Air Conditioning: Diagnosis Lexus IS II

HOW TO PROCEED WITH TROUBLESHOOTING

HINT

1. Use the following procedures to troubleshoot the air conditioning system.
2. *: Use the intelligent tester.

1. VEHICLE BROUGHT TO WORKSHOP
2. INSPECT BATTERY VOLTAGE Inspect the battery voltage. Standard voltage: 11 to 14 V If the voltage is below 11 V, recharge or replace the battery before proceeding.
3. CHECK COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)* Use the intelligent tester to check if the Multiplex Communication System (MPX) is functioning normally. Result RESULT REFERENCE Result Proceed to MPX DTC is not output A MPX DTC is output B B : Go to «MULTIPLEX COMMUNICATION SYSTEM»(ref-235578-S20958542052006062400000) A : Go to next step
4. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* Use the intelligent tester to check if the CAN Communication System is functioning normally. Result RESULT REFERENCE Result Proceed to CAN DTC is not output A CAN DTC is output B B : Go to «CAN COMMUNICATION SYSTEM»(ref-235565-S22980917632006062400000) A : Go to next step
5. CHECK FOR DTC* Check for DTCs and note any codes that are output. Delete the DTCs. Recheck for DTCs. Based on the DTCs output above, try to force output of the A/C system DTC by simulating the operation indicated by the DTC. Result RESULT REFERENCE Result Proceed to DTC is not output A DTC is output B B : Go to step 8 A : Go to next step
6. PROBLEM SYMPTOMS TABLE Refer to the «PROBLEM SYMPTOMS TABLE»(ref-235579-S33636122662006062400000) . Result RESULT REFERENCE Result Proceed to Fault is not listed in problem symptoms table A Fault is listed in problem symptoms table B B : Go to step 8 A : Go to next step
7. OVERALL ANALYSIS AND TROUBLESHOOTING* Actuator Check (See «ACTUATOR CHECK»(ref-235579-S15024074182006062400000) ) DATA LIST / ACTIVE TEST (See «DATA LIST / ACTIVE TEST»(ref-235579-S08056199012006062400000) ) Terminals of ECU (See «TERMINALS OF ECU»(ref-235579-S23956245472006062400000) ) On-vehicle Inspection Inspection
8. ADJUST, REPAIR OR REPLACE

PROBLEM SYMPTOMS TABLE

AIR CONDITIONING SYSTEM

PROBLEM SYMPTOMS TABLE

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1. AIR CONDITIONING AMPLIFIER HINT: Check from the rear of the connector while it is connected to the A/C amplifier. CONNECTOR TERMINALS VOLTAGE SPECIFICATION Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition J58-1 (B) - J58-20 (GND) Y - W-B Power source (Back-up) Always 10 to 14 V J58-2 (MHTR) - J58-20 (GND) BR - W-B MIR/HTR relay signal Engine switch on (IG), REAR DEF switch: OFF 10 to 14 V J58-2 (MHTR) - J58-20 (GND) BR - W-B MIR/HTR relay signal Engine switch on (IG), REAR DEF switch: ON Below 1 V J58-3 (RDEF) - J58-20 (GND) B - W-B DEFOG relay signal Engine switch on (IG), FRONT DEF switch: OFF 10 to 14 V J58-3 (RDEF) - J58-20 (GND) B - W-B DEFOG relay signal Engine switch on (IG), FRONT DEF switch: ON Below 1 V J58-4 (HTR2) - J58-20 (GND) LG - W-B GLW RLY2 relay signal Engine switch on (IG) 10 to 14 V J58-4 (HTR2) - J58-20 (GND) LG - W-B GLW RLY2 relay signal Engine switch on (IG) Engine running at 850 rpm or more, Ambient temperature 0°C (32°F) or less, Engine coolant temperature 69°C (156°F) or less, Temperature switch: MAX HOT, Blower switch: LO Below 1 V J58-5 (SOL+) - J58-20 (GND) G - W-B A/C compressor operation signal A/C switch: ON Pulse generation (See waveform 1) J58-11 (BLW) - J58-20 (GND) O - W-B Blower motor speed control signal Engine switch on (IG), Blower switch: ON Pulse generation (See waveform 2) J58-13 (PRE) - J58-38 (SG-2) V - P Pressure sensor signal Start engine, Operate A/C system, Refrigerant pressure: Abnormal pressure (more than 3,030 kPa (31.0 kgf/cm, 440 psi)) 4.7 V or higher J58-13 (PRE) - J58-38 (SG-2) V - P Pressure sensor signal Start engine, Operate A/C system, Refrigerant pressure: Abnormal pressure (less than 180 kPa (1.9 kgf/cm, 27 psi)) Below 0.7 V J58-13 (PRE) - J58-38 (SG-2) V - P Pressure sensor signal Start engine, Operate A/C system, Refrigerant pressure: Abnormal pressure (more than 3,030 kPa (31.0 kgf/cm, 440 psi) and less than 180 kPa (1.9 kgf/cm, 27 psi)) 0.7 to 4.7 V J58-14 (TSP) - J58-20 (GND) P - W-B Passenger side solar sensor signal Engine switch on (IG), Solar sensor subjected to electric light 0.8 to 4.3 V J58-14 (TSP) - J58-20 (GND) P - W-B Passenger side solar sensor signal Engine switch on (IG), Solar sensor is covered with a cloth Below 0.8 V J58-16 (TR) - J58-19 (SG-1) G - L Room temperature sensor signal Engine switch on (IG), Cabin temperature: 25°C (77°F) 1.6 to 1.8 V J58-16 (TR) - J58-19 (SG-1) G - L Room temperature sensor signal Engine switch on (IG), Cabin temperature: 40°C (104°F) 0.8 to 1.0 V J58-19 (SG-1) - Body ground L - Body ground Ground for room temperature sensor Always Below 1 V J58-20 (GND) - Body ground W-B - Body ground Ground for main power supply Always Below 1 V J58-21 (IG+) - J58-20 (GND) B - W-B Power source (IG) Engine switch on (IG) 10 to 14 V J58-21 (IG+) - J58-20 (GND) B - W-B Power source (IG) Engine switch off Below 1 V J58-23 (HTR1) - J58-20 (GND) L - W-B GLW RLY1 relay signal Engine switch on (IG) 10 to 14 V J58-23 (HTR1) - J58-20 (GND) L - W-B GLW RLY1 relay signal Engine switch on (IG) Engine running at 850 rpm or more, Ambient temperature 0°C (32°F) or less, Engine coolant temperature 69°C (156°F) or less, Temperature switch: MAX HOT, blower switch: LO Below 1 V J58-26 (S5-2) - J58-38 (SG-2) W - P Power supply for pressure sensor Engine switch on (IG), A/C switch: ON 5 V J58-26 (S5-2) - J58-38 (SG-2) W - P Power supply for pressure sensor Engine switch on (IG), A/C switch: OFF Below 1 V J58-30 (MPX+) - J58-31 (MPX-) BR - BR Multiplex communication system Multiplex communication circuit - J58-33 (DGS1) - J58-39 (SG-6) R - Y Exhaust gas sensor signal (Nox) After 30 seconds from engine switch on (IG) and sensor is exposed to exhaust gas 1.0 to 4.5 V J58-34 (DGS) - J58-39 (SG-6) BR - Y Exhaust gas sensor signal (HC, CO) After 30 seconds from engine switch on (IG) and sensor is exposed to exhaust gas 1.0 to 4.5 V J58-35 (TSD) - J58-20 (GND) LG - W-B Driver side solar sensor signal Engine switch on (IG), Solar sensor subjected to electric light 0.8 to 4.3 V J58-35 (TSD) - J58-20 (GND) LG - W-B Driver side solar sensor signal Engine switch on (IG), Solar sensor is covered with a cloth Below 0.8 V J58-38 (SG-2) - Body ground P - Body ground Ground for pressure sensor Always Below 1 V J58-39 (SG-6) - Body ground Y - Body ground Ground for exhaust gas sensor Always Below 1 V e1- 2 (BUS G) - Body ground - Ground for BUS IC Always Below 1 V e1- 3 (BUS) - e1-2 (BUS G) - BUS IC control signal Engine switch off $$ on (IG) Pulse generation e1-4 (B BUS) - e1-2 (BUS G) - Power supply for BUS IC Engine switch on (IG) 10 to 14 V e1-4 (B BUS) - e1-2 (BUS G) - Power supply for BUS IC Engine switch off Below 1 V e1-6 (TE) - e1-5 (SG) - Evaporator temperature sensor signal Engine switch on (IG), Evaporator temperature 0°C (32°F) 2.0 to 2.4 V e1-6 (TE) - e1-5 (SG) - Evaporator temperature sensor signal Engine switch on (IG), Evaporator temperature 15°C (59°F) 1.4 to 1.8 V Waveform 1: ITEM CONTENTS Item Contents Terminal No. (Symbols) J58-5 (SOL+) - J58-20 (GND) Tool Setting 5 V/DIV., 500 $$s/DIV. Vehicle Condition Engine switch on (IG) A/C switch: ON Waveform 2: ITEM CONTENTS Item Contents Terminal No. (Symbols) J58-5 (SOL+) - J58-20 (GND) Tool Setting 1 V/DIV., 500 $$s/DIV. Vehicle Condition Engine switch on (IG) Blower switch: ON
2. MULTI-DISPLAY (w/ NAVIGATION SYSTEM) CONNECTOR TERMINALS VOLTAGE SPECIFICATION Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition J54-3 (GND) - Body ground W-B - Body ground Ground for heater control panel Always Below 1 V J54-10 (IG) - J54-3 (GND) B - W-B Power source (IG) Engine switch on (IG) 10 to 14 V J54-10 (IG) - J54-3 (GND) B - W-B Power source (IG) Engine switch off Below 1 V J54-12 (ACC) - J54-3 (GND) O - W-B Power source (ACC) Engine switch on (ACC) 10 to 14 V J54-12 (ACC) - J54-3 (GND) O - W-B Power source (ACC) Engine switch off Below 1 V J54-14 (+B1) - J54-3 (GND) LG - W-B Power source (Back-up) Always 10 to 14 V
3. INTEGRATION CONTROL & PANEL ASSEMBLY (w/o NAVIGATION SYSTEM) CONNECTOR TERMINALS VOLTAGE SPECIFICATION Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition J53-4 (IG+) - J53-8 (E) B - W-B Power source (IG) Engine switch on (IG) 10 to 14 V J53-4 (IG+) - J53-8 (E) B - W-B Power source (IG) Engine switch off Below 1 V J53-5 (ACC) - J53-8 (E) O - W-B Power source (ACC) Engine switch on (ACC) 10 to 14 V J53-5 (ACC) - J53-8 (E) O - W-B Power source (ACC) Engine switch off Below 1 V J53-8 (E) - Body ground W-B - Body ground Ground for heater control panel Always Below 1 V J53-14 (B) - J53-8 (E) LG - W-B Power source (Back-up) Always 10 to 14 V
4. ECM CONNECTOR TERMINALS VOLTAGE SPECIFICATION Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition E3-10 (LCKI) - E4-7 (E1) B (1) , GR (2) - BR Compressor lock sensor signal Engine idling, Blower switch: LO, A/C switch: ON Pulse generation (See waveform 3) E4-7 (E1) - Body ground BR - Body ground Ground for ECM Always Below 1 V E5-30 (E3) (1) - Body ground BR - Body ground Ground for ambient temperature sensor Always Below 1 V A6-11 (ACMG) (2) - E4-7 (E1) L - BR Compressor operation signal Engine idling, Blower switch: LO, A/C switch: OFF 10 to 14 V A6-11 (ACMG) (2) - E4-7 (E1) L - BR Compressor operation signal Engine idling, Blower switch: LO, A/C switch: ON Below 1 V A6-11 (ACMG) (2) - E4-7 (E1) L - BR Compressor operation signal Engine idling, Blower switch: LO, A/C switch: ON Below 1 V A6-13 (ACMG) (1) - E4-7 (E1) L - BR Compressor operation signal Engine idling, Blower switch: LO, A/C switch: OFF 10 to 14 V A6-13 (ACMG) (1) - E4-7 (E1) L - BR Compressor operation signal Engine idling, Blower switch: LO, A/C switch: ON Below 1 V A5-18 (TAM) (1) - E5-30 (E3) (1) V-R - BR Ambient temperature sensor signal Engine switch on (IG) at 25°C (77°F) 1.8 to 2.2 V A5-18 (TAM) () - E5-30 (E3) (1) V-R - BR Ambient temperature sensor signal Engine switch on (IG) at 40°C (104°F) 1.2 to 1.6 V A5-26 (TAM) (2) - A5-27 (ETAM) (2) V-R - BR Ambient temperature sensor signal Engine switch on (IG) at 25°C (77°F) 1.8 to 2.2 V A5-26 (TAM) (2) - A5-27 (ETAM) (2) V-R - BR Ambient temperature sensor signal Engine switch on (IG) at 40°C (104°F) 1.2 to 1.6 V (1) 4GR-FSE (2) 2GR-FSE Waveform 3: ITEM CONTENTS Item Contents Terminal No. (Symbols) E3-10 (LCKI) - E4-7 (E1) Tool Setting 200 mV/DIV., 10 ms/DIV. Vehicle Condition Engine switch on (IG) Blower switch: LO A/C switch: ON

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1. CHECK DLC3 The vehicle's ECM uses the ISO 15765-4 for communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 1576-4 format. HINT: Connect the cable of the intelligent tester to the DLC3, turn the engine switch on (IG) and attempt to use the tester. If the display indicates that a communication error has occurred, there is a problem either with the vehicle or with the tester. If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle. If communication is still not possible when the tester is connected to another vehicle, the problem may be in the tester itself. Consult the Service Department listed in the tester's instruction manual. CONNECTOR TERMINALS SPECIFICATION Symbol (Terminal No.) Terminal Description Condition Specified Condition SIL (7) - SG (5) Bus "+" line During transmission Pulse generation CG (4) - Body ground Chassis ground Always Below 1 ohms SG (5) - Body ground Signal ground Always Below 1 ohms BAT (16) - Body ground Battery positive Always 11 to 14 V CANH (6) - CANL (14) HIGH-level CAN bus line Engine switch off 54 to 69 ohms CANH (6) - Battery positive HIGH-level CAN bus line Engine switch off 1 Mohms or higher CANH (6) - CG (4) HIGH-level CAN bus line Engine switch off 3 Mohms or higher CANL (14) - Battery positive LOW-level CAN bus line Engine switch off 1 Mohms or higher CANL (14) - CG (4) LOW-level CAN bus line Engine switch off 3 Mohms or higher

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1. DTC CHECK (SENSOR CHECK) Start the engine and warm it up. Perform the indicator check (See «CHECK MODE PROCEDURE»(ref-235579-S31096043682006062400000) ). HINT: After the indicator check is completed, the system enters the DTC check mode automatically. Push the "R/F (Recirculation/Fresh)" switch to perform the actuator check. NOTE: In the sensor check mode, which is automatically transferred from the indicator check mode, troubleshooting may be partially performed. Be sure to perform the actuator check, and then the sensor check again. If the check is performed in a dark place, DTC 21 may be displayed. HINT: When there are no problems, DTC 00 is output. If the steps are difficult to read because they change automatically, push the "UpDr" switch to display the steps one at a time so that they can be read easily. The items are displayed step by step each time the "UpDr" switch is pushed. Read the code displayed on the panel. (Trouble codes are output on the temperature display.) HINT: Refer to the DTC chart (Diagnostic Trouble Code chart) for details of the codes (See «DIAGNOSTIC TROUBLE CODE CHART»(ref-235579-S12550842952006062400000) ). As an example, the illumination shows that display code 21 is output. Push the "OFF" switch to finish panel diagnosis. Push the "R/F" switch to enter the actuator check mode.
2. CLEARING DTC During the sensor check, press the "FRONT DEF" switch and "REAR DEF" switch at the same time.
3. DTC CHECK USING INTELLIGENT TESTER

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1. Connect the intelligent tester to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the tester ON.
4. Enter the following menu items: DIAGNOSIS / OBD/ MOBD / DTC INFO / CURRENT CODES. HINT: Refer to the intelligent tester operator's manual for further details.
5. Check the details of the DTCs.
6. Clear the DTCs. HINT: After repairing the malfunctions, clear the DTC. Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Enter the following menu items: DIAGNOSIS / OBD/MOBD / DTC INFO / CLEAR CODES. HINT: Refer to the intelligent tester operator's manual for further details. Press the YES button.

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1. LIST OF OPERATION METHODS By operating each of the A/C control switches as shown in the diagram below, it is possible to enter the diagnostic check mode.
2. INDICATOR CHECK Turn the engine switch off. Turn the engine switch on (IG) while pressing the A/C control "AUTO" switch and "R/F" switch simultaneously. The indicator check is automatically performed when panel diagnosis is activated. Check that the indicators light up and go off at 1 second intervals 4 times in succession. HINT: The sensor check automatically starts when the indicator check is completed. Press the "OFF" switch to cancel the check mode. If a navigation system is installed, the indicator will blink and the buzzer will sound.
3. DTC CHECK (SENSOR CHECK) Start the engine and warm it up. Perform the indicator check. HINT: After the indicator check is completed, the system enters the DTC check mode automatically. Push the "R/F" switch to perform the actuator check. NOTE: In the sensor check mode, which is automatically transferred from the indicator check mode, troubleshooting may be partially performed. Be sure to perform the actuator check, and then the sensor check again. If the check is performed in a dark place, DTC 21 may be displayed. HINT: When there are no problems, DTC 00 is output. If the steps are difficult to read because they change automatically, push the "UPDr" switch to display the steps one at a time so that they can be read easily. The items are displayed step by step each time the "UPDr" switch is pushed. Read the code displayed on the panel. HINT: Refer to the DTC chart (Diagnostic Trouble Code chart) for details of the codes (See «DIAGNOSTIC TROUBLE CODE CHART»(ref-235579-S12550842952006062400000) ). Push the "OFF" switch to finish panel diagnosis. Push the "R/F" switch to enter the actuator check mode.
4. ACTUATOR CHECK Start the engine and warm it up. Perform the indicator check. Push the "R/F" switch to perform the actuator check. HINT: Be sure to perform the actuator check after starting the engine. As the actuator check is repeated from steps 1 to 10 at 1 second intervals, check the temperature and air flow visually and by hand. HINT: The display blinks at 1 second intervals in the step operation. As an example, the illustration shows that display code 21 is output. Push the "OFF" switch to finish panel diagnosis. Push the "AUTO" switch to enter the sensor check mode. DISPLAY CODE REFERENCE Step No. Display Code Conditions Blower Level Air Mix Damper Airflow Vent Air Inlet Damper Cool Air Bypass Damper Compressor 1 0 0 0 % open FACE FRESH -14 % OFF 2 1 1 0 % open FACE FRESH -14 % OFF 3 2 17 0 % open FACE RECIRCULATION / FRESH -14 % ON 4 3 17 0 % open FACE RECIRCULATION 113.50 % ON 5 4 17 50 % open B/L RECIRCULATION 113.50 % ON 6 5 17 50 % open B/L RECIRCULATION 113.50 % ON 7 6 17 50 % open FOOT FRESH 113.50 % ON 8 7 17 100 % open FOOT-0 FRESH 113.50 % ON 9 8 17 100 % open F/D FRESH 113.50 % ON 10 9 31 100 % open DEF FRESH 113.50 % ON If the steps are difficult to read because they change automatically, push the "UPDr" switch to display the steps one at a time so that they can be read easily. The items are displayed step by step each time the "UPDr" switch is pushed. HINT: Push the "OFF" switch to finish the panel diagnosis. Push the "R/F" switch to enter the sensor check mode.

DATA LIST / ACTIVE TEST

1. DATA LIST HINT: Using the intelligent tester's DATA LIST allows switch, sensor, actuator, and other item values to be read without removing any parts. Reading the DATA LIST early in troubleshooting is one way to save time. Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the tester on. Enter the following menus: DIAGNOSIS / OBD/ MOBD / AIR CONDITIONER / DATA LIST. Check the value(s) by referring to the table below. AIR CONDITIONER AIR CONDITIONER Item Measurement Item / Display (Range) Normal Condition Diagnostic Note ROOM TEMP (Room temperature sensor) Room temperature sensor / Min.: -6.5°C (20.3°F), Max.: 57.25°C (135.05°F) Actual cabin temperature is displayed - AMBI TEMP SENS (Ambient temperature sensor) Ambient temperature sensor / Min.: -23.3°C (-9.94°F), Max.: 65.95°C (150.71°F) Actual ambient temperature is displayed - EVAP TEMP (Evaporator temperature sensor) Evaporator temperature sensor / Min.: -29.7°C (-21.46°F), Max.: 59.55°C (139.19°F) Actual evaporator temperature is displayed - SOLAR SENS-D (Solar Sensor (D side)) Driver side solar sensor / Min.: 0, Max.: 255 Driver side temperature increases as brightness increases - SOLAR SENS-P (Solar Sensor (P side)) Passenger side solar sensor / Min.: 0, Max.: 255 Passenger side temperature increases as brightness increases - COOLANT TEMP (Engine coolant temperature) Engine coolant temperature / Min.: 1.3°C (34.34°F), Max.: 90.55°C (194.99°F) Actual engine coolant temperature is displayed while engine is warmed up - SET TEMP-D (Set temperature (D - side)) Driver side set temperature / Min.: 0, Max.: 255 Driver side set temperature is displayed - SET TEMP-P (Set temperature (P - side)) Passenger side set temperature / Min.: 0, Max.: 255 Passenger side set temperature is displayed - ESTIMATE TEMP-D (Estimated temperature (D side)) Driver side estimated temperature / Min.: -358.4°C (-613.12°F), Max.: 358.4°C (677.12°F) Driver side estimated temperature is displayed - ESTIMATE TEMP-P (Estimated temperature (P side)) Passenger side estimated temperature / Min.: -358.4°C (-613.12°F), Max.: 358.4°C (677.12°F) Passenger side estimated temperature is displayed - HAND FREE TEL (Hand free telephone) Hands free telephone / OFF or ON - - BLOWER LEVEL (Blower motor speed level) Blower motor speed level / Min.: 0 level, Max.: 31 level Increases in the range between 0 and 31 as the blower motor speed increases - AMBI TEMP (Adjusted ambient temperature) Adjusted ambient temperature / Min.: -30.8°C (-23.44°F), Max.: 50.8°C (123.44°F) - - EMISS GAS SENS (Emission gas sensor) Emission gas / Min.: 0 V, Max.: 255 V Smog ventilation sensor value increases as gas amount increases - SET TEMP SHIFT (Shift set temperature) Shift set temperature / +2 C, +1 C, NORMAL, -1 C, -2 C Customized value will be displayed - AIR INLET MODE (Air Inlet mode) Air inlet mode / AUTO, MANUAL Customized value will be displayed - COMPRESSOR MODE (Compressor mode) Compressor mode / AUTO, MANUAL Customized value will be displayed - COMPRS/ DEF OPER (Compressor/ DEF operation mode) Compressor / DEF mode / LINK, NORMAL Customized value will be displayed - EVAP CTRL (Evaporator Control) Evaporator control / AUTO, MANUAL Customized value will be displayed - GAS SENS SHIFT (Emission Gas Sensor Shift) Emission gas sensor shift / MU MORE, MORE, LI MORE, NORMAL, LI LESS, LESS, MU LESS Customized value will be displayed - BUTTON PRS BUZ (Button press buzzer) Button press buzzer / ON, OFF Customized value will be displayed - FOOT AIR LEAK (Foot air leak) Foot air leak / ON, OFF Customized value will be displayed - AUTO BLOW UP (Foot / DEF automatic blower up function) Foot / DEF auto blower up function / ON, OFF Customized value will be displayed - FOOT / DEF MODE (Foot /DEF auto mode) Foot / DEF auto mode / ON, OFF Customized value will be displayed - AMBIENT TMP SFT (Ambient temperature Shift) Ambient temperature shift / +3 C, +2 C, +1 C, NORMAL, -1 C, -2 C, -3 C Customized value will be displayed - DESTINATION (Destination) Destination / DOMEST, USA, EUROPE, AUSTRAL, MIDEAST, NO INFO Value changes with destinations - NOX GAS SENS (Emission gas Nox sensor) Emission gas / Min.: 0, Max.: 255 Smog ventilation sensor value increases as gas amount increases - REG PRESS SENS (Regulator pressure sensor) Regulator pressure sensor / Min.: 0, Max.: 255 Actual regulator pressure is displayed - REG CTRL CURRNT (Regulator control current) Regulator control current / Min.: 0 A, Max.: 255 A - - AIR MIX PULSE-D (Air mix servomotor target pulse (D side)) Driver side air mix servo motor target pulse / Min.: 0, Max.: 255 MAX. COLD: 5 (pulse) MAX. HOT: 104 (pulse) - AIR MIX PULSE-P (Air mix servomotor target pulse (P side)) Passenger side air mix servo motor target pulse / Min.: 0, Max.: 255 MAX. COLD: 105 (pulse) MAX. HOT: 6 (pulse) - AIR OUT 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: 45 to 70 (pulse) FOOT/DEF: 84 (pulse) DEF: 97 (pulse) - A/I DAMP PLS (Air inlet damper target pulse) Air inlet damper target pulse / Min.: 0, Max.: 255 RECIRCULATION: 31 (pulse) FRESH: 7 (pulse) - A/B DAMP PLS (Cool air bypass pulse) Driver side cool air bypass pulse / Min.: 0, Max.: 255 CLOSE: 50 (pulse) OPEN: 8 (pulse) - #CODES (Number of trouble codes) Number of trouble codes / Min.: 0, Max.: 255 Number of DTCs will be displayed - ECM ITEM NORMAL CONDITION REFERENCE Item Measurement Item / (Range) Display Normal Condition Diagnostic Note A/C SIG (A/C Signal) A/C signal / ON or OFF ON: A/C ON OFF: A/C OFF - A/C MAG CLUTCH (A/C magnetic clutch relay) A/C magnetic clutch relay / OFF, ON ON: A/C magnetic clutch ON OFF: A/C magnetic clutch OFF
2. ACTIVE TEST HINT: Performing the intelligent tester's ACTIVE TEST allows relays, VSVs, actuators and other items to be operated without removing any parts. Performing the ACTIVE TEST early in troubleshooting is one way to save time. The DATA LIST can be displayed in the ACTIVE TEST. Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Turn the tester on. Enter the following menus: DIAGNOSIS / OBD/ MOBD / AIR CONDITIONER / ACTIVE TEST. Perform the ACTIVE TEST by referring to the table below. AIR CONDITIONER AIR CONDITIONER Item Test Details / Display (Range) Diagnostic Note BLOWER MOTOR (Blower motor) Blower motor / Min.: Level 0, Max.: Level 31 - A/C MAG CLUTCH (Magnetic clutch relay) Magnetic clutch relay / OFF, ON - DEFOGER RLY-R (Defogger Relay (Rear)) Defogger relay (Rear) / OFF, ON - HEATER1 (Electric Heater 1) Electric Heater 1 / OFF, ON - HEATER2 (Electric Heater 2) Electric Heater 2 / OFF, ON - AIR MIX PULSE-D (Air mix servomotor pulse (D side)) Driver side air mix servo motor pulse / Min.: 0, Max.: 255 - AIR MIX PULSE-P (Air mix servomotor pulse (P side)) Passenger side air mix servo motor pulse / Min.: 0, Max.: 255 - AIR OUT PULSE-D (Air outlet servomotor pulse (D side) Driver side air outlet servo motor pulse / Min.: 0, Max.: 255 - A/I DAMP PLS (Air inlet damper target pulse) Air inlet damper target pulse / Min.: 0, Max.: 255 - A/B DAMP PLS (Cool air bypass pulse) Cool air bypass pulse / Min.: 0, Max.: 255 - ECM ITEM AIR CONDITIONER REFERENCE Item Test Details / Display (Range) Diagnostic Note A/C MAG CLUTCH Magnetic clutch relay / OFF, ON

DIAGNOSTIC TROUBLE CODE CHART

AIR CONDITIONING SYSTEM

DIAGNOSTIC TROUBLE CODE CHART

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1. ACTUATOR CHECK Start the engine and warm it up. Perform the indicator check (See «CHECK MODE PROCEDURE»(ref-235579-S31096043682006062400000) ). Push the "R/F" switch to perform the actuator check. HINT: Be sure to perform the actuator check after starting the engine. As the actuator check is repeated from steps 1 to 10 at 1 second intervals, check the temperature and air flow visually and by hand. HINT: The display blinks at 1 second intervals in the step operation. As an example, the illustration shows that display code 21 is output. Push the "OFF" switch to finish panel diagnosis. Push the "AUTO" switch to enter the sensor check mode. DISPLAY CODE CONDITION REFERENCE Step No. Display Code Conditions Blower Level Air Mix Damper Airflow Vent Air Inlet Damper Cool Air Bypass Damper Compressor 1 0 0 0% open FACE FRESH -14% OFF 2 1 1 0% open FACE FRESH -14% OFF 3 2 17 0% open FACE RECIRCULATION / FRESH -14% ON 4 3 17 0% open FACE RECIRCULATION 113.50% ON 5 4 17 50% open B/L RECIRCULATION 113.50% ON 6 5 17 50% open B/L RECIRCULATION 113.50% ON 7 6 17 50% open FOOT FRESH 113.50% ON 8 7 17 100% open FOOT-0 FRESH 113.50% ON 9 8 17 100% open F/D FRESH 113.50% ON 10 9 31 100% open DEF FRESH 113.50% ON If the steps are difficult to read because they change automatically, push the "UPDr" switch to display the steps one at a time so that they can be read easily. The items are displayed step by step each time the "UPDr" switch is pushed. HINT: Push the "OFF" switch to finish panel diagnosis. Push the "R/F" switch to enter the sensor check mode.