown in the illustration to install the air conditioner unit assembly. Install the air conditioner unit assembly so that there is no clearance between the duct and blower assemblies.
11. INSTALL STEERING COLUMN ASSEMBLY (Manual Tilt Type) (See «INSTALLATION»(ref-235995-S16999507752006062900000) )
12. INSTALL STEERING COLUMN ASSEMBLY (Power Tilt and Power Type) (See «INSTALLATION»(ref-235995-S10471810732006062900000) )
13. CONNECT STEERING INTERMEDIATE SHAFT SUB-ASSEMBLY (Manual Tilt Type) (See «INSTALLATION»(ref-235995-S16999507752006062900000) )
14. INSTALL STEERING INTERMEDIATE SHAFT SUB-ASSEMBLY (Power Tilt and Power Type) (See «INSTALLATION»(ref-235995-S10471810732006062900000) )
15. INSTALL AIR DUCT NO. 1 Install the air duct No. 1 with the bolt. Torque: 9.8 N*m (100 kgf*cm, 87 in.*lbf)
16. INSTALL AIR CONDITIONER AMPLIFIER ASSEMBLY
17. INSTALL SHIFT LEVER HINT: See «INSTALLATION»(ref-236002-S05311448122006062900000) for U151E, «INSTALLATION»(/lexus/rx/ii-facelift-2006-2009/remont/automatic-trans/#automatic-transmission-u151f) for U151F.
18. CONNECT TRANSMISSION CONTROL CABLE ASSEMBLY HINT: See «INSTALLATION»(ref-236002-S11285199602006062900000) for U151E, «INSTALLATION»(/lexus/rx/ii-facelift-2006-2009/remont/automatic-trans/#automatic-transmission-u151f) for U151F.
19. INSPECT SHIFT LEVER POSITION
20. ADJUST SHIFT LEVER POSITION HINT: See «REASSEMBLY»(ref-236002-S35151391482006062900000) for U151E, «REASSEMBLY»(/lexus/rx/ii-facelift-2006-2009/remont/automatic-trans/#automatic-transmission-u151f) for U151F.
21. INSTALL AIR DUCT REAR NO. 1
22. INSTALL AIR DUCT REAR NO. 2
23. INSTALL INSTRUMENT PANEL ASSEMBLY HINT: Refer to the installation procedures for the instrument panel assembly (See «INSTALLATION»(/lexus/rx/ii-facelift-2006-2009/remont/gauges-instrument-panels/#instrument-panel) ).
24. INSTALL HEATER WATER INLET HOSE
25. INSTALL HEATER WATER OUTLET HOSE
26. INSTALL COOLER REFRIGERANT SUCTION PIPE NO. 1 Remove the attached vinyl tape from the hose. Coat a new O-ring with compressor oil and install it to the hose. Compressor oil: ND-OIL 11 or equivalent NOTE: Do not use any compressor oil other than ND-OIL 11 or equivalent. If any compressor oil other than ND-OIL 11 or equivalent is used, compressor motor insulation performance may decrease, resulting in leakage of electric power. Install the cooler refrigerant suction pipe No. 1 and piping clamp. HINT: Be sure to connect the hose securely. After connection, check the fitting for the claw of the piping clamp.
27. INSTALL AIR CONDITIONING TUBE AND ACCESSORY ASSEMBLY Remove the attached vinyl tape from the hose. Coat a new O-ring with compressor oil and install it to the pipe. Compressor oil: ND-OIL 11 or equivalent NOTE: Do not use any compressor oil other than ND-OIL 11 or equivalent. If any compressor oil other than ND-OIL 11 or equivalent is used, compressor motor insulation performance may decrease, resulting in leakage of electric power. Install the air conditioning tube and accessory assembly and piping clamp. HINT: Be sure to connect the hose securely. After connection, check the fitting for the claw of the piping clamp.
28. INSTALL COWL TOP PANEL OUTER SUB-ASSEMBLY (See «INSTALLATION»(/lexus/rx/ii-facelift-2006-2009/remont/accessory-drive-belts/#engine-mechanical-3mz-fe) )
29. INSTALL WINDSHIELD WIPER LINK ASSEMBLY (See «INSTALLATION»(ref-236012-S30773733982006062900000) )
30. INSTALL COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY
31. INSTALL FRONT WIPER ARM AND BLADE ASSEMBLY LH (See «INSTALLATION»(ref-236012-S30773733982006062900000) )
32. INSTALL FRONT WIPER ARM AND BLADE ASSEMBLY RH (See «INSTALLATION»(ref-236012-S30773733982006062900000) )
33. ADD ENGINE COOLANT HINT: See «COOLANT»(ref-235999-S00112711132006062900000).
34. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
35. CHARGE REFRIGERANT HINT: See «REPLACEMENT»(ref-236010-S26306050922006062900000).
36. WARM UP COMPRESSOR HINT: See «REPLACEMENT»(ref-236010-S26306050922006062900000).
37. CHECK FOR ENGINE COOLANT LEAKS HINT: See «ON-VEHICLE INSPECTION»(ref-235999-S42841828802006062900000).
38. CHECK FOR LEAKAGE OF REFRIGERANT HINT: See «REPLACEMENT»(ref-236010-S26306050922006062900000).
39. REMOVE PERFORM INITIALIZATION NOTE: Some systems need initialization when disconnecting the cable from the negative battery terminal.

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1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
2. REMOVE FRONT DOOR SCUFF PLATE RH
3. REMOVE COWL SIDE TRIM RH SUB-ASSEMBLY
4. REMOVE INSTRUMENT PANEL UNDER COVER NO. 2 SUB-ASSEMBLY (See «REMOVAL»(/lexus/rx/ii-facelift-2006-2009/remont/gauges-instrument-panels/#instrument-panel) )
5. REMOVE GLOVE COMPARTMENT DOOR ASSEMBLY (See «REMOVAL»(/lexus/rx/ii-facelift-2006-2009/remont/gauges-instrument-panels/#instrument-panel) )
6. REMOVE AIR DUCT NO. 2 Remove the screw. Release the 2 claws and remove the air duct No. 2.
7. DISCONNECT WIRING AIR INDICATOR HARNESS NO. 2 SUB-ASSEMBLY Remove the clamp and disconnect the 2 connectors.
8. REMOVE BLOWER ASSEMBLY Remove the clamp and disconnect the connectors. Remove the 4 screws and the nut, and then the bracket. Remove the bolt and 2 screws. Release the claw and remove the blower assembly.

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Scheme 181

1. REMOVE AIR INLET SERVO MOTOR Remove the 3 screws and air inlet servomotor.
2. REMOVE COOLING UNIT MOTOR WITH FAN SUB-ASSEMBLY Remove the 3 screws and cooling unit motor with fan sub-assembly.
3. REMOVE BLOWER MOTOR CONTROL Remove the 2 screws and blower motor control.
4. REMOVE CLEAN AIR FILTER Release the 2 claws and remove the air filter sub-assembly. Remove the air refiner element from the air filter cover plate.

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1. INSTALL CLEAN AIR FILTER Install the clean air filter. Engage the 2 claws to install the air filter sub-assembly.
2. INSTALL BLOWER MOTOR CONTROL Install the blower motor control with the 2 screws.
3. INSTALL COOLING UNIT MOTOR WITH FAN SUB-ASSEMBLY Install the cooling unit motor with fan sub-assembly with the 3 screws.
4. INSTALL AIR INLET SERVO MOTOR Install the air inlet servomotor with the 3 screws.

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1. INSTALL BLOWER ASSEMBLY Install the blower assembly with the claw. Install the bolt and 2 screws. Torque: BOLT 9.8 N*m (100 kgf*cm, 87 in.*lbf) Install the bracket with the 4 screws and nut. Torque: NUT 9.8 N*m (100 kgf*cm, 87 in.*lbf) Install the clamp and connect the connectors.
2. INSTALL WIRING AIR INDICATOR HARNESS NO. 2 SUB-ASSEMBLY
3. INSTALL AIR DUCT NO. 2 Install the air duct No. 2 with the screw. Torque: 2.5 N*m (25 kgf*cm, 22 in.*lbf)
4. INSTALL GLOVE COMPARTMENT DOOR ASSEMBLY (See «INSTALLATION»(/lexus/rx/ii-facelift-2006-2009/remont/gauges-instrument-panels/#instrument-panel) )
5. INSTALL INSTRUMENT PANEL UNDER COVER NO. 2 SUB-ASSEMBLY (See «INSTALLATION»(/lexus/rx/ii-facelift-2006-2009/remont/gauges-instrument-panels/#instrument-panel) )
6. INSTALL COWL SIDE TRIM RH SUB-ASSEMBLY
7. INSTALL FRONT DOOR SCUFF PLATE RH
8. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
9. PERFORM INITIALIZATION NOTE: Some systems need initialization when disconnecting the cable from the negative battery terminal.

Scheme 190

1. INSPECT COOLING UNIT MOTOR SUB-ASSEMBLY W/FAN Remove the cooling unit motor sub-assembly w/ fan. Connect the negative (-) lead connected to terminal 1 of the blower motor connector, the positive (+) lead to terminal 2. OK: Blower motor operates smoothly.

Scheme 191

1. INSPECT AIR INLET CONTROL SERVO MOTOR Remove the air inlet control servo motor. Connect the positive (+) lead from the battery to terminal 5 and negative (-) lead to terminal 4, then check that the lever turns to "FRESH" side smoothly. Connect the positive (+) lead from the battery to terminal 4 and negative (-) lead to terminal 5, then check that the lever turns to "RECIRCULATION" side smoothly. NOTE: While using the battery during inspection, do not bring the positive and negative tester probes too close to each other as a short circuit may occur. If the operation is not as specified, replace the air inlet control servo motor.

Scheme 192

1. INSPECT AIR OUTLET CONTROL SERVO MOTOR Remove the air outlet control servo motor. Connect the positive (+) lead from the battery to terminal 4 and negative (-) lead to terminal 5, then check that the lever turns to "DEF" position. Connect the positive (+) lead from the battery to terminal 5 and negative (-) lead to terminal 4, then check that the lever turns to "FACE" position. NOTE: While using the battery during inspection, do not bring the positive and negative tester probes too close to each other as a short circuit may occur. If the operation is not as specified, replace the air outlet control servo motor.

Scheme 193

1. INSPECT AIR MIX CONTROL SERVO MOTOR Remove the air mix control servo motor. Connect the positive (+) lead from the battery to terminal 4 and negative (-) lead to terminal 5, then check that the lever turns to "COOL" side smoothly. Connect the positive (+) lead from the battery to terminal 5 and negative (-) lead to terminal 4, then check that the lever turns to "HOT" side smoothly. NOTE: While using the battery during inspection, do not bring the positive and negative tester probes too close to each other as a short circuit may occur. If the operation is not as specified, replace the air mix control servo motor.

Scheme 194

1. INSPECT AIR MIX CONTROL SERVO MOTOR Remove the air mix control servo motor. Connect the positive (+) lead from the battery to terminal 4 and negative (-) lead to terminal 5, then check that the lever turns to "COOL" side smoothly. Connect the positive (+) lead from the battery to terminal 5 and negative (-) lead to terminal 4, then check that the lever turns to "HOT" side smoothly. NOTE: While using the battery during inspection, do not bring the positive and negative tester probes too close to each other as a short circuit may occur. If the operation is not as specified, replace the air mix control servo motor.

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1. DISCHARGE REFRIGERANT FROM REFRIGERATION SYSTEM SST 07110--58060 (07117--58080, 07117--58090, 07117--78050, 07117--88060, 07117--88070, 07117--88080)
2. REMOVE V (COOLER COMPRESSOR TO CRANKSHAFT PULLEY) BELT NO. 1 Loosen the bolt C. Loosen the bolt A. Loosen the bolt B and remove the V (cooler compressor to crankshaft pulley) belt No. 1.
3. DISCONNECT COOLER REFRIGERANT DISCHARGE HOSE NO. 1 Remove the nut and disconnect the cooler refrigerant discharge hose No. 1 from the compressor and magnetic clutch. Remove the O-ring from the cooler refrigerant discharge hose No. 1. NOTE: Seal the opening of the disconnected parts using vinyl tape to prevent moisture and foreign matter from entering.
4. REMOVE ENGINE UNDER COVER NO. 1
5. DISCONNECT COOLER REFRIGERANT SUCTION HOSE NO. 1 Remove the bolt and disconnect the cooler refrigerant suction hose No. 1 from the compressor and magnetic clutch. Remove the O-ring from the cooler refrigerant suction hose No. 1. NOTE: Seal the opening of the disconnected parts using vinyl tape to prevent moisture and foreign matter from entering.
6. REMOVE COMPRESSOR AND MAGNETIC CLUTCH Remove the bolt and bracket. Disconnect the connector and clamp. Remove the 2 bolts, nut and the cooler compressor bracket. Remove the 3 bolts and the compressor and magnetic clutch.

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1. REMOVE MAGNETIC CLUTCH ASSEMBLY Remove the 2 bolts and the bracket. Place the compressor and magnetic clutch in a vise. NOTE: Do not get the bracket and harness caught in the vise. Using SST(s), hold the magnet clutch hub. SST 95047-10040 Remove the bolt, magnet clutch hub and magnet clutch washer. HINT: There is no set number of magnet clutch washers since they are used for adjusting. Using a snap ring expander, remove the snap ring and magnet clutch rotor. NOTE: Do not damage the seal cover of the bearing when removing the snap ring. Remove the screw and disconnect the connector. Using a snap ring expander, remove the snap ring and magnet clutch stator.
2. REMOVE COOLER COMPRESSOR ASSEMBLY

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1. INSPECT MAGNETIC CLUTCH CLEARANCE Set the dial gage to the magnet clutch hub. Connect the positive battery lead to terminal 3 of the magnet clutch connector and the negative lead to the earth wire. Turn on and off the magnet clutch and measure the clearance. Standard clearance: 0.35 to 0.60 mm (0.013 to 0.023 in.) If the measured value is not within the standard range, remove the magnet clutch hub and adjust it with magnet clutch washers. NOTE: Adjustment shall be performed with 3 or less magnet clutch washers. Remove the compressor and magnetic clutch from the vise. Install bracket with the 2 bolts.
2. INSPECT COMPRESSOR OIL When replacing the compressor and magnetic clutch with a new one, after gradually removing the refrigerant gas from the service valve, drain the following amount of oil from the new compressor and magnetic clutch before installation. Standard: (Oil capacity inside new compressor and magnetic clutch: 120 + 15 cc (4.0 + 0.5 fl. oz.)) - (Remaining oil amount in the removed compressor and magnetic clutch) = (Oil amount to be removed when replacing) NOTE: When checking the compressor oil level, observe the precautions on the cooler removal / installation. When a new compressor and magnetic clutch is installed without removing the oil remaining in the pipes (of the vehicle), the oil amount will become excessive, which prevents heat exchange in the refrigerant and causes refrigerant failure. If the remaining oil in the removed compressor and magnetic clutch is too small in volume, check for oil leakage. Be sure to use ND-OIL 8 for compressor oil.

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1. INSTALL MAGNETIC CLUTCH ASSEMBLY Fit the parts as shown in the illustration and install the magnet clutch stator. Using a snap ring expander, install a new snap ring with the chamfered side facing up. NOTE: Do not damage the seal cover of the bearing when removing the snap ring. Install the screw and connect the connector. Using a snap ring expander, install the magnet clutch rotor and a new snap ring with the chamfered side facing up. NOTE: Do not expand the snap ring by more than 30.5 mm when installing it. Do not damage the seal cover of the bearing when removing the snap ring. Install the magnet clutch washer and magnet clutch hub. NOTE: Do not change the combination of the magnet clutch washers used before disassembly. Using SST(s), hold the magnet clutch hub and install the bolt. Torque: 18 N*m (183 kgf*cm, 13 ft.*lbf) NOTE: Make sure that there is no foreign matter or oil on the compressor shaft, bolt, and clutch hub.

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1. TEMPORARILY TIGHTEN COMPRESSOR AND MAGNETIC CLUTCH Temporarily tighten the compressor and magnetic clutch with the 3 bolts.
2. FULLY TIGHTEN COMPRESSOR AND MAGNETIC CLUTCH Fully tighten the compressor and magnetic clutch with the bolt (A) and bolt (B). Torque: 25 N*m (250 kgf*cm, 18 in.*lbf) Install the cooler compressor bracket with the 2 bolts and nut. Torque: Bolt (C) 25 N*m (250 kgf*cm, 18 in.*lbf) Nut (D) 25 N*m (250 kgf*cm, 18 in.*lbf) Bolt (E) 18 N*m (184 kgf*cm, 13 in.*lbf) Tighten the compressor and magnetic clutch with the bolt (F). Torque: 25 N*m (250 kgf*cm, 18 in.*lbf) Connect the connector and clamp on the cooler compressor bracket. Install the bracket with the bolt.
3. INSTALL COOLER REFRIGERANT SUCTION HOSE NO. 1 Remove the attached vinyl tape from the hose. Sufficiently apply compressor oil to the new O-ring and fitting surface of the compressor and magnetic clutch. Compressor oil: ND-OIL 8 or equivalent Install the O-ring to the cooler refrigerant suction hose No. 1. Install the cooler refrigerant suction hose No. 1 to the compressor and magnetic clutch with the bolt. Torque: 9.8 N*m (100 kgf*cm, 87 in.*lbf)
4. INSTALL COOLER REFRIGERANT DISCHARGE HOSE NO. 1 Remove the attached vinyl tape from the hose. Sufficiently apply compressor oil to the new O-ring and fitting surface of the compressor and magnetic clutch. Compressor oil: ND-OIL 8 or equivalent Install the O-ring to the cooler refrigerant discharge hose No. 1. Install the cooler refrigerant discharge hose No. 1 to the compressor and magnetic clutch with the nut. Torque: 9.8 N*m (100 kgf*cm, 87 in.*lbf)
5. INSTALL V (COOLER COMPRESSOR TO CRANKSHAFT PULLEY) BELT NO. 1 Temporarily install the V (cooler compressor to crankshaft pulley) belt No. 1 as illustrated.
6. ADJUST V (COOLER COMPRESSOR TO CRANKSHAFT PULLEY) BELT NO. 1 Apply drive belt tension by turning the bolt B. Drive belt tension: New Belt: 170 +- 10 lbf Used belt: 125 +- 10 lbf HINT: "New belt" refers to a belt which has been used on a running engine at idling for 5 minutes or more. "Used belt" refers to a belt which has used on a running engine at idling for 5 minutes or more. Using a belt tension gauge, check the V belt tension. Check that the drive belt fits properly in the ribbed grooves.
7. FULLY TIGHTEN V (COOLER COMPRESSOR TO CRANKSHAFT PULLEY) BELT NO. 1 Tighten the bolt A. Torque: 18 N*m (183 kgf*cm, 13 ft.*lbf) Tighten the bolt C. Torque: 58 N*m (591 kgf*cm, 43 ft.*lbf)
8. CHARGE REFRIGERANT SST 07110--58060 (07117--58060, 07117--58070, 07117--58080, 07117--58090, 07117--78050, 07117--88060, 07117--88070, 07117--88080) Specified amount: 600 +- 50 g (21.15 +- 1.76 oz.)
9. WARM UP ENGINE
10. INSPECT REFRIGERANT LEAKAGE

Scheme 224

See also:
• REMOVAL
• REMOVAL
• INSTALLATION