Air Conditioning System (Diagnostics - Introduction): Diagnosis

PROBLEM SYMPTOMS TABLE [04/2013 - ]

Note. If the battery voltage is low, the PTC heater may not operate. When "Operation of Electrical Items Restricted." is displayed on the multi-information display in the combination meter assembly, inspect the battery, referring to On-vehicle Inspection for the charging system. for 2GR-FSE: Refer to ON-VEHICLE INSPECTION [04/2013 - ] for 4GR-FSE: Refer to ON-VEHICLE INSPECTION [04/2013 - ] If the battery voltage is low, the PTC heater may not operate. When "Operation of Electrical Items Restricted." is not displayed on the multi-information display in the combination meter assembly, check the Data List item "Battery Control Count (Body ECU)". Refer to DATA LIST/ACTIVE TEST [04/2013 - ]

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.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Symptom	Suspected Area	Link
All functions of the air conditioning system do not operate	IG power source circuit	Refer to IG Power Source Circuit [04/2013 - ]
	Back-up power source circuit	Refer to Back-up Power Source Circuit [04/2013 - ]
	LIN communication circuit	Refer to DTC B14B2: Lost Communication with Front Panel LIN [04/2013 - ]
	Air conditioning amplifier assembly	Refer to REMOVAL [04/2013 - ]
Air flow Control: No blower operation	Blower motor circuit	Refer to Blower Motor Circuit [04/2013 - ]
	LIN communication circuit	Refer to DTC B14B2: Lost Communication with Front Panel LIN [04/2013 - ]
	Air conditioning amplifier assembly	Refer to REMOVAL [04/2013 - ]
Air flow control: No blower control	Blower motor circuit	Refer to Blower Motor Circuit [04/2013 - ]
	LIN communication circuit	Refer to DTC B14B2: Lost Communication with Front Panel LIN [04/2013 - ]
	Air conditioning amplifier assembly	Refer to REMOVAL [04/2013 - ]
Air flow control: Insufficient air flow	Blower motor circuit	Refer to Blower Motor Circuit [04/2013 - ]
Air flow control: Insufficient air flow	Air conditioning amplifier assembly	Refer to REMOVAL [04/2013 - ]
Temperature control: Cooling effectiveness is poor	Refrigerant shortage check using the Techstream	Refer to CHECK MODE PROCEDURE [04/2013 - ]
	Refrigerant volume
	Refrigerant pressure	Refer to ON-VEHICLE INSPECTION [04/2013 - ]
	Cooler expansion valve	Refer to DISASSEMBLY [04/2013 - ]
	Cooler compressor assembly*4	Refer to REMOVAL [04/2013 - ]
	Cooler compressor assembly*5	Refer to REMOVAL [04/2013 - ]
	Air conditioning amplifier assembly	Refer to REMOVAL [04/2013 - ]
Temperature control: No cool air comes out	Refrigerant shortage check using the Techstream	Refer to CHECK MODE PROCEDURE [04/2013 - ]
	Refrigerant volume
	Refrigerant pressure	Refer to ON-VEHICLE INSPECTION [04/2013 - ]
	Air conditioner pressure sensor circuit	Refer to DTC B1423/23: Pressure Sensor Circuit [04/2013 - ]
	LIN communication circuit	Refer to DTC B14B2: Lost Communication with Front Panel LIN [04/2013 - ]
	Air mix damper control servo motor circuit (for driver upper layer side)	Refer to DTC B1446/46: Air Mix Damper Control Servo Motor Circuit (Driver Side) [04/2013 - ]
	Air mix damper control servo motor circuit (for front passenger upper layer side)	Refer to DTC B1441/41: Air Mix Damper Control Servo Motor Circuit (Passenger Side) [04/2013 - ]
	Air mix damper control servo motor circuit (for driver lower layer side)	Refer to DTC B1453/53: Driver Side Air Outlet Damper COOL Control Servo Motor Circuit [04/2013 - ]
	Air mix damper control servo motor circuit (for front passenger lower layer side)	Refer to DTC B1454/54: Passenger Side Air Outlet Damper COOL Control Servo Motor Circuit [04/2013 - ]
	Evaporator temperature sensor circuit	Refer to DTC B1413/13: Evaporator Temperature Sensor Circuit [04/2013 - ]
	Room temperature sensor circuit	Refer to DTC B1411/11: Room Temperature Sensor Circuit [04/2013 - ]
	Ambient temperature sensor circuit	Refer to DTC B1412/12: Ambient Temperature Sensor Circuit [04/2013 - ]
	Cooler expansion valve	Refer to DISASSEMBLY [04/2013 - ]
	No. 2 air conditioning radiator damper servo sub-assembly (Driver side upper air mix)	Refer to DISASSEMBLY [04/2013 - ]
	No. 2 air conditioning radiator damper servo sub-assembly (Front passenger side upper air mix)	Refer to DISASSEMBLY [04/2013 - ]
	No. 5 air conditioning radiator damper servo sub-assembly (Driver side lower air mix)	Refer to DISASSEMBLY [04/2013 - ]
	No. 4 air conditioning radiator damper servo sub-assembly (Front passenger side lower air mix)	Refer to DISASSEMBLY [04/2013 - ]
	Air conditioning harness assembly	Refer to DISASSEMBLY [04/2013 - ]
	Cooler compressor assembly*4	Refer to REMOVAL [04/2013 - ]
	Cooler compressor assembly*5	Refer to REMOVAL [04/2013 - ]
	Air conditioning amplifier assembly	Refer to REMOVAL [04/2013 - ]
	ECM*2	Refer to REMOVAL [04/2013 - ]
	ECM*3	Refer to REMOVAL [04/2013 - ]
Temperature control: No warm air comes out	LIN communication circuit	Refer to DTC B14B2: Lost Communication with Front Panel LIN [04/2013 - ]
	Air mix damper control servo motor circuit (for driver upper layer side)	Refer to DTC B1446/46: Air Mix Damper Control Servo Motor Circuit (Driver Side) [04/2013 - ]
	Air mix damper control servo motor circuit (for front passenger upper layer side)	Refer to DTC B1441/41: Air Mix Damper Control Servo Motor Circuit (Passenger Side) [04/2013 - ]
	Air mix damper control servo motor circuit (for driver lower layer side)	Refer to DTC B1453/53: Driver Side Air Outlet Damper COOL Control Servo Motor Circuit [04/2013 - ]
	Air mix damper control servo motor circuit (for front passenger lower layer side)	Refer to DTC B1454/54: Passenger Side Air Outlet Damper COOL Control Servo Motor Circuit [04/2013 - ]
	Evaporator temperature sensor circuit	Refer to DTC B1413/13: Evaporator Temperature Sensor Circuit [04/2013 - ]
	Room temperature sensor circuit	Refer to DTC B1411/11: Room Temperature Sensor Circuit [04/2013 - ]
	Ambient temperature sensor circuit	Refer to DTC B1412/12: Ambient Temperature Sensor Circuit [04/2013 - ]
	PTC heater circuit*1	Refer to PTC Heater Circuit [04/2013 - ]
	No. 2 air conditioning radiator damper servo sub-assembly (Driver side upper air mix)	Refer to DISASSEMBLY [04/2013 - ]
	No. 2 air conditioning radiator damper servo sub-assembly (Front passenger side upper air mix)	Refer to DISASSEMBLY [04/2013 - ]
	No. 5 air conditioning radiator damper servo sub-assembly (Driver side lower air mix)	Refer to DISASSEMBLY [04/2013 - ]
	No. 4 air conditioning radiator damper servo sub-assembly (Front passenger side lower air mix)	Refer to DISASSEMBLY [04/2013 - ]
	Air conditioning harness assembly	Refer to DISASSEMBLY [04/2013 - ]
	Air conditioning amplifier assembly	Refer to REMOVAL [04/2013 - ]
	ECM*2	Refer to REMOVAL [04/2013 - ]
	ECM*3	Refer to REMOVAL [04/2013 - ]
Temperature control: Output air is warmer or cooler than the set temperature or response is slow	Refrigerant shortage check using the Techstream	Refer to CHECK MODE PROCEDURE [04/2013 - ]
	Refrigerant volume
	Refrigerant pressure	Refer to ON-VEHICLE INSPECTION [04/2013 - ]
	Compressor solenoid circuit	Refer to DTC B1451/51: Compressor Solenoid Circuit [04/2013 - ]
	Automatic light control sensor	Refer to REMOVAL [04/2013 - ]
	Room temperature sensor circuit	Refer to DTC B1411/11: Room Temperature Sensor Circuit [04/2013 - ]
	Ambient temperature sensor circuit	Refer to DTC B1412/12: Ambient Temperature Sensor Circuit [04/2013 - ]
	LIN communication circuit	Refer to DTC B14B2: Lost Communication with Front Panel LIN [04/2013 - ]
	Air mix damper control servo motor circuit (for driver upper layer side)	Refer to DTC B1446/46: Air Mix Damper Control Servo Motor Circuit (Driver Side) [04/2013 - ]
	Air mix damper control servo motor circuit (for front passenger upper layer side)	Refer to DTC B1441/41: Air Mix Damper Control Servo Motor Circuit (Passenger Side) [04/2013 - ]
	Air mix damper control servo motor circuit (for driver lower layer side)	Refer to DTC B1453/53: Driver Side Air Outlet Damper COOL Control Servo Motor Circuit [04/2013 - ]
	Air mix damper control servo motor circuit (for front passenger lower layer side)	Refer to DTC B1454/54: Passenger Side Air Outlet Damper COOL Control Servo Motor Circuit [04/2013 - ]
	Air inlet damper control servo motor circuit	Refer to DTC B1442/42: Air Inlet Damper Control Servo Motor Circuit [04/2013 - ]
	PTC heater circuit*1	Refer to PTC Heater Circuit [04/2013 - ]
	Heater radiator unit sub-assembly	Refer to DISASSEMBLY [04/2013 - ]
	Cooler expansion valve	Refer to ON-VEHICLE INSPECTION [04/2013 - ]
	No. 2 air conditioning radiator damper servo sub-assembly (Driver side upper air mix)	Refer to DISASSEMBLY [04/2013 - ]
	No. 2 air conditioning radiator damper servo sub-assembly (Front passenger side upper air mix)	Refer to DISASSEMBLY [04/2013 - ]
	No. 5 air conditioning radiator damper servo sub-assembly (Driver side lower air mix)	Refer to DISASSEMBLY [04/2013 - ]
	No. 4 air conditioning radiator damper servo sub-assembly (Front passenger side lower air mix)	Refer to DISASSEMBLY [04/2013 - ]
	No. 1 blower damper servo sub-assembly	Refer to DISASSEMBLY [04/2013 - ]
	Air conditioning harness assembly	Refer to DISASSEMBLY [04/2013 - ]
	Air conditioning amplifier assembly	Refer to REMOVAL [04/2013 - ]
	ECM*2	Refer to REMOVAL [04/2013 - ]
	ECM*3	Refer to REMOVAL [04/2013 - ]
Temperature control: No temperature control (only MAX COLD or MAX HOT)	LIN communication circuit	Refer to DTC B14B2: Lost Communication with Front Panel LIN [04/2013 - ]
	Air mix damper control servo motor circuit (for driver upper layer side)	Refer to DTC B1446/46: Air Mix Damper Control Servo Motor Circuit (Driver Side) [04/2013 - ]
	Air mix damper control servo motor circuit (for front passenger upper layer side)	Refer to DTC B1441/41: Air Mix Damper Control Servo Motor Circuit (Passenger Side) [04/2013 - ]
	Air mix damper control servo motor circuit (for driver lower layer side)	Refer to DTC B1453/53: Driver Side Air Outlet Damper COOL Control Servo Motor Circuit [04/2013 - ]
	Air mix damper control servo motor circuit (for front passenger lower layer side)	Refer to DTC B1454/54: Passenger Side Air Outlet Damper COOL Control Servo Motor Circuit [04/2013 - ]
	Room temperature sensor circuit	Refer to DTC B1411/11: Room Temperature Sensor Circuit [04/2013 - ]
	Ambient temperature sensor circuit	Refer to DTC B1412/12: Ambient Temperature Sensor Circuit [04/2013 - ]
	Evaporator temperature sensor circuit	Refer to DTC B1413/13: Evaporator Temperature Sensor Circuit [04/2013 - ]
	Automatic light control sensor	Refer to REMOVAL [04/2013 - ]
	No. 2 air conditioning radiator damper servo sub-assembly (Driver side upper air mix)	Refer to DISASSEMBLY [04/2013 - ]
	No. 2 air conditioning radiator damper servo sub-assembly (Front passenger side upper air mix)	Refer to DISASSEMBLY [04/2013 - ]
	No. 5 air conditioning radiator damper servo sub-assembly (Driver side lower air mix)	Refer to DISASSEMBLY [04/2013 - ]
	No. 4 air conditioning radiator damper servo sub-assembly (Front passenger side lower air mix)	Refer to DISASSEMBLY [04/2013 - ]
	Air conditioning harness assembly	Refer to DISASSEMBLY [04/2013 - ]
	Air conditioning amplifier assembly	Refer to REMOVAL [04/2013 - ]
Temperature control: Output air temperature is different between left and right registers (the set temperature is the same for both)	Refrigerant shortage check using the Techstream	Refer to CHECK MODE PROCEDURE [04/2013 - ]
	Refrigerant volume
	Refrigerant pressure	Refer to ON-VEHICLE INSPECTION [04/2013 - ]
	Air mix damper control servo motor circuit (for driver upper layer side)	Refer to DTC B1446/46: Air Mix Damper Control Servo Motor Circuit (Driver Side) [04/2013 - ]
	Air mix damper control servo motor circuit (for front passenger upper layer side)	Refer to DTC B1441/41: Air Mix Damper Control Servo Motor Circuit (Passenger Side) [04/2013 - ]
	Air mix damper control servo motor circuit (for driver lower layer side)	Refer to DTC B1453/53: Driver Side Air Outlet Damper COOL Control Servo Motor Circuit [04/2013 - ]
	Air mix damper control servo motor circuit (for front passenger lower layer side)	Refer to DTC B1454/54: Passenger Side Air Outlet Damper COOL Control Servo Motor Circuit [04/2013 - ]
	Automatic light control sensor	Refer to REMOVAL [04/2013 - ]
	No. 2 air conditioning radiator damper servo sub-assembly (Driver side upper air mix)	Refer to DISASSEMBLY [04/2013 - ]
	No. 2 air conditioning radiator damper servo sub-assembly (Front passenger side upper air mix)	Refer to DISASSEMBLY [04/2013 - ]
	No. 5 air conditioning radiator damper servo sub-assembly (Driver side lower air mix)	Refer to DISASSEMBLY [04/2013 - ]
	No. 4 air conditioning radiator damper servo sub-assembly (Front passenger side lower air mix)	Refer to DISASSEMBLY [04/2013 - ]
	Air conditioning harness assembly	Refer to DISASSEMBLY [04/2013 - ]
	Air conditioning amplifier assembly	Refer to REMOVAL [04/2013 - ]
No air inlet control	LIN communication circuit	Refer to DTC B14B2: Lost Communication with Front Panel LIN [04/2013 - ]
	Air inlet damper control servo motor circuit	Refer to DTC B1442/42: Air Inlet Damper Control Servo Motor Circuit [04/2013 - ]
	No. 1 blower damper servo sub-assembly	Refer to DISASSEMBLY [04/2013 - ]
	Air conditioning harness assembly	Refer to DISASSEMBLY [04/2013 - ]
	Air conditioning amplifier assembly	Refer to REMOVAL [04/2013 - ]
No air flow mode control	LIN communication circuit	Refer to DTC B14B2: Lost Communication with Front Panel LIN [04/2013 - ]
	Air outlet damper control servo motor circuit	Refer to DTC B1443/43: Air Outlet Damper Control Servo Motor Circuit [04/2013 - ]
	Driver side air outlet damper foot/def control servo motor circuit	Refer to DTC B1455/55: Driver Side Air Outlet Damper FOOT/DEF Control Servo Motor Circuit [04/2013 - ]
	No. 1 air conditioning radiator damper servo sub-assembly	Refer to DISASSEMBLY [04/2013 - ]
	No. 3 air conditioning radiator damper servo sub-assembly	Refer to DISASSEMBLY [04/2013 - ]
	Air conditioning harness assembly	Refer to DISASSEMBLY [04/2013 - ]
	Air conditioning amplifier assembly	Refer to REMOVAL [04/2013 - ]
Quick heater assembly does not operate*1	PTC heater circuit	Refer to PTC Heater Circuit [04/2013 - ]
Quick heater assembly does not operate*1	Air conditioning amplifier assembly	Refer to REMOVAL [04/2013 - ]
Combination switch assembly (ECO mode switch) does not operate normally	ECO switch circuit	Refer to ECO Switch Circuit [04/2013 - ]
	Air conditioning amplifier assembly	Refer to REMOVAL [04/2013 - ]
Diagnostic trouble codes (DTCs) are not recorded. Set mode is cleared when the engine switch is turned off.	Back-up power source circuit	Refer to Back-up Power Source Circuit [04/2013 - ]
	Air conditioning amplifier assembly	Refer to REMOVAL [04/2013 - ]

AIR CONDITIONING SYSTEM

*1: w/ PTC Heater
*2: for 2GR-FSE
*3: for 4GR-FSE
*4: for 2WD
*5: for AWD

Scheme 22

Scheme 22: TERMINALS OF ECU [04/2013 - ]

Scheme 23

Scheme 24

Scheme 25

Scheme 26

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 K10-1 (GND) - Body ground BR - Body ground Ground for main power supply Always Below 1 V K10-3 (BLW) - K10-1 (GND) BE - BR Blower motor speed control signal Engine switch on (IG) Blower switch: LO Pulse generation (See waveform 1) K10-4 (SOL+) - K10-1 (GND) P - BR Compressor solenoid operation signal Engine running Blower switch: LO A/C switch: on Pulse generation (See waveform 2) K10-5 (IG+) - K10-1 (GND) R - BR Power source (IG) Engine switch on (IG) 11 to 14 V Engine switch off Below 1 V K10-6 (+B1) - K10-1 (GND) L - BR Power source (Back-up) Always 11 to 14 V K10-8 (PTC1) - K10-1 (GND)*1 R - BR Quick heater assembly operation signal Engine running Combination switch assembly (ECO mode switch) off Temperature settings: MAX HOT Ambient temperature: 3°C (37°F) or lower Engine coolant temperature: 72°C (162°F) or lower Light control switch off Blower switch: on Below 1 V Engine running Combination switch assembly (ECO mode switch) off Temperature settings: MAX HOT Ambient temperature: 3°C (37°F) or lower Engine coolant temperature: 72°C (162°F) or lower Light control switch off Blower switch: off 11 to 14 V K10-18 (MGC) - K10-1 (GND) Y - BR Magnetic clutch operation signal Engine running Blower switch: LO A/C switch: off 11 to 14 V Engine running Blower switch: LO A/C switch: on Below 1 V K10-21 (RLIN) - K10-1 (GND) P - BR LIN communication signal Engine switch on (IG) Pulse generation K10-26 (PTC2) - K10-1 (GND)*1 L - BR Quick heater assembly operation signal Engine running Combination switch assembly (ECO mode switch) off Temperature settings: MAX HOT Ambient temperature: 3°C (37°F) or lower Engine coolant temperature: 69°C (156°F) or lower Light control switch off Blower switch: on Below 1 V Engine running Combination switch assembly (ECO mode switch) off Temperature settings: MAX HOT Ambient temperature: 3°C (37°F) or lower Engine coolant temperature: 69°C (156°F) or lower Light control switch off Blower switch: off 11 to 14 V K10-29 (ECOS) - K10-1 (GND) GR - BR Combination switch assembly (ECO mode switch) signal Engine switch on (IG) Combination switch assembly (ECO mode switch) off 11 to 14 V Engine switch on (IG) Combination switch assembly (ECO mode switch) on Below 1 V K11-1 (SG-1) - Body ground W - Body ground Ground for cooler (room temp. sensor) thermistor Always Below 1 V K11-3 (CANH) - K11-4 (CANL) P - B CAN communication system CAN communication is performed Pulse generation K11-9 (PRE) - K11-32 (SG-2) W - G Air conditioner pressure sensor signal Engine running Air conditioning system operating Refrigerant pressure: Abnormal pressure (more than 3025 kPa (30.8 kgf/cm 2 , 439 psi)) 4.71 V or higher Engine running Air conditioning system operating Refrigerant pressure: Abnormal pressure (less than 176 kPa (1.8 kgf/cm 2 , 26 psi)) Below 0.74 V Engine running Air conditioning 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)) 0.74 to 4.71 V K11-10 (TAM) - K11-32 (SG-2) V - G Thermistor assembly signal Engine switch on (IG) Ambient temperature: 25°C (77°F) 1.35 to 1.75 V Engine switch on (IG) Ambient temperature: 40°C (104°F) 0.9 to 1.2 V K11-13 (S5-3) - K11-32 (SG-2) B - G Power supply for air conditioner pressure sensor Engine switch on (IG) 4.75 to 5.25 V Engine switch off Below 1 V K11-16 (TR) - K11-1 (SG-1) B - W Cooler (room temp. sensor) thermistor signal Engine switch on (IG) Cabin temperature: 25°C (77°F) 1.8 to 2.2 V Engine switch on (IG) Cabin temperature: 40°C (104°F) 1.2 to 1.6 V K11-30 (LOCK) - K11-32 (SG-2) Y - G A/C lock sensor signal Engine running Blower switch: LO A/C switch: on Pulse generation (See waveform 3) K11-32 (SG-2) - Body ground G - Body ground Ground for air conditioner pressure sensor, thermistor assembly, A/C lock sensor Always Below 1 V z1-1 (BUS G) - Body ground - Ground for BUS IC Always Below 1 V z1-2 (BUS) - z1-1 (BUS G) - BUS IC control signal Engine switch on (IG) Pulse generation z1-3 (B BUS) - z1-1 (BUS G) - Power supply for BUS IC Always 11 to 14 V z1-11 (TEA) - z1-12 (SGA) - No. 1 cooler thermistor signal Engine switch on (IG) Evaporator temperature: 0°C (32°F) 2.0 to 2.4 V Engine switch on (IG) Evaporator temperature: 15°C (59°F) 1.4 to 1.8 V z1-12 (SGA) - Body ground - Ground for No. 1 cooler thermistor Always Below 1 V *1: w/ PTC Heater Waveform 1: Item Content Terminal No. K10-3 (BLW) - K10-1 (GND) Tool Setting 1 V/DIV., 500 μs/DIV. Vehicle Condition Engine switch on (IG) Blower switch: LO Waveform 2: Item Content Terminal No. K10-4 (SOL+) - K10-1 (GND) Tool Setting 5 V/DIV., 500 μs/DIV. Vehicle Condition Engine running Blower switch: LO A/C switch: on Waveform 3: Item Content Terminal No. K11-30 (LOCK) - K11-32 (SG-2) Tool Setting 200 mV/DIV., 10 ms/DIV. Vehicle Condition Engine running Blower switch: LO A/C switch: on
AIR CONDITIONING CONTROL ASSEMBLY HINT: Check from the rear of the connector while it is connected to the air conditioning control assembly. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition K65-6 (LIN1) - Body ground P - Body ground LIN communication signal Engine switch on (IG) Pulse generation K65-8 (IG+) - K65-14 (GND) P - W-B Power source (IG) Engine switch off Below 1 V Engine switch on (IG) 11 to 14 V K65-14 (GND) - Body ground W-B - Body ground Ground for air conditioning control assembly Always Below 1 V K65-15 (ILL-) - Body ground BE - Body ground Illumination signal Light control switch off Below 1 V Light control switch in tail or head position Pulse generation K65-16 (ILL+) - Body ground G - Body ground Illumination signal Light control switch off Below 1 V Light control switch in tail or head position 11 to 14 V

Scheme 27

Scheme 27: DIAGNOSIS SYSTEM [04/2013 - ]

Scheme 28

Scheme 29

Scheme 30

Scheme 31

Scheme 32

DESCRIPTION Air conditioning system data and 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.
CHECK DLC3 Check the DLC3. Refer to «GENERAL INFORMATION [04/2013 - ]»(ref-665529-S26412111322014102400000)
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.
INDICATOR CHECK Turn the engine switch off. Turn the engine switch on (IG) and press the air conditioning control assembly AUTO and recirculation/fresh switches simultaneously within 5 seconds. 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. *a Indicator Blinking Pattern *b ON *c OFF *d 1 Sec.
SENSOR CHECK (DTC CHECK) 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. *A w/ Navigation System *B w/ Audio and Visual System *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 Table for details of the codes. Refer to «DIAGNOSTIC TROUBLE CODE TABLE [04/2013 - ]»(ref-665545-S18628907692014102400000) 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, 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. Clear DTCs. During the sensor check, press the front defroster switch and rear defogger switch simultaneously.

DTC CHECK/CLEAR [04/2013 - ]

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. Body Electrical > Air Conditioner > Trouble Codes
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 DTCs. Body Electrical > Air Conditioner > Clear DTCs

Scheme 33

Scheme 33: CHECK MODE PROCEDURE [04/2013 - ]

REFRIGERANT SHORTAGE CHECK IN NORMAL OPERATION (CHECK A/C SWITCH INDICATOR AND DTC) 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 «DTC B14B8: Refrigerant Shortage [04/2013 - ]»(ref-665827-S30128655832014102400000) DTC B14B8 is not output Correct or insufficient Perform a refrigerant shortage check using the Techstream. Refer to «REPLACEMENT [04/2013 - ]»(ref-665718-S29281733902014102400000)
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 Gas Volume Check. Body Electrical > Air Conditioner > Utility Tester Display Refrigerant Gas Volume 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) Blower speed HI *: 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. Evacuate the air conditioning system and charge it with the appropriate volume of new or purified refrigerant. Refer to «REPLACEMENT [04/2013 - ]»(ref-665718-S29281733902014102400000) Refrigerant correct Correct

DATA LIST/ACTIVE TEST [04/2013 - ]

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. Body Electrical > Air Conditioner > Data List Tester Display Measurement Item Range Normal Condition Diagnostic Note Room Temperature Sensor Cooler (room temp. sensor) 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 - 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 - Regulator Pressure Sensor Air conditioner pressure sensor Min.: -66.22 psi (gauge) Max.: 477.68 psi (gauge) Actual refrigerant pressure 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 (driver side upper air mix) target pulse Min.: 128 Max.: 383 MAX. COLD: 254 (pulse) MAX. HOT: 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: 254 (pulse) MAX. HOT: 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: 258 (pulse) MAX. HOT: 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: 258 (pulse) MAX. HOT: 152 (pulse) - Air Outlet Servo Pulse (D) No. 3 air conditioning radiator damper servo sub-assembly target pulse Min.: 128 Max.: 383 FACE1: 245 (pulse) FACE2: 254 (pulse) FACE: 230 (pulse) B/L: 217 (pulse) B/L2: 209 (pulse) FOOT-D: 199 (pulse) FOOT-R: 199 (pulse) FOOT-F (manual mode): 199 (pulse) FOOT-F (automatic mode): 183 (pulse) FOOT/DEF: 168 (pulse) DEF: 140 (pulse) - Air Outlet Servo Actu Pulse(D) No. 3 air conditioning radiator damper servo sub-assembly actual pulse Min.: 128 Max.: 383 FACE1: 245 (pulse) FACE2: 254 (pulse) FACE: 230 (pulse) B/L: 217 (pulse) B/L2: 209 (pulse) FOOT-D: 199 (pulse) FOOT-R: 199 (pulse) FOOT-F (manual mode): 199 (pulse) FOOT-F (automatic mode): 183 (pulse) FOOT/DEF: 168 (pulse) DEF: 140 (pulse) - Air Inlet Damper Targ Pulse No. 1 blower damper servo sub-assembly target pulse Min.: 128 Max.: 383 Recirculation: 238 (pulse) Fresh: 206 (pulse) - Air Inlet Damper Actual Pulse No. 1 blower damper servo sub-assembly actual pulse Min.: 128 Max.: 383 Recirculation: 238 (pulse) Fresh: 206 (pulse) - Electric Heater Count Maximum electric heater operation level Min.: 0 Max.: 2 Maximum possible operation of electric heater displayed *1 Electric Heater Active Level Actual electric heater operation level Min.: 0 Max.: 2 Actual operation level of electric heater displayed *1 Shift Set Temperature Shift set temperature 2C decr, 1C decr, Normal, 1C incr, 2C incr Customized value displayed - Compressor Mode Compressor mode Auto or Manual Customized value displayed - Evaporator Control Evaporator control Auto or Manual Customized value displayed - Add Foot Air in FACE Mode Add foot air in face mode ON or OFF Customized value displayed - ECO MODE Cancel ECO drive mode cancel OFF or ON Customized value displayed - ECO Switch Combination switch assembly (ECO mode switch) OFF or ON ON: Combination switch assembly (ECO mode switch) being turned and held at ECO position OFF: Combination switch assembly (ECO mode switch) 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/defroster auto mode ON or OFF Customized value displayed - Foot/DEF Auto Blow Up Foot/defroster 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. 5 air conditioning radiator damper servo sub-assembly (driver side lower air mix) target pulse Min.: 128 Max.: 383 MAX. COLD: 254 (pulse) MAX. HOT: 360 (pulse) - COOL A/M Servo Actual Pulse(D) No. 5 air conditioning radiator damper servo sub-assembly (driver side lower air mix) actual pulse Min.: 128 Max.: 383 MAX. COLD: 254 (pulse) MAX. HOT: 360 (pulse) - COOL A/M Servo Targ Pls(P) No. 4 air conditioning radiator damper servo sub-assembly (front passenger side lower air mix) target pulse Min.: 128 Max.: 383 MAX. COLD: 254 (pulse) MAX. HOT: 360 (pulse) - COOL A/M Servo Actual Pulse(P) No. 4 air conditioning radiator damper servo sub-assembly (front passenger side lower air mix) actual pulse Min.: 128 Max.: 383 MAX. COLD: 254 (pulse) MAX. HOT: 360 (pulse) - 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-D: 230 (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-D: 230 (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/C Cutoff Signal A/C control cutoff signal OFF or ON A/C switch on: OFF A/C switch off: ON - 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 - Operation Limitation Control History Count (Level1) History of battery voltage drop in the past Min.: 0 Max.: 255 Number of times battery voltage dropped in the past displayed Counted when voltage drops below the specified level due to over discharge while driving. HINT: Clear control history after check Operation Limitation Control History Count (Level2) History of battery voltage drop in the past Min.: 0 Max.: 255 Number of times battery voltage dropped in the past displayed Counted if voltage drops from the level when Operation Limitation Control History Count (Level1) is counted. HINT: Clear control history after check Number of Trouble Codes Number of trouble codes Min.: 0 Max.: 255 Number of DTCs displayed - *1: w/ PTC Heater
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. Body Electrical > Air Conditioner > Active Test Tester Display Measurement Item Control Range Diagnostic Note Blower Motor Blower motor with fan sub-assembly Min.: 0, Max.: 31 - Magnetic Clutch Relay Air conditioning system operation OFF, ON - Defogger Relay (Rear) Rear window defogger OFF, ON - Deicer Relay (Front) Windshield deicer OFF, ON *2 Heater Active Level Quick heater assembly Min.: 0, Max.: 2 *1 Air Mix Servo Targ Pulse(D) No. 2 air conditioning radiator damper servo sub-assembly (driver side upper air mix) pulse Min.: 128 Max.: 383 Operates between 254 to 360 pulses Air Mix Servo Targ Pulse(P) No. 2 air conditioning radiator damper servo sub-assembly (front passenger side upper air mix) pulse Min.: 128 Max.: 383 Operates between 152 to 258 pulses Air Outlet Servo Pulse (D) No. 3 air conditioning radiator damper servo sub-assembly pulse Min.: 128 Max.: 383 Operates between 140 to 254 pulses Air Inlet Damper Targ Pulse No. 1 blower damper servo sub-assembly pulse Min.: 128 Max.: 383 Operates between 206 to 238 pulses Cool A/M Servo Pulse(D) No. 5 air conditioning radiator damper servo sub-assembly (driver side lower air mix) pulse Min.: 128 Max.: 383 Operates between 254 to 360 pulses Cool A/M Servo Pulse(P) No. 4 air conditioning radiator damper servo sub-assembly (front passenger side lower air mix) pulse 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 pulse Min.: 128 Max.: 383 Operates between 164 to 270 pulses *1: w/ PTC Heater *2: w/ Windshield Deicer System

DIAGNOSTIC TROUBLE CODE TABLE [04/2013 - ]