Air Conditioning System (Diagnostics - Introduction): Diagnosis Lexus ES XV60

HOW TO PROCEED WITH TROUBLESHOOTING [06/2012 - ]

HINT

1. Use the following procedure to troubleshoot the air conditioning system.
2. *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
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 to the next step. NEXT: Go to next step
3. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* Use the Techstream to check if the CAN communication system is functioning normally. Result Result Proceed to CAN DTCs are not output A CAN DTCs are output B B --> GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [06/2012 - ]»(ref-598635-S10414945732014021400000) A: Go to next step
4. CHECK FOR DTC* Check for DTCs and note any code that is output. Clear the DTCs. Recheck for DTCs. Based on the DTCs output above, try to force the A/C system to output DTCs by simulating the conditions indicated by the DTC. Result Result Proceed to DTCs are output A DTCs are not output B B --> Go to step 6 A: Go to next step
5. DIAGNOSTIC TROUBLE CODE CHART Find the output DTCs in Diagnostic Trouble Code Chart. Refer to «DIAGNOSTIC TROUBLE CODE CHART [06/2012 - ]»(ref-598464-S34792749392014021400000) . NEXT --> Go to step 8
6. PROBLEM SYMPTOMS TABLE Refer to Problem Symptoms Table. Refer to «PROBLEM SYMPTOMS TABLE [06/2012 - ]»(ref-598464-S25253580382014021400000) . Result 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* Panel diagnosis (indicator check, sensor check). Refer to «DIAGNOSIS SYSTEM [06/2012 - ]»(ref-598464-S25917268532014021400000) Data List / Active Test. Refer to «DATA LIST / ACTIVE TEST [06/2012 - ]»(ref-598464-S13229566822014021400000) Terminals of ECU. Refer to «TERMINALS OF ECU [06/2012 - ]»(ref-598464-S38043264112014021400000) On-vehicle Inspection Inspection NEXT: Go to next step
8. ADJUST, REPAIR OR REPLACE NEXT --> END

PROBLEM SYMPTOMS TABLE [06/2012 - ]

HINT

1. Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
2. Inspect the fuses and relays related to this system before inspecting the suspected areas below.

AIR CONDITIONING SYSTEM

1. *1: w/ Audio and Visual System (w/o Multi-display)
2. *2: w/ Audio and Visual System (w/ Multi-display with Parking Assist Monitor System)
3. *3: w/ Audio and Visual System (w/ Multi-display without Parking Assist Monitor System)
4. *4: w/ Navigation System
5. *5: w/ Quick Heater Assembly

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1. AIR CONDITIONING AMPLIFIER ASSEMBLY HINT: Check from the rear of the connector while it is connected to the air conditioning amplifier assembly. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition H54-1 (IG+) - H54-14 (GND) V - W-B Power source (IG) Engine switch on (IG) 11 to 14 V H54-1 (IG+) - H54-14 (GND) V - W-B Power source (IG) Engine switch off Below 1 V H54-2 (SOL+) - H54-14 (GND) W - W-B Compressor solenoid operation signal Engine running A/C switch: on Blower switch: LO Pulse generation (See waveform 1) H54-3 (PTC2) - H54-14 (GND)*1 L - W-B Quick heater operation signal Engine running ECO mode switch (integration control and panel assembly) on Blower motor off Temperature settings: except MAX HOT Engine coolant temperature 70°C or lower Ambient temperature 10°C or lower 11 to 14 V H54-3 (PTC2) - H54-14 (GND)*1 L - W-B Quick heater operation signal Engine running ECO mode switch (integration control and panel assembly) off Blower motor on Temperature settings: MAX HOT Engine coolant temperature 70°C or lower Ambient temperature 10°C or lower Below 1 V H54-4 (ECOS) - H54-14 (GND) SB - W-B ECO mode switch (integration control and panel assembly) signal Engine switch on (IG) ECO mode switch (integration control and panel assembly) not turned 11 to 14 V H54-4 (ECOS) - H54-14 (GND) SB - W-B ECO mode switch (integration control and panel assembly) signal Engine switch on (IG) ECO mode switch (integration control and panel assembly) being turned and held at ECO position Below 1 V H54-5 (TAM) - H54-13 (SG-2) P - GR Ambient temperature sensor signal Engine switch on (IG) Ambient temperature: 25°C (77°F) 1.35 to 1.75 V H54-5 (TAM) - H54-13 (SG-2) P - GR Ambient temperature sensor signal Engine switch on (IG) Ambient temperature: 40°C (104°F) 0.9 to 1.2 V H54-7 (FLOQ) - H54-13 (SG-2) G - GR A/C flow sensor signal Engine switch on (IG) A/C switch: off 3.8 to 4.2 V H54-7 (FLOQ) - H54-13 (SG-2) G - GR A/C flow sensor signal Engine switch on (IG) A/C switch: on Blower switch: HI 0.7 to 3.8 V H54-8 (LOCK) - H54-14 (GND) P - W-B A/C lock sensor signal Engine running Blower switch: LO A/C switch: on Pulse generation (See waveform 2) H54-9 (PRE) - H54-13 (SG-2) V - GR Air conditioning pressure sensor signal Engine running A/C system operating Refrigerant pressure: Abnormal pressure (more than 3025 kPa (30.8 kgf/cm 2 , 439 psi)) 4.80 V or higher H54-9 (PRE) - H54-13 (SG-2) V - GR Air conditioning pressure sensor signal Engine running A/C system operating Refrigerant pressure: Abnormal pressure (less than 176 kPa (1.8 kgf/cm 2 , 26 psi)) Below 0.50 V H54-9 (PRE) - H54-13 (SG-2) V - GR Air conditioning pressure sensor signal Engine running A/C system operating Refrigerant pressure: Normal pressure (less than 3025 kPa (30.8 kgf/cm 2 , 439 psi) and more than 176 kPa (1.8 kgf/cm 2 , 26 psi)) 0.50 to 4.80 V H54-10 (S5-3) - H54-13 (SG-2) BR - GR Power supply for air conditioning pressure sensor Engine switch on (IG) 4.75 to 5.25 V H54-10 (S5-3) - H54-13 (SG-2) BR - GR Power supply for air conditioning pressure sensor Engine switch off Below 1 V H54-11 (CANH) - H54-12 (CANL) G - W CAN communication system CAN communication occurring Pulse generation H54-13 (SG-2) - Body ground GR - Body ground Ground for air conditioning pressure sensor, ambient temperature sensor, A/C lock sensor, A/C flow sensor, smog ventilation sensor Always Below 1 V H54-14 (GND) - Body ground W-B - Body ground Ground for main power supply Always Below 1 V H54-20 (MGC) - H54-14 (GND) B - W-B Magnetic clutch operation signal Engine running Blower switch: LO A/C switch: off 11 to 14 V H54-20 (MGC) - H54-14 (GND) B - W-B Magnetic clutch operation signal Engine running Blower switch: LO A/C switch: on Below 1 V H54-21 (B) - H54-14 (GND) GR - W-B Power source (Back-up) Always 11 to 14 V H54-22 (BLW) - H54-14 (GND) R - W-B Blower motor speed control signal Engine switch on (IG) Blower switch: LO Pulse generation (See waveform 3) H54-29 (TR) - H54-34 (SG-1) P - LG Room temperature sensor signal Engine switch on (IG) Cabin temperature: 25°C (77°F) 1.8 to 2.2 V H54-29 (TR) - H54-34 (SG-1) P - LG Room temperature sensor signal Engine switch on (IG) Cabin temperature: 40°C (104°F) 1.2 to 1.6 V H54-30 (S5-1) - H54-13 (SG-2) L - GR Power supply for A/C flow sensor Engine switch off Below 1 V H54-30 (S5-1) - H54-13 (SG-2) L - GR Power supply for A/C flow sensor Engine switch on (IG) 4.5 to 5.5 V H54-32 (TSP) - H54-14 (GND) Y - W-B Solar sensor signal (for front passenger side) Engine switch on (IG) Solar sensor subjected to electric light 0.8 to 4.3 V H54-32 (TSP) - H54-14 (GND) Y - W-B Solar sensor signal (for front passenger side) Engine switch on (IG) Solar sensor covered with a cloth Below 0.8 V H54-33 (TSD) - H54-14 (GND) BE - W-B Solar sensor signal (for driver side) Engine switch on (IG) Solar sensor subjected to electric light 0.8 to 4.3 V H54-33 (TSD) - H54-14 (GND) BE - W-B Solar sensor signal (for driver side) Engine switch on (IG) Solar sensor covered with a cloth Below 0.8 V H54-34 (SG-1) - Body ground LG - Body ground Ground for room temperature sensor Always Below 1 V H54-37 (LIN1) - H54-14 (GND) B - W-B LIN communication signal Engine switch on (IG) Pulse generation H54-40 (PTC1) - H54-14 (GND)*1 G - W-B Quick heater operation signal Engine running ECO mode switch (integration control and panel assembly) on Blower motor off Temperature settings: except MAX HOT Engine coolant temperature 70°C or lower Ambient temperature 10°C or lower 11 to 14 V H54-40 (PTC1) - H54-14 (GND)*1 G - W-B Quick heater operation signal Engine running ECO mode switch (integration control and panel assembly) off Blower motor on Temperature settings: MAX HOT Engine coolant temperature 70°C or lower Ambient temperature 10°C or lower Below 1 V H55-3 (DGS) - H54-13 (SG-2) LG - GR Smog ventilation sensor signal (HC, CO) After 30 seconds from engine switch on (IG) and sensor exposed to exhaust gas (HC, CO) 1.0 to 4.5 V H55-4 (DGS1) - H54-13 (SG-2) SB - GR Smog ventilation sensor signal (NOx) After 30 seconds from engine switch on (IG) and sensor exposed to exhaust gas (NOx) 1.0 to 4.5 V z1-2 (BUS G) - Body ground - Ground for BUS IC Always Below 1 V z1-3 (BUS) - z1-2 (BUS G) - BUS IC control signal Engine switch on (IG) Pulse generation z1-4 (B BUS) - z1-2 (BUS G) - Power supply for BUS IC Always 11 to 14 V z1-5 (SGA) - Body ground - Ground for evaporator temperature sensor Always Below 1 V z1-6 (TEA) - z1-5 (SGA) - Evaporator temperature sensor signal Engine switch on (IG) Evaporator temperature: 0°C (32°F) 1.7 to 2.1 V z1-6 (TEA) - z1-5 (SGA) - Evaporator temperature sensor signal Engine switch on (IG) Evaporator temperature: 15°C (59°F) 0.9 to 1.3 V *1: w/ Quick Heater Assembly Waveform 1: Item Content Terminal No. H54-2 (SOL+) - H54-14 (GND) Tool Setting 5 V/DIV., 500 μs./DIV. Vehicle Condition Engine running A/C switch: on Blower switch: LO Waveform 2: Item Content Terminal No. H54-8 (LOCK) - H54-13 (SG-2) Tool Setting 200 mV/DIV., 10 ms./DIV. Vehicle Condition Engine running Blower switch: LO A/C switch: on Waveform 3: Item Content Terminal No. H54-22 (BLW) - H54-14 (GND) Tool Setting 1 V/DIV., 500 μs./DIV. Vehicle Condition Engine switch on (IG) Blower switch: LO
2. MULTI-MEDIA MODULE RECEIVER ASSEMBLY (w/ Navigation System)
3. MULTI-MEDIA MODULE RECEIVER ASSEMBLY (w/ Audio and Visual System (w/ Multi-display with Parking Assist Monitor System))
4. RADIO RECEIVER ASSEMBLY (w/ Audio and Visual System (w/ Multi-display without Parking Assist Monitor System))
5. RADIO RECEIVER ASSEMBLY (w/ Audio and Visual System (w/o Multi-display)) HINT: Check from the rear of the connector while it is connected to the radio receiver assembly. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition H82-1 (B) - Body ground R - Body ground Power source (Back-up) Always 11 to 14 V H42-5 (TX+) R AVC-LAN communication signal - - H42-9 (GND) - Body ground W-B - Body ground Ground for radio receiver (A/C control panel) Always Below 1 V H42-13 (TX-) G AVC-LAN communication signal - - H42-16 (ACC) - H42-9 (GND) Y - W-B Power source (ACC) Engine switch off Below 1 V H42-16 (ACC) - H42-9 (GND) Y - W-B Power source (ACC) Engine switch on (ACC) 11 to 14 V
6. MULTI-DISPLAY ASSEMBLY (w/ Navigation System)
7. MULTI-DISPLAY ASSEMBLY (w/ Audio and Visual System (w/ Multi-display with Parking Assist Monitor System))
8. MULTI-DISPLAY ASSEMBLY (w/ Audio and Visual System (w/ Multi-display without Parking Assist Monitor System))
9. ACCESSORY METER ASSEMBLY (w/ Audio and Visual System (w/o Multi-display))

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1. DESCRIPTION Air conditioning system data and the Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform troubleshooting.
2. CHECK DLC3 Check the DLC3. Refer to «GENERAL INFORMATION [06/2012 - ]»(ref-598449-S41583545682014021400000) .
3. LIST OF OPERATION METHODS By operating each of the air conditioning control switches as shown in the diagram below, it is possible to enter diagnostic check mode.
4. INDICATOR CHECK Turn the engine switch off. Turn the engine switch on (ACC) and wait at least 5 seconds. Turn the engine switch on (IG) while pressing the air conditioning panel "AUTO" switch and "Recirculation/Fresh" switch simultaneously. Hold both switches until the indicator check screen appears. TEXT IN ILLUSTRATION *1 Multi-media Module Receiver Assembly (w/ Navigation System) *2 Multi-media Module Receiver Assembly (w/ Audio and Visual System (w/ Multi-display with Parking Assist Monitor System)) *3 Radio Receiver Assembly (w/ Audio and Visual System (w/o Multi-display)) *4 Radio Receiver Assembly (w/ Audio and Visual System (w/ Multi-display without Parking Assist Monitor System)) The indicator check is automatically performed when panel diagnosis is activated. Check that the indicators light up and go off 4 times at 1 second intervals continuously. HINT: The sensor check automatically starts when the indicator check is completed. Press the "OFF" switch to cancel check mode. TEXT IN ILLUSTRATION *1 Multi-display Assembly (w/ Audio and Visual System (w/ Multi-display with Parking Assist Monitor System)) *2 Multi-display Assembly (w/ Navigation System) *3 Accessory Meter Assembly (w/ Audio and Visual System (w/o Multi-display)) *4 Multi-display Assembly (w/ Multi-display without parking Assist Monitor System) *5 Multi-media Module Receiver Assembly (w/ Audio and Visual System (w/ Multi-display with Parking Assist Monitor System)) *6 Multi-media Module Receiver Assembly (w/ Navigation System) *7 Radio Receiver Assembly (w/ Audio and Visual System (w/o Multi-display)) *8 Radio Receiver Assembly (w/ Audio and Visual System (w/ Multi-display without Parking Assist Monitor System)) *a Indicator Blinking Pattern *b ON *c OFF *d 1 Sec.
5. SENSOR CHECK (DTC CHECK) Start the engine and warm it up. Perform the indicator check. HINT: After the indicator check is completed, the system enters DTC check mode automatically. Read the DTCs displayed on the display. NOTE: In sensor check mode, which is automatically entered after indicator check mode, troubleshooting may be partially performed. Be sure to perform the sensor check again. HINT: Refer to Diagnostic Trouble Code Chart for details of the codes. Refer to «DIAGNOSTIC TROUBLE CODE CHART [06/2012 - ]»(ref-598464-S34792749392014021400000) . When there are no problems, DTC 00 is output. As an example, the illustration shows that DTC 12 is output. TEXT IN ILLUSTRATION *1 Multi-display Assembly (w/ Audio and Visual System (w/ Multi-display with Parking Assist Monitor System)) *2 Multi-display Assembly (w/ Navigation System) *3 Accessory Meter Assembly (w/ Audio and Visual System (w/o Multi-display)) *4 Multi-display Assembly (w/ Multi-display without parking Assist Monitor System) *5 Multi-media Module Receiver Assembly (w/ Audio and Visual System (w/ Multi-display with Parking Assist Monitor System)) *6 Multi-media Module Receiver Assembly (w/ Navigation System) *7 Radio Receiver Assembly (w/ Audio and Visual System (w/ Multi-display without Parking Assist Monitor System)) *8 Diagnostic Trouble Code (DTC) If the steps are difficult to read because they change automatically, press the "driver side TEMP UP" 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 "driver side TEMP UP" switch is pressed. HINT: Press the "OFF" switch to finish panel diagnosis. TEXT IN ILLUSTRATION *1 Multi-media Module Receiver Assembly (w/ Navigation System) *2 Multi-media Module Receiver Assembly (w/ Audio and Visual System (w/ Multi-display with Parking Assist Monitor System)) *3 Radio Receiver Assembly (w/ Audio and Visual System (w/o Multi-display)) *4 Radio Receiver Assembly (w/ Audio and Visual System (w/ Multi-display without Parking Assist Monitor System)) Clear DTCs During the sensor check, press the "FRONT DEF" switch and "REAR DEF" switch simultaneously. TEXT IN ILLUSTRATION *1 Multi-media Module Receiver Assembly (w/ Navigation System) *2 Multi-media Module Receiver Assembly (w/ Audio and Visual System (w/ Multi-display with Parking Assist Monitor System)) *3 Radio Receiver Assembly (w/ Audio and Visual System (w/o Multi-display)) *4 Radio Receiver Assembly (w/ Audio and Visual System (w/ Multi-display without Parking Assist Monitor System))

DTC CHECK / CLEAR [06/2012 - ]

1. DTC CHECK 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 / Trouble Codes. Check for DTCs.
2. DTC CLEAR 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 / Trouble Codes. Clear the DTCs.

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1. REFRIGERANT SHORTAGE CHECK IN NORMAL OPERATION (CHECK A/C SWITCH INDICATOR AND DTC) TEXT IN ILLUSTRATION *1 A/C Switch Indicator Illuminated - - Start the engine. Check that the A/C switch indicator remains on when the following conditions are met. MEASUREMENT CONDITION Item Condition A/C switch On A/C operation time 15 minutes or more Ambient temperature* 0 to 49°C (32 to 120°F) Engine coolant temperature 45°C (113°F) or more *: If the ambient temperature is not within the range shown, do not perform this check. HINT: The A/C switch indicator and air conditioning system turn off if the amount of refrigerant in the system is insufficient. Connect the Techstream to the DLC3. Check for DTC B14B8. RESULT Result Amount of Refrigerant Corrective Action DTC B14B8 is output Empty or nearly empty Check for refrigerant leaks using a halogen leak detector, and repair if necessary. Refer to «REPLACEMENT [06/2012 - ]»(ref-598598-S25438424062014021400000) . DTC B14B8 is not output Correct or insufficient Perform a refrigerant shortage check using the Techstream.
2. REFRIGERANT SHORTAGE CHECK USING TECHSTREAM Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Enter the following menus: Body Electrical / Air Conditioner / Utility / Refrigerant Shortage Check. According to the display on the Techstream, perform the refrigerant shortage check when the following conditions are met. MEASUREMENT CONDITION Item Condition A/C switch On Ambient temperature* 0 to 49°C (32 to 120°F) R/F switch Fresh (Ambient temperature is 31°C (87°F) or more) Recirculation (Ambient temperature is 30°C (86°F) or less) Blower speed HI Temperature setting MAX HOT *: If the ambient temperature is not within the range shown, do not perform this check. HINT: Refer to the Techstream operator's manual for further details. A message indicating a refrigerant shortage is displayed on the Techstream and the air conditioning system turns off if the amount of refrigerant in the system is insufficient. DTCs are not stored when performing the refrigerant shortage check using the Techstream. RESULT Result Amount of Refrigerant Corrective Action Refrigerant shortage Insufficient or leakage Check for refrigerant leaks using a halogen leak detector, and repair if necessary. Refer to «REPLACEMENT [06/2012 - ]»(ref-598598-S25438424062014021400000) . Evacuate the air conditioning system and charge it with the appropriate volume of new or purified refrigerant. Refrigerant correct Correct

DATA LIST / ACTIVE TEST [06/2012 - ]

1. DATA LIST Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time. NOTE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Air Conditioner / Data List. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Room Temperature Sensor Room temperature sensor (cooler thermistor) / Min.: -6.50°C (20.30°F) Max.: 57.25°C (135.05°F) Actual cabin temperature displayed - Ambient Temp Sensor Ambient temperature sensor (thermistor assembly) / Min.: -23.30°C (-9.94°F) Max.: 65.95°C (150.71°F) Actual ambient temperature displayed - Adjusted Ambient Temp Adjusted ambient temperature / Min.: -30.80°C (-23.44°F) Max.: 50.80°C (123.44°F) - - Evaporator Fin Thermistor Evaporator temperature sensor (No. 1 cooler thermistor) / Min.: -29.70°C (-21.46°F) Max.: 59.55°C (139.19°F) Actual evaporator temperature displayed - Evaporator Target Temp Evaporator target temperature / Min.: -327.68°C (-557.82°F) Max.: 327.67°C (621.81°F) Evaporator target temperature displayed - Solar Sensor (D Side) Driver side solar sensor (automatic light control sensor) / Min.: 0 Max.: 255 Driver side solar sensor (automatic light control sensor) value increases as brightness increases - Solar Sensor (P Side) Front passenger side solar sensor (automatic light control sensor) / Min.: 0 Max.: 255 Front passenger side solar sensor (automatic light control sensor) value increases as brightness increases - Engine Coolant Temp Engine coolant temperature sensor / Min.: 1.30°C (34.34°F) Max.: 90.55°C (194.99°F) Actual engine coolant temperature displayed - Set Temperature (D Side) Driver side set temperature / Min.: MAX COLD Max.: MAX HOT Driver side set temperature displayed - Set Temperature (P Side) Front passenger side set temperature / Min.: MAX COLD Max.: MAX HOT Front passenger side set temperature displayed - Blower Motor Speed Level Blower motor speed level / Min.: 0 Max.: 31 Displayed speed level increases in range between 0 and 31 as blower motor speed increases - Emission Gas Nox Sensor Emission gas (NOx) / Min.: 0 Max.: 255 Smog ventilation sensor value increases as gas amount increases - Emission Gas Sensor Emission gas (HC, CO) / Min.: 0 Max.: 255 Smog ventilation sensor value increases as gas amount increases - Regulator Pressure Sensor Air conditioning pressure sensor / Min.: -66.22 psi (gauge) Max.: 477.68 psi (gauge) Actual pressure is displayed - Regulator Control Current Solenoid valve control current / Min.: 0 A Max.: 0.997 A Value changes between 0 A and 0.997 A in accordance with solenoid valve operation - Air Mix Servo Targ Pulse(D) No. 2 air conditioning radiator damper servo sub-assembly (air mix*1) target pulse / Min.: 0 Max.: 255 MAX. COLD: 5 (pulse) MAX. HOT: 103 (pulse) - Air Mix Servo Actual Pulse(D) No. 2 air conditioning radiator damper servo sub-assembly (air mix*1) actual pulse / Min.: 0 Max.: 255 MAX. COLD: 5 (pulse) MAX. HOT: 103 (pulse) - Air Mix Servo Targ Pulse(P) No. 1 air conditioning radiator damper servo sub-assembly (air mix*2) target pulse / Min.: 0 Max.: 255 MAX. COLD: 105 (pulse) MAX. HOT: 7 (pulse) - Air Mix Servo Actual Pulse(P) No. 1 air conditioning radiator damper servo sub-assembly (air mix*2) actual pulse / Min.: 0 Max.: 255 MAX. COLD: 105 (pulse) MAX. HOT: 7 (pulse) - Air Outlet Servo Pulse (D) No. 1 air conditioning radiator damper servo sub-assembly (air outlet) target pulse / Min.: 0 Max.: 255 FACE: 8 (pulse) B/L: 30 (pulse) FOOT (manual mode): 67 (pulse) FOOT (automatic mode): 60, 67, 74 (pulse) FOOT/DEF: 80 (pulse) DEF: 97 (pulse) - Air Outlet Servo Actu Pulse(D) No. 1 air conditioning radiator damper servo sub-assembly (air outlet) actual pulse / Min.: 0 Max.: 255 FACE: 8 (pulse) B/L: 30 (pulse) FOOT (manual mode): 67 (pulse) FOOT (automatic mode): 60, 67, 74 (pulse) FOOT/DEF: 80 (pulse) DEF: 97 (pulse) - Air Inlet Damper Targ Pulse No. 1 blower damper servo sub-assembly (air inlet) target pulse / Min.: 0 Max.: 255 RECIRCULATION: 7 (pulse) FRESH: 28 (pulse) - Air Inlet Damper Actual Pulse No. 1 blower damper servo sub-assembly (air inlet) actual pulse / Min.: 0 Max.: 255 RECIRCULATION: 7 (pulse) FRESH: 28 (pulse) - Electric Heater Count*3 Maximum heater operation level / Min.: 0 Max.: 2 Maximum possible operation level of quick heater assembly (PTC heater) displayed - Electric Heater Active Level*3 Actual heater operation level / Min.: 0 Max.: 2 Actual operation level of quick heater assembly (PTC heater) displayed - Shift Set Temperature Shift set temperature / 2C decr, 1C decr, Normal, 1C incr, 2C incr Customized value displayed - Air Inlet Mode*4 Air inlet mode / Auto or Manual Customized value displayed - Compressor Mode Compressor mode / Auto or Manual Customized value displayed - Evaporator Control Evaporator control / Auto or Manual Customized value displayed - Emission Gas Sensor Shift Emission gas sensor shift / Mu Less, Less, Li Less, Normal, Li More, More, Mu More Customized value displayed - ECO MODE Cancel ECO mode cancel / OFF or ON Customized value displayed - ECO Switch ECO mode switch (integration control and panel assembly) / OFF or ON ECO mode switch (integration control and panel assembly) not turned: OFF - ECO mode switch (integration control and panel assembly) being turned and held at ECO position: ON - Refrigerant Shortage Check Refrigerant shortage check / ON or OFF Customized value displayed - Fan speed increment control Fan speed increment control / Slow, Normal, Fast Customized value displayed - Foot/DEF Auto Mode Foot/DEF auto mode / ON or OFF Customized value displayed - Foot/DEF Auto Blow Up Foot/DEF auto blower speed increase / ON or OFF Customized value displayed - Ambient Temperature Shift Ambient temperature shift / 3C decr, 2C decr, 1C decr, Normal, 1C incr, 2C incr, 3C incr Customized value displayed - Flow Sensor A/C flow sensor / Min.: 0.0 V Max.: 5.0 V A/C on, Blower switch HI: 0.7 to 3.8 V A/C off, Blower switch off: 3.8 to 4.2 V Flow sensor is malfunctioning when a constant value between 0.7 and 4.2 V is displayed continuously for more than 4 seconds. A/C Cutoff Signal A/C control cutoff signal / OFF or ON A/C switch on: OFF A/C switch off: ON - Number of Trouble Codes Number of trouble codes / Min.: 0 Max.: 255 Number of DTCs displayed - *1: for Driver Side *2: for Front Passenger Side *3: w/ Quick Heater Assembly *4: for Korea and Mexico
2. ACTIVE TEST Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests. 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. AIR CONDITIONER Tester Display Test Part Control Range Diagnostic Note Blower Motor Blower motor with fan sub-assembly Min.: 0, Max.: 31 - Magnetic Clutch Relay A/C system operation OFF, ON - Defogger Relay (Rear) Rear window defogger OFF, ON - Deicer Relay (Front)*4 Windshield deicer OFF, ON - Heater Active Level*3 Quick heater assembly Min.: 0, Max.: 2 - Air Mix Servo Targ Pulse(D) No. 2 air conditioning radiator damper servo sub-assembly (air mix*1) pulse Min.: 0, Max.: 255 Operates between 5 and 103 pulses Air Mix Servo Targ Pulse(P) No. 1 air conditioning radiator damper servo sub-assembly (air mix*2) pulse Min.: 0, Max.: 255 Operates between 7 and 105 pulses Air Outlet Servo Pulse (D) No. 1 air conditioning radiator damper servo sub-assembly (air outlet) pulse Min.: 0, Max.: 255 Operates between 8 and 97 pulses Air Inlet Damper Targ Pulse No. 1 blower damper servo sub-assembly (air inlet) pulse Min.: 0, Max.: 255 Operates between 7 and 28 pulses *1: for Driver Side *2: for Front Passenger Side *3: w/ Quick Heater Assembly *4: Windshield Deicer System

DIAGNOSTIC TROUBLE CODE CHART [06/2012 - ]

AIR CONDITIONING SYSTEM

1. *1: If the cabin temperature is approximately -18.6°C (-1.48°F) or lower, DTC B1411/11 may be output even though the system is normal.
2. *2: If the ambient temperature is approximately -52.9°C (-63.22°F) or lower, DTC B1412/12 may be output even though the system is normal.
3. *3: The air conditioning amplifier assembly stores the DTC of the respective malfunction if it has occurred for the period of time indicated in the brackets.
4. *4: w/ Multi-display
5. *5: w/o Multi-display