Air Conditioning System (Diagnostic Codes & Circuit Tests): Other Lexus IS II facelift 2

PROCEDURE

1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Select the item below in the Data List, and read the display on the Techstream. DATA LIST / AIR CONDITIONER: Tester Display Measurement Item/Range Normal Condition Diagnostic Note Room Temperature Sensor (Room Temp) Room temperature sensor / min.: -6.5°C (20.3°F), max.: 57.25°C (135.05°F) Actual cabin temperature is displayed - OK The display is as specified in the normal condition column. Result Result Proceed to NG A OK (When troubleshooting according to the PROBLEM SYMPTOM TABLE) B OK (When troubleshooting according to the DTC) C B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C --> REPLACE AIR CONDITIONING AMPLIFIER A: Go to next step
2. INSPECT AIR CONDITIONING AMPLIFIER Remove the A/C amplifier with the connectors still connected. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Condition Specified Condition J58-16 (TR) - J58-19 (SG-1) Engine switch on (IG) at 25°C (77°F) 1.8 to 2.2 V J58-16 (TR) - J58-19 (SG-1) Engine switch on (IG) at 40°C (104°F) 1.2 to 1.6 V HINT: As the temperature increases, the voltage decreases. Result Result Proceed to NG A OK (When troubleshooting according to the PROBLEM SYMPTOM TABLE) B OK (When troubleshooting according to the DTC) C B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C --> REPLACE AIR CONDITIONING AMPLIFIER A: Go to next step
3. INSPECT A/C ROOM TEMPERATURE SENSOR Remove the A/C room temperature sensor. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition J38-1 - J38-2 10°C (50°F) 3.00 to 3.73 kohms J38-1 - J38-2 15°C (59°F) 2.45 to 2.88 kohms J38-1 - J38-2 20°C (68°F) 1.95 to 2.30 kohms J38-1 - J38-2 25°C (77°F) 1.60 to 1.80 kohms J38-1 - J38-2 30°C (86°F) 1.28 to 1.47 kohms J38-1 - J38-2 35°C (95°F) 1.00 to 1.22 kohms J38-1 - J38-2 40°C (104°F) 0.80 to 1.00 kohms J38-1 - J38-2 45°C (113°F) 0.65 to 0.85 kohms J38-1 - J38-2 50°C (122°F) 0.50 to 0.70 kohms J38-1 - J38-2 55°C (131°F) 0.44 to 0.60 kohms J38-1 - J38-2 60°C (140°F) 0.36 to 0.50 kohms NOTE: Hold the sensor only by its connector. Touching the sensor may change the resistance value. When measuring, the sensor temperature must be the same as the ambient temperature. HINT: As the temperature increases, the resistance decreases (see the graph). NG --> REPLACE A/C ROOM TEMPERATURE SENSOR OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (A/C ROOM TEMPERATURE SENSOR - AIR CONDITIONING AMPLIFIER) Disconnect the connectors from the A/C room temperature sensor and A/C amplifier. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition J58-16 (TR) - J38-1 Always Below 1 ohms J58-19 (SG-1) - J38-2 Always Below 1 ohms J58-16 (TR) - Body ground Always 10 kohms or higher J58-19 (SG-1) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE AIR CONDITIONING AMPLIFIER

1. CHECK MULTIPLEX COMMUNICATION SYSTEM Use the Techstream to check if the Multiplex Communication System (MPX) is functioning normally. Result Result Proceed to MPX DTC is not output A MPX DTC is output B B --> GO TO MULTIPLEX COMMUNICATION SYSTEM A: Go to next step
2. CHECK CAN COMMUNICATION SYSTEM Use the Techstream to check if the CAN Communication System is functioning normally. Result Result Proceed to CAN DTC is not output A CAN DTC is output B B --> GO TO CAN COMMUNICATION SYSTEM A: Go to next step
3. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Select the item below in the Data List, and read the display on the Techstream. DATA LIST / AIR CONDITIONER: Tester Display Measurement Item/Range Normal Condition Diagnostic Note Ambient Temp Sensor (Ambi 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 circuit: -23.3°C (-9.94°F) Short in circuit: 65.95°C (150.71°F) OK The display is as specified in the normal condition column. Result Result Proceed to NG A OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) B OK (When troubleshooting according to the DTC) C B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C --> REPLACE AIR CONDITIONING AMPLIFIER A: Go to next step
4. INSPECT AMBIENT TEMPERATURE SENSOR Remove the ambient temperature sensor. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition B5-1 - B5-2 10°C (50°F) 3.00 to 3.73 kohms B5-1 - B5-2 15°C (59°F) 2.45 to 2.88 kohms B5-1 - B5-2 20°C (68°F) 1.95 to 2.30 kohms B5-1 - B5-2 25°C (77°F) 1.60 to 1.80 kohms B5-1 - B5-2 30°C (86°F) 1.28 to 1.47 kohms B5-1 - B5-2 35°C (95°F) 1.00 to 1.22 kohms B5-1 - B5-2 40°C (104°F) 0.80 to 1.00 kohms B5-1 - B5-2 45°C (113°F) 0.65 to 0.85 kohms B5-1 - B5-2 50°C (122°F) 0.50 to 0.70 kohms B5-1 - B5-2 55°C (131°F) 0.44 to 0.60 kohms B5-1 - B5-2 60°C (140°F) 0.36 to 0.50 kohms NOTE: Even slightly touching the sensor may change the resistance value. Be sure to hold the connector of the sensor. When measuring, the sensor temperature must be the same as the ambient temperature. HINT: As the temperature increases, the resistance decreases (see the graph). NG --> REPLACE AMBIENT TEMPERATURE SENSOR OK: Go to next step
5. CHECK WIRE HARNESS (AMBIENT TEMPERATURE SENSOR - ECM) Disconnect the ambient temperature sensor connector. Disconnect the ECM connectors. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition B5-1 - A5-18 (TAM) (*1) Always Below 1 ohms B5-2 - E5-30 (E3) (*1) Always Below 1 ohms B5-1 - A5-26 (TAM) (*2) Always Below 1 ohms B5-2 - A5-27 (ETAM) (*2) Always Below 1 ohms A5-18 (TAM) - Body ground (*1) Always 10 kohms or higher E5-30 (E3) - Body ground (*1) Always 10 kohms or higher A5-26 (TAM) - Body ground (*2) Always 10 kohms or higher A5-27 (ETAM) - Body ground (*2) Always 10 kohms or higher *1: for 4GR-FSE *2: for 2GR-FSE NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE ECM

1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Select the item below in the Data List, and read the display on the Techstream. DATA LIST / AIR CONDITIONER: Tester Display Measurement Item/Range Normal Condition Diagnostic Note Evaporator Temp Sensor (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 circuit: -29.7°C (-21.46°F) Short in circuit: 59.55°C (139.19°F) OK The display is as specified in the normal condition column. Result Result Proceed to NG A OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) B OK (When troubleshooting according to the DTC) C B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C --> REPLACE AIR CONDITIONING AMPLIFIER A: Go to next step
2. INSPECT AIR CONDITIONING HARNESS Remove the air conditioning harness (evaporator temperature sensor). Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition e1-5 - e1-6 -10°C (14°F) 7.30 to 9.10 kohms e1-5 - e1-6 -5°C (23°F) 5.65 to 6.95 kohms e1-5 - e1-6 0°C (32°F) 4.40 to 5.35 kohms e1-5 - e1-6 5°C (41°F) 3.40 to 4.15 kohms e1-5 - e1-6 10°C (50°F) 2.70 to 3.25 kohms e1-5 - e1-6 15°C (59°F) 2.14 to 2.58 kohms e1-5 - e1-6 20°C (68°F) 1.71 to 2.05 kohms e1-5 - e1-6 25°C (77°F) 1.38 to 1.64 kohms e1-5 - e1-6 30°C (86°F) 1.11 to 1.32 kohms NOTE: Even slightly touching the sensor may change the resistance value. Be sure to hold the connector of the sensor. When measuring, the sensor temperature must be the same as the ambient temperature. HINT: As the temperature increases, the resistance decreases (see the graph). NG --> REPLACE AIR CONDITIONING HARNESS OK --> REPLACE AIR CONDITIONING AMPLIFIER

1. INSPECT FUSE (LH-IG) Remove the LH-IG fuse from the cowl side junction block LH. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Item Condition Specified Condition LH-IG fuse Always Below 1 ohms NG --> REPLACE FUSE (LH-IG) OK: Go to next step
2. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Allow exhaust gas (HC, CO) to travel to the sensing portion of the smog ventilation sensor. Select the item below in the Data List, and read the display on the Techstream. DATA LIST / AIR CONDITIONER: Tester Display Measurement Item/Range Normal Condition Diagnostic Note Emission Gas Sensor (Emiss Gas Sens) Emission gas / Min.: 0 V, Max.: 255 V Smog ventilation sensor value increases as gas amount increases - OK The display is as specified in the normal condition column. Result Result Proceed to NG A OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) B OK (When troubleshooting according to the DTC) C B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C --> REPLACE AIR CONDITIONING AMPLIFIER A: Go to next step
3. CHECK WIRE HARNESS (SMOG VENTILATION SENSOR - BODY GROUND) Disconnect the smog ventilation sensor connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition B11-6 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK WIRE HARNESS (SMOG VENTILATION SENSOR - BATTERY) Disconnect the smog ventilation sensor connector. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Condition Specified Condition B11-3 (IG) - Body ground Engine switch on (IG) 10 to 14 V Engine switch off Below 1 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. INSPECT SMOG VENTILATION SENSOR Remove the smog ventilation sensor. Apply battery voltage between terminals 3 (IG) and 6 (E). Allow exhaust gas (HC, CO) to travel to the sensing portion of the smog ventilation sensor, and measure the resistance between terminals 1 (SG) and 2 (DGS). OK When the sensor is exposed to the exhaust gas, the resistance increases. HINT: The resistance before blowing exhaust gas is 10 kohms to 40 kohms. NG --> REPLACE SMOG VENTILATION SENSOR OK: Go to next step
6. CHECK WIRE HARNESS (SMOG VENTILATION SENSOR - A/C AMPLIFIER) Disconnect the smog ventilation sensor. Disconnect the A/C amplifier connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Condition Specified Condition B11-1 (SG) - J58-39 (SG-6) Always Below 1 ohms B11-2 (DGS) - J58-34 (DGS) Always Below 1 ohms J58-39 (SG-6) - Body ground Always 10 kohms or higher J58-34 (DGS) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE AIR CONDITIONING AMPLIFIER

Scheme 41

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

Scheme 42

1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Expose the sensing portion of the solar sensor to light. HINT: Use an incandescence light for inspection. Select the item below in the Data List, and read the display on the Techstream. DATA LIST / AIR CONDITIONER: Tester Display Measure Item/Range Normal Condition Diagnostic Note Solar Sensor (P side) (Solar Sens-P) Passenger side solar sensor / Min.: 0, Max.: 255 Passenger side solar sensor value increases as brightness increases - OK The display is as specified in the normal condition column. Result Result Proceed to NG A OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) B OK (When troubleshooting according to the DTC) C B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C --> REPLACE AIR CONDITIONING AMPLIFIER A: Go to next step
2. CHECK WIRE HARNESS (SOLAR SENSOR) Disconnect the solar sensor connector. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Condition Specified Condition K1-6 (CLTB) - K1-3 (CLTE) Engine switch off Below 1 V K1-6 (CLTB) - K1-3 (CLTE) Engine switch on (IG) 10 to 14 V OK --> See step 4 NG: Go to next step
3. CHECK WIRE HARNESS (MAIN BODY ECU RH - SOLAR SENSOR) Disconnect the main body ECU RH connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition J74-6 (CLTB) - K1-6 (CLTB) Always Below 1 ohms J74-4 (CLTE) - K1-3 (CLTE) Always Below 1 ohms J74-6 (CLTB) - Body ground Always 10 kohms or higher J74-4 (CLTE) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE MAIN BODY ECU RH
4. CHECK SOLAR SENSOR Remove the solar sensor with its connector still connected. Apply battery voltage between terminals 6 (CLTB) and 3 (CLTE) of the solar sensor. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Condition Specified Condition K1-2 (TSR) - K1-3 (CLTE) Sensor is subjected to electric light 0.8 to 4.3 V K1-2 (TSR) - K1-3 (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 negative (-) lead to terminal 2 and positive (+) lead to terminal 1 of the solar sensor. 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. HINT: Use an incandescent light for inspection. Bring it within about 30 cm (11.8 in.) of the solar sensor. As the inspection light is moved away from the sensor, the voltage decreases. NG --> REPLACE SOLAR SENSOR OK: Go to next step
5. CHECK WIRE HARNESS (SOLAR SENSOR - A/C AMPLIFIER) Disconnect the solar sensor connector. Disconnect the A/C amplifier connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition J58-14 (TSP) - K1-2 (TSR) Always Below 1 ohms J58-14 (TSP) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE AIR CONDITIONING AMPLIFIER

1. CHECK MULTIPLEX COMMUNICATION SYSTEM Use the Techstream to check if the Multiplex Communication System (MPX) is functioning normally. Result Result Proceed to MPX DTC is not output A MPX DTC is output B B --> GO TO MULTIPLEX COMMUNICATION SYSTEM A: Go to next step
2. CHECK CAN COMMUNICATION SYSTEM Use the Techstream to check if the CAN Communication System is functioning normally. Result Result Proceed to CAN DTC is not output A CAN DTC is output B B --> GO TO CAN COMMUNICATION SYSTEM A: Go to next step
3. INSPECT ECM Remove the ECM with its connectors still connected. Measure the waveform of the connector. Standard Tester Connection Condition Specified Condition E3-10 (LCKI) - Body ground Engine switch on (IG) AUTO switch ON A/C switch ON Magnetic clutch ON Pulse generation Item Contents Tool setting 200 mV/DIV., 10 ms/DIV. Vehicle condition Engine switch on (IG) AUTO switch ON A/C switch ON Magnetic clutch ON Result Result Proceed to NG A OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) B OK (When troubleshooting according to the DTC) C B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C --> REPLACE ECM A: Go to next step
4. INSPECT A/C COMPRESSOR (LOCK SENSOR) Disconnect the A/C compressor connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified Condition E8-2 (SSR+) - E8-5 (SSR-) 160 to 320 ohms NG --> REPLACE A/C COMPRESSOR (LOCK SENSOR) OK: Go to next step
5. CHECK WIRE HARNESS (ECM - A/C COMPRESSOR) Disconnect the A/C compressor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition E3-10 (LCKI) - E8-2 (SSR+) Always Below 1 ohms E3-10 (LCKI) - Body ground Always 10 kohms or higher E8-5 (SSR-) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE ECM

1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Expose the sensing portion of the solar sensor to light. HINT: Use an incandescence light for inspection. Select the item below in the Data List, and read the display on the Techstream. DATA LIST / AIR CONDITIONER: Tester Display Measurement Item/Range Normal Condition Diagnostic Note Solar Sensor (D side) (Solar Sens-D) Driver side solar sensor / Min.: 0, Max.: 255 Driver side solar sensor value increases as brightness increases - OK The display is as specified in the normal condition column. Result Result Proceed to NG A OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) B OK (When troubleshooting according to the DTC) C B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C --> REPLACE AIR CONDITIONING AMPLIFIER A: Go to next step
2. CHECK WIRE HARNESS (SOLAR SENSOR) Disconnect the solar sensor connector. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Condition Specified Condition K1-6 (CLTB) - K1-3 (CLTE) Engine switch on (IG) 10 to 14 V K1-6 (CLTB) - K1-3 (CLTE) Engine switch off Below 1 V OK --> See step 4 NG: Go to next step
3. CHECK WIRE HARNESS (SOLAR SENSOR - MAIN BODY ECU RH) Disconnect the main body ECU RH connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition J74-6 (CLTB) - K1-6 (CLTB) Always Below 1 ohms J74-4 (CLTE) - K1-3 (CLTE) Always Below 1 ohms J74-6 (CLTB) - Body ground Always 10 kohms or higher J74-4 (CLTE) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE MAIN BODY ECU RH
4. CHECK SOLAR SENSOR Remove the solar sensor with its connector still connected. Apply battery voltage between terminals 6 (CLTB) and 3 (CLTE) of the solar sensor. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Condition Specified Condition K1-1 (TSL) - K1-3 (CLTE) Sensor is subjected to electric light 0.8 to 4.3 V K1-1 (TSL) - K1-3 (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 negative (-) lead to terminal 2 and positive (+) lead to terminal 1 of the solar sensor. 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. HINT: Use an incandescent light for inspection. Bring it about 30 cm (11.8 in.) from the solar sensor. As the inspection light is moved away from the sensor, the voltage decreases. NG --> REPLACE SOLAR SENSOR OK: Go to next step
5. CHECK WIRE HARNESS (SOLAR SENSOR - A/C AMPLIFIER) Disconnect the solar sensor connector. Disconnect the A/C amplifier connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition J58-35 (TSD) - K1-1 (TSL) Always Below 1 ohms J58-35 (TSD) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE AIR CONDITIONING AMPLIFIER

1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Operate the front passenger side temperature adjustment switch. Select the item below in the Data List, and read the display on the Techstream. DATA LIST / AIR CONDITIONER: Tester Display Measurement Item/Range Normal Condition Diagnostic Note Air Mix Servo Targ Pulse(P) (Air Mix Pulse-P) Passenger side air mix servo motor target pulse / Min.: 0, Max.: 255 MAX. COLD: 105 (pulse) MAX. HOT: 6 (pulse) - OK The display is as specified in the normal condition column. Result Result Proceed to NG A OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) B OK (When troubleshooting according to the DTC) C B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C --> See step 2 A --> REPLACE A/C AMPLIFIER
2. REPLACE AIR MIX CONTROL SERVO MOTOR Replace the air mix control servo motor. HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a normal one and check that the condition returns to normal. Check for DTCs. Result Result Proceed to DTC B1441/41 is output A DTC B1441/41 is not output B B --> END A: Go to next step
3. REPLACE AIR CONDITIONING HARNESS Replace the air conditioning harness. HINT: Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness with a normal one and check that the condition returns to normal. Check for DTCs. Result Result Proceed to DTC B1441/41 is output A DTC B1441/41 is not output B B --> END A --> REPLACE A/C AMPLIFIER

1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Operate the R/F (Recirculation/Fresh) switch. Select the item below in the Data List, and read the display on the Techstream. DATA LIST / AIR CONDITIONER: Tester Display Measurement Item/Range Normal Condition Diagnostic Note Air Inlet Damper Targ Pulse (A/I Damp Targ Pls) Air inlet damper target pulse / Min.: 0, Max.: 255 RECIRCULATION: 31 (pulse) FRESH: 7 (pulse) - OK The display is as specified in the normal condition column. Result Result Proceed to NG A OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) B OK (When troubleshooting according to the DTC) C B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C --> See step 2 A --> REPLACE A/C AMPLIFIER
2. REPLACE AIR INLET CONTROL SERVO MOTOR Replace the air inlet control servo motor. HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a normal one and check that the condition returns to normal. Check for DTCs. Result Result Proceed to DTC B1442/42 is output A DTC B1442/42 is not output B B --> END A: Go to next step
3. REPLACE AIR CONDITIONING HARNESS Replace the air conditioning harness. HINT: Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness with a normal one and check that the condition returns to normal. Check for DTCs. Result Result Proceed to DTC B1442/42 is output A DTC B1442/42 is not output B B --> END A --> REPLACE A/C AMPLIFIER

1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Operate the MODE switch. Select the item below in the Data List, and read the display on the Techstream. DATA LIST / AIR CONDITIONER: Tester Display Measurement Item/Range Normal Condition Diagnostic Note Air Outlet Servo Pulse (D) (Air Out Pulse-D) Driver side air outlet servo motor target pulse / Min.: 0, Max.: 255 FACE: 9 to 17 (pulse) B/L: 32 to 38 (pulse) FOOT: 56 to 70 (pulse) FOOT/DEF: 84 (pulse) DEF: 97 (pulse) - OK The display is as specified in the normal condition column. Result Result Proceed to NG A OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) B OK (When troubleshooting according to the DTC) C B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C --> See step 2 A --> REPLACE A/C AMPLIFIER
2. REPLACE AIR OUTLET CONTROL SERVO MOTOR Replace the air outlet control servo motor. HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a normal one and check that the condition returns to normal. Check for DTCs. Result Result Proceed to DTC B1443/43 is output A DTC B1443/43 is not output B B --> END A: Go to next step
3. REPLACE AIR CONDITIONING HARNESS Replace the air conditioning harness. HINT: Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness with a normal one and check that the condition returns to normal. Check for DTCs. Result Result Proceed to DTC B1443/43 is output A DTC B1443/43 is not output B B --> END A --> REPLACE A/C AMPLIFIER

1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Expose the sensing portion of the solar sensor to light. Select the item below in the Data List, and read the display on the Techstream. DATA LIST / AIR CONDITIONER: Tester Display Measurement Item/Range Normal Condition Diagnostic Note Cool Air Bypass Pulse (A/B Damp Pls) Passenger side cool air by-pass pulse / Min.: 0, Max.: 255 CLOSE: 50 (pulse) OPEN: 8 (pulse) - OK The display is as specified in the normal condition column. Result Result Proceed to NG A OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) B OK (When troubleshooting according to the DTC) C B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C --> See step 2 A --> REPAIR A/C AMPLIFIER
2. REPLACE COOL AIR BY-PASS CONTROL SERVO MOTOR Replace the cool air by-pass control servo motor. HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a normal one and check that the condition returns to normal. Check for DTCs. Result Result Proceed to DTC B1445/45 is output A DTC B1445/45 is not output B B --> END A: Go to next step
3. REPAIR AIR CONDITIONING HARNESS Replace the air conditioning harness. HINT: Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness with a normal one and check that the condition returns to normal. Check for DTCs. Result Result Proceed to DTC B1445/45 is output A DTC B1445/45 is not output B B --> END A --> REPLACE A/C AMPLIFIER

1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Operate the driver side temperature adjustment switch. Select the item below in the Data List, and read the display on the Techstream. DATA LIST / AIR CONDITIONER: Tester Display Measurement Item/Range Normal Condition Diagnostic Note Air Mix Servo Targ Pulse(D) (Air Mix Pulse-D) Driver side air mix servo motor target pulse / Min.: 0, Max.: 255 MAX COLD: 5 (pulse) MAX HOT: 104 (pulse) - OK The display is as specified in the normal condition column. Result Result Proceed to NG A OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) B OK (When troubleshooting according to the DTC) C B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C --> See step 2 A --> REPLACE A/C AMPLIFIER
2. REPLACE AIR MIX CONTROL SERVO MOTOR Replace the air mix control servo motor. HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a normal one and check that the condition returns to normal. Check for DTCs. Result Result Proceed to DTC B1446/46 is output A DTC B1446/46 is not output B B --> END A: Go to next step
3. REPLACE AIR CONDITIONING HARNESS Replace the air conditioning harness. HINT: Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness with a normal one and check that the condition returns to normal. Check for DTCs. Result Result Proceed to DTC B1446/46 is output A DTC B1446/46 is not output B B --> END A --> REPLACE A/C AMPLIFIER

1. INSPECT A/C COMPRESSOR Disconnect the A/C compressor connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition E8-3 (SOL+) - E8-6 (SOL-) 20°C (68°F) 10 to 11 ohms NG --> REPLACE A/C COMPRESSOR OK: Go to next step
2. CHECK WIRE HARNESS (A/C COMPRESSOR - BODY GROUND) Disconnect the A/C compressor connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition E8-6 (SOL-) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK WIRE HARNESS (A/C COMPRESSOR - A/C AMPLIFIER) Disconnect the A/C compressor connector. Disconnect the A/C amplifier connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition J58-5 (SOL+) - E8-3 (SOL+) Always Below 1 ohms J58-5 (SOL+) - Body ground Always 10 kohms or higher Result Result Proceed to NG A OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) B OK (When troubleshooting according to the DTC) C B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C --> REPLACE AIR CONDITIONING AMPLIFIER A --> REPAIR OR REPLACE HARNESS OR CONNECTOR

1. INSPECT FUSE (LH-IG) Remove the LH-IG fuse from the cowl side junction block LH. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Item Condition Specified Condition LH-IG fuse Always Below 1 ohms NG --> REPLACE FUSE (LH-IG) OK: Go to next step
2. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Allow exhaust gas (NOx) to travel to the sensing portion of the smog ventilation sensor. Select the item below in the Data List, and read the display on the Techstream. DATA LIST / AIR CONDITIONER: Tester Display Measurement Item/Range Normal Condition Diagnostic Note Emission Gas Nox Sensor (Nox Gas Sens) Emission gas NOx sensor / Min.: 0, Max.: 255 Smog ventilation sensor value increases as gas amount increases - OK The display is as specified in the normal condition column. Result Result Proceed to NG A OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) B OK (When troubleshooting according to the DTC) C B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C --> REPLACE AIR CONDITIONING AMPLIFIER A: Go to next step
3. CHECK WIRE HARNESS (SMOG VENTILATION SENSOR - BODY GROUND) Disconnect the smog ventilation sensor connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition B11-6 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK WIRE HARNESS (SMOG VENTILATION SENSOR - BATTERY) Disconnect the smog ventilation sensor connector. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Condition Specified Condition B11-3 (IG) - Body ground Engine switch on (IG) 10 to 14 V Engine switch off Below 1 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. INSPECT SMOG VENTILATION SENSOR Remove the smog ventilation sensor. Apply battery voltage between terminals 3 (IG) and 6 (E). Allow exhaust gas (NOx) to travel to the sensing portion of the smog ventilation sensor, and measure the resistance between terminals 1 (SG) and 4 (DGS1). OK When the sensor is exposed to the exhaust gas, the resistance increases. HINT: The resistance before blowing exhaust gas is 10 kohms to 40 kohms. NG --> REPLACE SMOG VENTILATION SENSOR OK: Go to next step
6. CHECK WIRE HARNESS (SMOG VENTILATION SENSOR - A/C AMPLIFIER) Disconnect the exhaust gas sensor connector. Disconnect the A/C amplifier connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition B11-1 (SG) - J58-39 (SG-6) Always Below 1 ohms B11-4 (DGS1) - J58-33 (DGS1) Always Below 1 ohms J58-39 (SG-6) - Body ground Always 10 kohms or higher J58-33 (DGS1) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE AIR CONDITIONING AMPLIFIER

1. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Air Conditioner / Active Test. Check the operation by referring to the table below. ACTIVE TEST / AIR CONDITIONER Tester Display Test Part Control Range Diagnostic Note Air Mix Servo Targ Pulse (D) (Air Mix Pulse-D) Driver side air mix control servo motor pulse Min.: 0, Max.: 255 - Air Mix Servo Targ Pulse (P) (Air Mix Pulse-P) Front passenger side air mix control servo motor pulse Min.: 0, Max.: 255 - Air Outlet Servo Pulse (D) (Air Out Pulse-D) Air outlet control servo motor pulse Min.: 0, Max.: 255 - Air Inlet Damper Targ Pulse (A/I Damp Targ Pls) Air inlet damper target pulse Min.: 0, Max.: 255 - Cool Air Bypass Pulse (A/B Damp Pls) Cool air by-pass control servo motor pulse Min.: 0, Max.: 255 - OK Arm of the damper servo motor selected in the Active Test moves smoothly According to the test, proceed to the next step. Result Result Proceed to One of the front air conditioner control servo motors is malfunctioning A All of the front air conditioner control servo motors are malfunctioning B B --> See step 8 A: Go to next step
2. SYSTEM CHECK According to the test, proceed to the next step. Result Result Proceed to Only the air mix control servo motor (for front passenger side) is malfunctioning A Only the air inlet control servo motor is malfunctioning B Only the air outlet control servo motor is malfunctioning C Only the cool air by-pass control servo motor is malfunctioning D Only the air mix control servo motor (for driver side) is malfunctioning E B --> See step 4 C --> See step 5 D --> See step 6 E --> See step 7 A: Go to next step
3. REPLACE AIR MIX CONTROL SERVO MOTOR (FOR FRONT PASSENGER SIDE) Replace the air mix control servo motor (for front passenger side). HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1497/97 is not output A DTC B1497/97 is output B B --> See step 8 A --> END
4. REPLACE AIR INLET CONTROL SERVO MOTOR Replace the air inlet control servo motor. HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1497/97 is not output A DTC B1497/97 is output B B --> See step 8 A --> END
5. REPLACE AIR OUTLET CONTROL SERVO MOTOR Replace the air outlet control servo motor. HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1497/97 is not output A DTC B1497/97 is output B B --> See step 8 A --> END
6. REPLACE COOL AIR BY-PASS CONTROL SERVO MOTOR Replace the cool air by-pass control servo motor. HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1497/97 is not output A DTC B1497/97 is output B B --> See step 8 A --> END
7. REPLACE AIR MIX CONTROL SERVO MOTOR (FOR DRIVER SIDE) Replace the air mix control servo motor (for driver side). HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1497/97 is not output A DTC B1497/97 is output B B --> See step 8 A --> END
8. REPLACE AIR CONDITIONING HARNESS Replace the air conditioning harness. HINT: Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1497/97 is not output A DTC B1497/97 is output B B --> See step 9 A --> END
9. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER POWER SOURCE) Disconnect the A/C amplifier connector. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Condition Specified Condition J58-1 (B) - Body ground Always 11 to 14 V B --> REPAIR OR REPLACE HARNESS OR CONNECTOR A --> REPAIR A/C AMPLIFIER

1. GO TO MULTIPLEX COMMUNICATION SYSTEM HINT: Refer to multiplex communication system. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [08/2012 - ]»(ref-606519-S01282570262014032500000) . NEXT --> END

Scheme 43

The blower motor is operated by signals from the A/C amplifier. The blower motor speed is controlled using various duty ratios.

Duty Ratio

1. The duty ratio is the ratio of the blower motor ON time (A) to the total of the blower motor ON and OFF time (A + B).
2. The blower motor controller controls the blower motor speed.

Scheme 44

Scheme 45

1. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Select the item below in the Active Test and then check that the relay operates. ACTIVE TEST / AIR CONDITIONER: Tester Display Test Part Control Range Diagnostic Note Blower Motor (Blower Motor) Blower motor Min.: 0, Max.: 31 - Result Result Proceed to OK A NG (blower motor does not operate) B NG (blower motor operates but does not change speed) C B --> See step 2 C --> See step 6 A --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. INSPECT FUSE Remove the HEATER fuse from the engine room R/B and J/B No. 1. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Item Condition Specified Condition HEATER fuse Always Below 1 ohms NG --> REPLACE FUSE (HEATER) OK: Go to next step
3. CHECK WIRE HARNESS (BLOWER MOTOR - BODY GROUND) Disconnect the blower motor connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition A34-1 (GND) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK WIRE HARNESS (BLOWER MOTOR - BATTERY) Disconnect the blower motor connector. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Condition Specified Condition A34-3 (+B) - Body ground Always 10 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. INSPECT BLOWER MOTOR Disconnect the A/C amplifier connector. Connect the blower motor connector. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Condition Specified Condition A34-2 (SI) - Body ground Engine switch on (IG) 4.5 to 5.5 V NG --> REPLACE BLOWER MOTOR OK: Go to next step
6. CHECK WIRE HARNESS (A/C AMPLIFIER - BODY GROUND) Disconnect the A/C amplifier connector. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Condition Specified Condition J58-11 (BLW) - Body ground Engine switch on (IG) 4.5 to 5.5 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
7. INSPECT AIR CONDITIONING AMPLIFIER Remove the A/C amplifier with its connectors still connected. Turn the engine switch on (IG). Turn the blower switch ON (Lo). Measure the waveform between terminal J58-11 (BLW) of the A/C amplifier and body ground. OK Waveform is as shown in the illustration. HINT: Waveform varies with the blower level. Item Contents Tool setting 1 V/DIV., 500 μs/DIV. Vehicle condition Engine switch on (IG) Blower switch ON (Lo) NG --> REPLACE AIR CONDITIONING AMPLIFIER OK --> REPLACE BLOWER MOTOR

1. CHECK MULTIPLEX COMMUNICATION SYSTEM Use the Techstream to check if the Multiplex Communication System (MPX) is functioning normally. Result Result Proceed to MPX DTC is not output A MPX DTC is output B B --> GO TO MULTIPLEX COMMUNICATION SYSTEM A: Go to next step
2. CHECK CAN COMMUNICATION SYSTEM Use the Techstream to check if the CAN Communication System is functioning normally. Result Result Proceed to CAN DTC is not output A CAN DTC is output B B --> GO TO CAN COMMUNICATION SYSTEM A: Go to next step
3. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Turn the A/C switch on and off. Select the item below in the Data List, and read the display on the Techstream. DATA LIST / ENGINE AND ECT: Tester Display Measurement Item/Range Normal Condition Diagnostic Note A/C Signal (A/C Signal) A/C signal / ON or OFF ON: A/C ON OFF: A/C OFF - OK The display is as specified in the normal condition column. NG --> See step 12 OK: Go to next step
4. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Change the blower fan speed to LO using the blower switch. Turn the A/C switch on and off. Select the item below in the Data List, and read the display on the Techstream. DATA LIST / ENGINE AND ECT: Tester Display Measurement Item/Range Normal Condition Diagnostic Note A/C Magnetic Clutch Relay (A/C Mag Clutch) A/C magnetic clutch relay / OFF, ON ON: A/C magnetic clutch ON OFF: A/C magnetic clutch OFF - OK The display is as specified in the normal condition. NG --> REPLACE ECM OK: Go to next step
5. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Select the item below in the Active Test and read the display on the Techstream. ACTIVE TEST / ENGINE AND ECT: Tester Display Test Part Control Range Diagnostic Note Control the A/C Magnet Clutch (A/C Magnet Clutch) Magnetic Clutch Relay OFF, ON - OK The magnetic clutch operates normally. OK --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE NG: Go to next step
6. INSPECT FUSE (A/C COMP) Remove the A/C COMP fuse from the engine room R/B and J/B No. 2. Measure the resistance of the fuse. Standard resistance Tester Item Condition Specified Condition A/C COMP fuse Always Below 1 ohms NG --> REPLACE FUSE (A/C COMP) OK: Go to next step
7. INSPECT RELAY (A/C COMP) Remove the A/C COMP relay from the engine room R/B and J/B No. 2. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified Condition 3 - 5 10 kohms or higher 3 - 5 Below 1 ohms (when battery voltage is applied to terminals 1 and 2) NG --> REPLACE RELAY (A/C COMP) OK: Go to next step
8. INSPECT A/C COMPRESSOR Disconnect the A/C compressor connector. Disconnect the magnetic clutch connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition E8-1 (MG+) - A-1 Always Below 1 ohms E8-1 (MG+) - Body ground Always 10 kohms or higher NG --> REPLACE A/C COMPRESSOR OK: Go to next step
9. INSPECT MAGNETIC CLUTCH Measure the resistance of the connector. Standard resistance Tester Connection Condition Specified Condition A-1 - Body ground Always 3.4 to 3.8 ohms When connector terminal A1 is connected to the positive (+) battery terminal, check that the following occurs: 1) the magnetic clutch's operating sound can be heard, and 2) the magnetic clutch's hub and rotor lock. NG --> REPLACE MAGNETIC CLUTCH OK: Go to next step
10. CHECK WIRE HARNESS (ENGINE ROOM R/B AND J/B NO. 2 - A/C COMPRESSOR) Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Specified Condition Relay block A/C COMP relay terminal 5 - Body ground 10 to 14 V Relay block A/C COMP relay terminal 1 - Body ground 10 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
11. CHECK WIRE HARNESS (ENGINE ROOM R/B AND J/B NO. 2 - ECM) Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance 4GR-FSE Tester Connection Specified Condition Relay block A/C COMP relay terminal 2 - A6-13 (ACMG) Below 1 ohms A6-13 (ACMG) - Body ground 10 kohms or higher 2GR-FSE Tester Connection Specified Condition Relay block A/C COMP relay terminal 2 - A6-11 (ACMG) Below 1 ohms A6-11 (ACMG) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (A/C COMPRESSOR - ENGINE ROOM R/B AND J/B NO. 2)
12. REPLACE AIR CONDITIONING AMPLIFIER Replace the A/C amplifier with a normal one and check that the condition returns to normal. OK Same problem does not occur. OK --> END NG --> REPLACE ECM

1. INSPECT FUSE (ECU-IG LH) Remove the ECU-IG LH fuse from the cowl side junction block LH. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Item Condition Specified Condition ECU-IG LH fuse Always Below 1 ohms NG --> REPLACE FUSE (ECU-IG LH) OK: Go to next step
2. INSPECT AIR CONDITIONING AMPLIFIER (IG+ - GND) Remove the A/C amplifier with its connectors still connected. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Condition Specified Condition J58-21 (IG+) - J58-20 (GND) Engine switch on (IG) 10 to 14 V NG --> See step 3 OK --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
3. CHECK WIRE HARNESS (AIR CONDITIONING AMPLIFIER - BATTERY) Disconnect the A/C amplifier connector. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Condition Specified Condition J58-21 (IG+) - Body ground Engine switch off Below 1 V Engine switch on (IG) 10 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK WIRE HARNESS (AIR CONDITIONING AMPLIFIER - BODY GROUND) Disconnect the A/C amplifier connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition J58-20 (GND) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE AIR CONDITIONING AMPLIFIER

1. INSPECT FUSE (A/C) Remove the A/C fuse from the cowl side junction block LH. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Item Condition Specified Condition A/C fuse Always Below 1 ohms NG --> REPLACE FUSE (A/C) OK: Go to next step
2. INSPECT AIR CONDITIONING AMPLIFIER (AIR CONDITIONING AMPLIFIER - BODY GROUND) Disconnect the A/C amplifier connector. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Condition Specified Condition J58-1 (B) - Body ground Always 10 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE