Air Conditioning System (Diagnostics - Introduction): Diagnosis Lexus GS IV

HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]

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 AUXILIARY BATTERY VOLTAGE Inspect the auxiliary battery voltage. Standard voltage 11 to 14 V If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step. Using the Techstream, inspect auxiliary battery voltage reduction history "Battery Control Count (Body ECU)" in the Data List. Refer to «DATA LIST / ACTIVE TEST [03/2012 - ]»(ref-600435-S04392871162014022400000) . 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. Refer to «DIAGNOSIS SYSTEM [03/2012 - ]»(ref-600620-S06280412312014022400000) . RESULT Result Proceed to CAN DTC is not output A CAN DTC is output B B --> GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600588-S38298476802014022400000) A: Go to next step
4. CHECK FOR DTC* Check for DTCs and note any code that is output. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600428-S10848817492014022400000) . Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600428-S10848817492014022400000) . Recheck for DTCs. Based on the DTCs output above, try to force the air conditioning system to output DTCs by simulating the conditions indicated by the DTC. RESULT Result Proceed to DTC is output A DTC is not output B B --> GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART [03/2012 - ]»(ref-600428-S38197097572014022400000) A: Go to next step
5. PROBLEM SYMPTOMS TABLE Refer to Problem Symptoms Table. Refer to «PROBLEM SYMPTOMS TABLE [03/2012 - ]»(ref-600428-S12585308122014022400000) . RESULT Result Proceed to Fault is not listed in Problem Symptoms Table A Fault is listed in Problem Symptoms Table B B --> ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE A: Go to next step
6. OVERALL ANALYSIS AND TROUBLESHOOTING* Panel diagnosis (indicator check, sensor check). Refer to «DIAGNOSIS SYSTEM [03/2012 - ]»(ref-600428-S28516345682014022400000) Data List / Active Test. Refer to «DATA LIST / ACTIVE TEST [03/2012 - ]»(ref-600428-S08067317772014022400000) Terminals of ECU. Refer to «TERMINALS OF ECU [03/2012 - ]»(ref-600428-S41688021252014022400000) On-vehicle Inspection Inspection NEXT: Go to next step
7. ADJUST, REPAIR OR REPLACE NEXT --> END

PROBLEM SYMPTOMS TABLE [03/2012 - ]

Note. Inspect the fuses and relays related to this system before inspecting the suspected areas below. *1: If an attempt is made to operate the PTC heater when the voltage of the vehicle battery has decreased, the PTC heater will not operate as the power steering system is given priority. *2: Even when all the inspected areas are normal, the system may not change to the driver seat control mode due to the ambient temperature, etc. Also, even if the front passenger seat is unoccupied, the system may not change to the driver seat control mode due to control conditions.

HINT

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

AIR CONDITIONING SYSTEM

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1. AIR CONDITIONING AMPLIFIER ASSEMBLY Disconnect the N78 air conditioning amplifier assembly connector. Measure the voltage and resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition N78-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms N78-5 (IG+) - N78-1 (GND) L - W-B Power source (IG) Power switch on (IG) 11 to 14 V N78-5 (IG+) - N78-1 (GND) L - W-B Power source (IG) Power switch off Below 1 V N78-6 (+B1) - N78-1 (GND) W - W-B Power source (+B) Always 11 to 14 V HINT: If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the N78 air conditioning amplifier assembly connector. Measure the voltage, resistance and waveform according to the value(s) in the table below. 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 N78-3 (BLW) - N78-1 (GND) W - W-B Blower motor speed control signal Power switch on (IG) Blower switch: Lo Pulse generation (See waveform 1 in step e ) N78-8 (PTC1) - N78-1 (GND)* Y - W-B PTC heater relay operation signal Power switch on (Ready) IDH signal terminal: Below 1 V Combination switch: off Set temperature: HI Engine coolant temperature: 64°C (147.2°F) or lower Ambient temperature: 10°C (50.0°F) or lower Blower switch: off 11 to 14 V N78-8 (PTC1) - N78-1 (GND)* Y - W-B PTC heater relay operation signal Power switch on (Ready) IDH signal terminal: Below 1 V Combination switch: off Set temperature: HI Engine coolant temperature: 64°C (147.2°F) or lower Ambient temperature: 10°C (50.0°F) or lower Blower switch: Lo or more (after 10 seconds) Below 1 V N78-21 (RLIN) - N78-1 (GND) P - W-B LIN communication signal Power switch on (IG) Pulse generation N78-23 (IDH) - N78-1 (GND) W - W-B IDH signal Power switch on (Ready) Quick heater assembly operation permitted Below 1 V N78-23 (IDH) - N78-1 (GND) W - W-B IDH signal Power switch on (Ready) Quick heater assembly operation not permitted 4.75 to 5.25 V N78-26 (PTC2) - N78-1 (GND)* B - W-B PTC heater relay operation signal Power switch on (Ready) IDH signal terminal: Below 1 V Combination switch: off Set temperature: HI Engine coolant temperature: 64°C (147.2°F) or lower Ambient temperature: 10°C (50.0°F) or lower Blower switch: off 11 to 14 V N78-26 (PTC2) - N78-1 (GND)* B - W-B PTC heater relay operation signal Power switch on (Ready) IDH signal terminal: Below 1 V Combination switch: off Set temperature: HI Engine coolant temperature: 64°C (147.2°F) or lower Ambient temperature: 10°C (50.0°F) or lower Blower switch: Lo or more (after 20 seconds) Below 1 V N78-29 (ECOS) - N78-1 (GND) P - W-B Combination switch assembly operation signal Power switch on (IG) Combination switch assembly not turned 11 to 14 V N78-29 (ECOS) - N78-1 (GND) P - W-B Combination switch assembly operation signal Power switch on (IG) Combination switch assembly being turned and held at ECO position Below 1 V N80-1 (SG-1) - Body ground G - Body ground Ground for room temperature sensor Always Below 1 ohms N80-3 (CANH) - N80-4 (CANL) R - W CAN communication system CAN communication occurring Pulse generation N80-5 (S5-1) - N78-1 (GND) R - W-B Power supply for room humidity sensor, glass temperature sensor and glass surroundings temperature sensor Power switch on (IG) 4.75 to 5.25 V N80-7 (TSD) - N78-1 (GND) SB - W-B Solar sensor signal (for Driver side) Power switch on (IG) Solar sensor subjected to electric light 0.8 to 4.3 V N80-7 (TSD) - N78-1 (GND) SB - W-B Solar sensor signal (for Driver side) Power switch on (IG) Solar sensor covered with a cloth Below 0.8 V N80-8 (TSP) - N78-1 (GND) V - W-B Solar sensor signal (for Front passenger side) Power switch on (IG) Solar sensor subjected to electric light 0.8 to 4.3 V N80-8 (TSP) - N78-1 (GND) V - W-B Solar sensor signal (for Front passenger side) Power switch on (IG) Solar sensor covered with a cloth Below 0.8 V N80-9 (PRE) - N80-32 (SG-2) P - GR Air conditioning pressure sensor signal Power switch on (Ready) Blower switch: Lo A/C switch: on (magnet clutch on) Refrigerant pressure: normal pressure (more than 196 kPa (2.0 kgf/cm 2 , 28 psi) to less than 3138 kPa (32 kgf/cm 2 , 455 psi)) 0.63 to 4.73 V N80-10 (TAM) - N80-32 (SG-2) V - GR Ambient temperature sensor signal Power switch on (IG) Ambient temperature: 25°C (77°F) 1.35 to 1.75 V N80-13 (S5-3) - N80-32 (SG-2) LG - GR Power supply for flow sensor Power switch off Below 1 V N80-13 (S5-3) - N80-32 (SG-2) LG - GR Power supply for flow sensor Power switch on (IG) 4.75 to 5.25 V N80-16 (TR) - N80-1 (SG-1) P - G Room temperature sensor signal Power switch on (IG) Cabin temperature: 25°C (77°F) 1.8 to 2.2 V N80-21 (TNG) - N80-33 (SG-5) GR - SB Glass surroundings temperature sensor signal Power switch on (IG) Glass surroundings temperature: 25°C (77°F) 3.65 to 3.69 kohms N80-22 (TFG) - N80-33 (SG-5) V - SB Glass temperature sensor signal Power switch on (IG) Glass temperature: 25°C (77°F) 3.65 to 3.69 kohms N80-23 (RH) - N80-33 (SG-5) Y - SB Room humidity sensor signal Power switch on (IG) Cabin temperature: 25°C (77°F) Glass humidity: 40% 2.09 V N80-23 (RH) - N80-33 (SG-5) Y - SB Room humidity sensor signal Power switch on (IG) Cabin temperature: 25°C (77°F) Glass humidity: 60% 2.81 V N80-24 (DGS) - N80-32 (SG-2) R - GR Smog ventilation sensor signal (CO, HC) Power switch on (IG) Cabin temperature: 20°C (68°F) Glass humidity: 60% Spray the clean air 15 to 40 kohms N80-24 (DGS) - N80-32 (SG-2) R - GR Smog ventilation sensor signal (CO, HC) Power switch on (IG) Cabin temperature: 20°C (68°F) Glass humidity: 40% Spray the clean air 1.5 to 240 kohms N80-25 (DGS1) - N80-32 (SG-2) L - GR Smog ventilation sensor signal (NOx) Power switch on (IG) Cabin temperature: 20°C (68°F) Glass humidity: 65% Spray the clean air 2.5 to 40 kohms N80-32 (SG-2) - Body ground GR - Body ground Ground for air conditioning pressure sensor, ambient temperature sensor, flow sensor, compressor lock sensor and smog ventilation sensor Always Below 1 ohms N80-33 (SG-5) - Body ground SB - Body ground Ground for room humidity sensor, glass temperature sensor and glass surroundings temperature sensor Always Below 1 ohms z1-1 (BUS G) - Body ground - Ground for BUS IC Always Below 1 ohms z1-2 (BUS) - z1-1 (BUS G) - BUS IC control signal Power switch on (IG) Pulse generation (See waveform 2 in step f ) z1-3 (B BUS) - z1-1 (BUS G) - Power supply for BUS IC Always 11 to 14 V z1-12 (SGA) - Body ground - Ground for evaporator temperature sensor Always Below 1 V z1-11 (TEA) - z1-12 (SGA) - Evaporator temperature sensor signal Power switch on (IG) Evaporator temperature: 0°C (32°F) 2.0 to 2.4 V z1-11 (TEA) - z1-12 (SGA) - Evaporator temperature sensor signal Power switch on (IG) Evaporator temperature: 15°C (59°F) 1.4 to 1.8 V *: w/ PTC Heater Waveform 1: Item Content Terminal No. (Symbol) N78-3 (BLW) - N78-1 (GND) Tool Setting 1 V/DIV., 500 μs/DIV. Vehicle Condition Power switch on (IG) Blower switch: Lo Waveform 2: Item Content Terminal No. (Symbol) z1-2 (BUS) - z1-1 (BUS G) Tool Setting 1 V/DIV., 2 ms./DIV. Vehicle Condition Power switch on (IG)
2. REAR CONTROL SWITCH (w/ Rear Control Switch) Disconnect the Z1 rear control switch connector. Measure the voltage and resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition Z1-1 (+B) - Z1-5 (E) R - W-B Power source (+B) Always 11 to 14 V Z1-7 (IG+) - Z1-5 (E) L - W-B Power source (IG) Power switch off Below 1 V Z1-7 (IG+) - Z1-5 (E) L - W-B Power source (IG) Power switch on (IG) 11 to 14 V Z1-5 (E) - Body ground W-B - Body ground Ground Always Below 1 ohms HINT: If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the Z1 rear control switch connector. Measure the waveform according to the value(s) in the table below. HINT: Check from the rear of the connector while it is connected to the rear control switch. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition Z1-9 (RLIN) - Z1-5 (E) P - W-B LIN communication signal Power switch on (IG) Pulse generation
3. POWER MANAGEMENT CONTROL ECU POWER MANAGEMENT CONTROL ECU Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A35-1 (+B2) - N91-6 (E1) W - W-B Power source (+B) Power switch on (IG) 11 to 14 V A35-2 (WP) - N91-6 (E1) P - W-B Heater accessory assembly signal Power switch on (Ready) Air conditioning system stopped 11 to 14 V A35-2 (WP) - N91-6 (E1) P - W-B Heater accessory assembly signal Power switch on (Ready) Air conditioning system operated 0 to 2 V A36-1 (IG2) - N91-6 (E1) B - W-B Power source (IG) Power switch on (IG) 11 to 14 V A36-3 (+B1) - N91-6 (E1) W - W-B Power source (+B) Power switch on (IG) 11 to 14 V A36-16 (CLK) - N91-6 (E1) Y - W-B Air conditioning system communication signal Power switch on (Ready) Air conditioning system stopped Pulse generation (See waveform 1 in step a ) A36-19 (STB) - N91-6 (E1) LG - W-B Air conditioning system communication signal Power switch on (Ready) Air conditioning system stopped Pulse generation (See waveform 1 in step a ) A36-18 (ETI) - N91-6 (E1) V - W-B Air conditioning system communication signal Power switch on (Ready) Air conditioning system stopped Pulse generation (See waveform 1 in step a ) A36-17 (ITE) - N91-6 (E1) W - W-B Air conditioning system communication signal Power switch on (Ready) Air conditioning system stopped Pulse generation (See waveform 1 in step a ) N92-24 (CA1L) - N91-6 (E1) W - W-B CAN communication signal Power switch on (IG) Pulse generation (See waveform 2 in step b ) N92-25 (CA1H) - N91-6 (E1) P - W-B CAN communication signal Power switch on (IG) Pulse generation (See waveform 2 in step b ) Waveform 1: Item Content Terminal CH1: A36-16 (CLK) - N91-6 (E1) CH2: A36-17 (ITE) - N91-6 (E1) CH3: A36-18 (ETI) - N91-6 (E1) CH4: A36-19 (STB) - N91-6 (E1) Equipment Setting 10 V/DIV., 100 ms./DIV. Condition Power switch on (Ready) Air conditioning system stopped HINT: The waveform will vary depending on the content of the digital communication (digital signal). Waveform 2: Item Content Terminal CH1: N92-25 (CA1H) - N91-6 (E1) CH2: N92-24 (CA1L) - N91-6 (E1) Equipment Setting 1 V/DIV., 50 μs./DIV. Condition Power switch on (IG) HINT: The waveform will vary depending on the content of the digital communication (digital signal).

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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 [03/2012 - ]»(ref-600412-S13764201052014022400000) .
3. LIST OF OPERATION METHODS By operating each of the air conditioning control switches as shown in the diagram below in illustration, it is possible to enter diagnostic check mode.
4. INDICATOR CHECK Turn the power switch off. Turn the power switch on (ACC) and wait at least 5 seconds. Turn the power switch on (IG) while pressing the air conditioning control assembly "AUTO" switch and "Recirculation/Fresh" switch simultaneously. Hold both switches until the indicator check screen appears. 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. TEXT IN ILLUSTRATION *a Indicator Blinking Pattern *b On *c Off *d 1 second HINT: The sensor check automatically starts when the indicator check is completed. Press the "OFF" switch to cancel check mode.
5. SENSOR CHECK (DTC CHECK) Turn the power switch on (Ready). Perform the indicator check. HINT: After the indicator check is completed, the system enters DTC check mode automatically. Read the DTC displayed on the accessory meter display. TEXT IN ILLUSTRATION *a Diagnostic Trouble Code (DTC) 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 [03/2012 - ]»(ref-600428-S38197097572014022400000) . When there are no problems, DTC 00 is output. As an example, the illustration shows that DTC 12 is output. If the DTCs are difficult to read because they change automatically, push the driver side "TEMP" switch to display the DTCs one at a time so that they can be read easily. The DTCs change step by step each time the driver side "TEMP" switch is pushed. HINT: Press the "OFF" switch to finish panel diagnosis. Clear DTCs During the sensor check, press the "FRONT DEF" switch and "REAR DEF" switch simultaneously.

DTC CHECK / CLEAR [03/2012 - ]

1. DTC CHECK USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Air Conditioner / DTC. Check for DTCs.
2. DTC CLEAR USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Air Conditioner / DTC. Clear DTCs.

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1. REFRIGERANT SHORTAGE CHECK IN NORMAL OPERATION (CHECK A/C SWITCH INDICATOR AND DTC) Turn the power switch on (Ready). Check that A/C switch indicator remains on when the following conditions are met. TEXT IN ILLUSTRATION *1 A/C Switch *a Example MEASUREMENT CONDITION Item Condition A/C Switch On Air conditioning 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. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600428-S10848817492014022400000) . 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 «DTC B14A8: Glass Temperature Sensor Circuit»(ref-600601-S09716992552014022400000) . DTC B14B8 is not output Correct or insufficient Perform a refrigerant shortage check using the Techstream.
2. REFRIGERANT SHORTAGE CHECK USING THE TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (Ready). 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) *: 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 [03/2012 - ]»(ref-600577-S31273849072014022400000) . Evacuate the air conditioning system and charge it with the appropriate volume of new or purified refrigerant. Refer to «REPLACEMENT [03/2012 - ]»(ref-600577-S31273849072014022400000) . Refrigerant correct Correct
3. INSPECT THE ENERGY CONSERVATION AIRFLOW CONTROL Put the vehicle in the following conditions. [*1] MEASUREMENT CONDITION Item Condition Vehicle body Vehicle stopped in the shade Doors Fully open Blower speed Low or more A/C switch On With the conditions in step [*1], set the air conditioning to AUTO mode and allow the blower vent temperature to stabilize (approximately 5 to 6 minutes). Check that the S-FLOW switch indicator illuminates when the S-FLOW switch is operated once. Check the operation of the energy conservation airflow control function. HINT: When the cooling or heating operation systems are not being operated and the ambient and vehicle interior temperatures are stable, the system enters front seat air blow control mode. If the system is in front seat air blow control mode, the ambient and vehicle interior temperatures are stabilized, and only the driver's seat is occupied, the system automatically enters driver seat air blow control mode. The system may not enter driver seat control mode due to the ambient temperature, etc. w/ Rear Control Switch: When only the driver's seat is occupied, check that airflow to the rear seats stops, the rear control panel turns off, airflow to the front passenger seat stops, and the set temperature display turns off. When the front passenger seat is occupied, check that airflow to the rear seats stops, the rear control panel turns off, and airflow to the driver's and front passenger seats continues. Check that the S-FLOW switch indicator turns off and energy conservation airflow control is canceled when the S-FLOW switch is operated once again or when the rear control switch is changed to AUTO mode or turned OFF. w/o Rear Control Switch: When only the driver's seat is occupied or when the front passenger seat is occupied, check that airflow to the rear seats stops, airflow to the driver's and front passenger seats continues. Operate the S-FLOW switch once again and check that the S-FLOW switch indicator turns off and that energy conservation airflow control is canceled.

DATA LIST / ACTIVE TEST [03/2012 - ]

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 power 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 Cooler thermistor / min.: -6.50°C (20.30°F) max.: 57.25°C (135.05°F) Actual cabin temperature displayed - Ambient Temp 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 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 automatic light control sensor / Min.: 0, Max.: 255 Driver side automatic light control sensor value increases as brightness increases - Solar Sensor (P Side) Front passenger side automatic light control sensor / Min.: 0, Max.: 255 Front passenger side 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) Passenger side set temperature / Min.: MAX COLD Max.: MAX HOT 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 Smog ventilation sensor / Min.: 0, Max.: 255 Displays concentration of exhaust gas (NOx) around smog ventilation sensor (increases when concentration of exhaust gas increases) - Emission Gas Sensor Smog ventilation sensor / Min.: 0, Max.: 255 Displays concentration of exhaust gas (CO, HC) around smog ventilation sensor (increases when concentration of exhaust gas increases) - Regulator Pressure Sensor Air conditioning pressure sensor / Min.: -456.68 kPa, Max.: 3294.37 kPa Actual pressure displayed - Set Temperature (Rear) Rear set temperature / Min.: MAX COLD Max.: MAX HOT Actual rear set temperature displayed - Air Outlet Servo Pulse (R) No. 7 air conditioning radiator damper servo sub-assembly target pulse / Min.: 128, Max.: 383 FACE1: 245 (pulse) FACE2: 242 (pulse) FACE: 242 (pulse) B/L1: 284 (pulse) B/L: 284 (pulse) B/L2: 303 (pulse) FOOT: 303 (pulse) FOOT/DEF: 333 (pulse) DEF: 353 (pulse) - Air Outlet Servo Actual Pls(R) No. 7 air conditioning radiator damper servo sub-assembly actual pulse / Min.: 128, Max.: 383 FACE1: 245 (pulse) FACE2: 242 (pulse) FACE: 242 (pulse) B/L1: 284 (pulse) B/L: 284 (pulse) B/L2: 303 (pulse) FOOT: 303 (pulse) FOOT/DEF: 333 (pulse) DEF: 353 (pulse) - Air Mix Servo Targ Pulse(R) No. 3 air conditioning radiator damper servo sub-assembly (rear side air mix) target pulse / Min.: 128, Max.: 383 MAX. COLD*2: 254 (pulse) MAX. HOT*3: 360 (pulse) - Air Mix Servo Actual Pulse(R) No. 3 air conditioning radiator damper servo sub-assembly (rear side air mix) actual pulse / Min.: 128, Max.: 383 MAX. COLD*2: 254 (pulse) MAX. HOT*3: 360 (pulse) - Air Mix Servo Targ Pulse(D) No. 2 air conditioning radiator damper servo sub-assembly (driver side upper air mix) target pulse / Min.: 128, Max.: 383 MAX. COLD*2: 254 (pulse) MAX. HOT*3: 360 (pulse) - Air Mix Servo Actual Pulse(D) No. 2 air conditioning radiator damper servo sub-assembly (driver side upper air mix) actual pulse / Min.: 128, Max.: 383 MAX. COLD*2: 254 (pulse) MAX. HOT*3: 360 (pulse) - Air Mix Servo Targ Pulse(P) No. 2 air conditioning radiator damper servo sub-assembly (front passenger side upper air mix) target pulse / Min.: 128, Max.: 383 MAX. COLD*2: 258 (pulse) MAX. HOT*3: 152 (pulse) - Air Mix Servo Actual Pulse(P) No. 2 air conditioning radiator damper servo sub-assembly (front passenger side upper air mix) actual pulse / Min.: 128, Max.: 383 MAX. COLD*2: 258 (pulse) MAX. HOT*3: 152 (pulse) - Air Outlet Servo Pulse (D) No. 6 air conditioning radiator damper servo sub-assembly target pulse / Min.: 128, Max.: 383 FACE1: 254 (pulse) FACE2: 245 (pulse) FACE: 230 (pulse) B/L: 217 (pulse) B/L2: 209 (pulse) FOOT-0 (for save energy and airflow control function): 183 (pulse) FOOT-0 (except save energy and airflow control function): 199 (pulse) FOOT-D: 199 (pulse) FOOT-R (for save energy and airflow control function): 183 (pulse) FOOT-R (except save energy and airflow control function): 191 to 199 (pulse) FOOT-F (manual mode and for save energy and airflow control function): 183 (pulse) FOOT-F (manual mode and except save energy and airflow control function): 199 (pulse) FOOT-F (automatic mode): 183 (pulse) FOOT/DEF: 168 (pulse) DEF: 140 (pulse) - Air Outlet Servo Actu Pulse(D) No. 6 air conditioning radiator damper servo sub-assembly actual pulse / Min.: 128, Max.: 383 FACE1: 254 (pulse) FACE2: 245 (pulse) FACE: 230 (pulse) B/L: 217 (pulse) B/L2: 209 (pulse) FOOT-0 (for save energy and airflow control function): 183 (pulse) FOOT-0 (except save energy and airflow control function): 199 (pulse) FOOT-D: 199 (pulse) FOOT-R (for save energy and airflow control function): 183 (pulse) FOOT-R (except save energy and airflow control function): 191 to 199 (pulse) FOOT-F (manual mode and for save energy and airflow control function): 183 (pulse) FOOT-F (manual mode and except save energy and airflow control function): 199 (pulse) FOOT-F (automatic mode): 183 (pulse) FOOT/DEF: 168 (pulse) DEF: 140 (pulse) - Air Outlet Servo Targ Pulse(P) No. 5 air conditioning radiator damper servo sub-assembly target pulse / Min.: 128, Max.: 383 FACE1: 258 (pulse) FACE2: 267 (pulse) FACE: 282 (pulse) B/L: 295 (pulse) B/L2: 303 (pulse) FOOT-0 (for save energy and airflow control function): 329 (pulse) FOOT-0 (except save energy and airflow control function): 313 (pulse) FOOT-D: 313 (pulse) FOOT-R (for save energy and airflow control function): 329 (pulse) FOOT-R (except save energy and airflow control function): 313 to 321 (pulse) FOOT-F (manual mode and for save energy and airflow control function): 329 (pulse) FOOT-F (manual mode and except save energy and airflow control function): 313 (pulse) FOOT-F (automatic mode): 329 (pulse) FOOT/DEF: 344 (pulse) DEF: 372 (pulse) - Air Outlet Servo Actu Pulse(P) No. 5 air conditioning radiator damper servo sub-assembly actual pulse / Min.: 128, Max.: 383 FACE1: 258 (pulse) FACE2: 267 (pulse) FACE: 282 (pulse) B/L: 295 (pulse) B/L2: 303 (pulse) FOOT-0 (for save energy and airflow control function): 329 (pulse) FOOT-0 (except save energy and airflow control function): 313 (pulse) FOOT-D: 313 (pulse) FOOT-R (for save energy and airflow control function): 329 (pulse) FOOT-R (except save energy and airflow control function): 313 to 321 (pulse) FOOT-F (manual mode and for save energy and airflow control function): 329 (pulse) FOOT-F (manual mode and except save energy and airflow control function): 313 (pulse) FOOT-F (automatic mode): 329 (pulse) FOOT/DEF: 344 (pulse) DEF: 372 (pulse) - Air Inlet Damper Targ Pulse No. 1 blower damper servo sub-assembly target pulse / Min.: 128, Max.: 383 FRESH: 206 (pulse) RECIRCULATION: 238 (pulse) - Air Inlet Damper Actual Pulse No. 1 blower damper servo sub-assembly actual pulse / Min.: 128, Max.: 383 FRESH: 206 (pulse) RECIRCULATION: 238 (pulse) - Electric Heater Count*1 PTC heater Max. count / Min.: 0, Max.: 2 Max. number of the heater elements to be heated is displayed - Electric Heater Active Level*1 PTC heater actual count / Min.: 0, Max.: 2 Actual number of the heater elements to be heated is displayed - Compressor Speed Compressor with motor assembly speed / Min.: 0 rpm, Max.: 65535 rpm Actual compressor rotation speed displayed - Compressor Target Speed Compressor with motor assembly target speed / Min.: 0 rpm, Max.: 65535 rpm Target compressor rotation speed displayed - Shift Set Temperature Shift set temperature / 2C decr, 1C decr, Normal, 1C incr, 2C incr Customized value displayed - Air Inlet Mode 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 Shift set smog ventilation sensor sensitivity / Normal, Mu More, Li More, Li Less, Less, Mu Less, More Customized value displayed - Add Foot Air in Face Mode Add foot air in face mode / ON or OFF Customized value displayed - Noise and Vibration Reduction Noise and vibration reduction / ON or OFF Customized value displayed - ECO MODE Cancel ECO drive mode cancel / ON or OFF Customized value displayed - ECO Switch Combination switch assembly / OFF or ON ON: Combination switch assembly being turned and held at ECO position OFF: Combination switch assembly not turned - 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 - COOL A/M Servo Targ Pls(D) No. 4 air conditioning radiator damper servo sub-assembly (driver side lower air mix) target pulse / Min.: 128, Max.: 383 MAX. COLD*2: 254 (pulse) MAX. HOT*3: 360 (pulse) - COOL A/M Servo Actual Pulse(D) No. 4 air conditioning radiator damper servo sub-assembly (driver side lower air mix) actual pulse / Min.: 128, Max.: 383 MAX. COLD*2: 254 (pulse) MAX. HOT*3: 360 (pulse) - COOL A/M Servo Targ Pls(P) No. 3 air conditioning radiator damper servo sub-assembly (front passenger side lower air mix) target pulse / Min.: 128, Max.: 383 MAX. COLD*2: 254 (pulse) MAX. HOT*3: 360 (pulse) - COOL A/M Servo Actual Pulse(P) No. 3 air conditioning radiator damper servo sub-assembly (front passenger side lower air mix) actual target pulse / Min.: 128, Max.: 383 MAX. COLD*2: 254 (pulse) MAX. HOT*3: 360 (pulse) - Pls Servo Test Sts Pulse servo motor test status/ Wait, Move, Comp, Error, Stop Pulse servo motor test status - A/O Damper DEF Pos(D Side) No. 1 air conditioning radiator damper servo sub-assembly target pulse / Min.: 128, Max.: 383 FACE1: 164 (pulse) FACE2: 164 (pulse) FACE: 164 (pulse) B/L (manual mode): 164 (pulse) B/L (automatic mode): 164 to 180 (pulse) B/L2: 164 (pulse) FOOT-0: 164 (pulse) FOOT-D: 180 (pulse) FOOT-R: 176 (pulse) FOOT (manual mode): 176 (pulse) FOOT (automatic mode): 176 to 186 (pulse) FOOT/DEF: 270 (pulse) DEF: 270 (pulse) - A/O Damper DEF Actual Pos(D) No. 1 air conditioning radiator damper servo sub-assembly actual pulse / Min.: 128, Max.: 383 FACE1: 164 (pulse) FACE2: 164 (pulse) FACE: 164 (pulse) B/L (manual mode): 164 (pulse) B/L (automatic mode): 164 to 180 (pulse) B/L2: 164 (pulse) FOOT-0: 164 (pulse) FOOT-D: 180 (pulse) FOOT-R: 176 (pulse) FOOT (manual mode): 176 (pulse) FOOT (automatic mode): 176 to 186 (pulse) FOOT/DEF: 270 (pulse) DEF: 270 (pulse) - Compressor Drive Check Compressor drive check / OK or NG OK: Compressor drives NG: Compressor does not drive - Glass Temperature Glass temperature/ Min.: -327.68°C (-557.82°F) Max.: 327.67°C (621.81°F) Actual glass temperature displayed - Glass Surroundings Temperature Glass surroundings temperature/ Min.: -327.68°C (-557.82°F) Max.: 327.67°C (621.81°F) Actual glass surroundings temperature displayed - Glass Humidity Glass humidity/ Min.: 0%, Max.: 100% Actual glass humidity displayed - Number of Trouble Codes Number of trouble codes / Min.: 0, Max.: 255 Number of DTCs displayed - *1: w/ PTC Heater *2: Set temperature: LO *3: Set temperature: HI
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 power 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 with fan motor sub-assembly Min.: 0, Max.: 31 - Compressor Target Speed Compressor with motor assembly Min.: 0, Max.: 7500 - Heater Active Level* Quick heater assembly Min.: 0, Max.: 2 - Air Mix Servo Targ Pulse(D) No. 2 air conditioning radiator damper servo sub-assembly (driver side upper air mix) Min.: 128, Max.: 383 Operates between 152 to 258 pulses Air Mix Servo Targ Pulse(P) No. 2 air conditioning radiator damper servo sub-assembly (front passenger side upper air mix) Min.: 128, Max.: 383 Operates between 254 to 360 pulses Air Outlet Servo Pulse(D) No. 6 air conditioning radiator damper servo sub-assembly Min.: 128, Max.: 383 Operates between 140 to 254 pulses Air Outlet Servo Pulse(P) No. 5 air conditioning radiator damper servo sub-assembly Min.: 128, Max.: 383 Operates between 258 to 372 pulses Air Inlet Damper Targ Pulse No. 1 blower damper servo sub-assembly Min.: 128, Max.: 383 Operates between 206 to 238 pulses Cool A/M Servo Pulse(D) No. 4 air conditioning radiator damper servo sub-assembly (driver side lower air mix) Min.: 128, Max.: 383 Operates between 254 to 360 pulses Cool A/M Servo Pulse(P) No. 3 air conditioning radiator damper servo sub-assembly (front passenger side lower air mix) Min.: 128, Max.: 383 Operates between 254 to 360 pulses A/O Servo Pulse(Rr D) No. 7 air conditioning radiator damper servo sub-assembly Min.: 128, Max.: 383 Operates between 242 to 353 pulses Rear Air Mix Servo Targ Pulse No. 3 air conditioning radiator damper servo sub-assembly (rear side air mix) Min.: 128, Max.: 383 Operates between 254 to 360 pulses DEF A/O Servo Pulse(D) No. 1 air conditioning radiator damper servo sub-assembly Min.: 128, Max.: 383 Operates between 164 to 270 pulses *: w/ PTC Heater

DIAGNOSTIC TROUBLE CODE CHART [03/2012 - ]

AIR CONDITIONING SYSTEM

HYBRID CONTROL 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.