HOW TO PROCEED WITH TROUBLESHOOTING
HINT
- Use these procedures to troubleshoot the air conditioning system.
- *: Use the Techstream.
- VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
- INSPECT BATTERY VOLTAGE Standard voltage 11 to 14 V If the voltage is below 11 V, recharge or replace the battery before proceeding. NEXT: Go to next step
- CHECK COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)* Use the Techstream to check if the Multiplex Communication System (MPX) is functioning normally. RESULT Result Proceed to MPX DTC is not output A MPX DTC is output B. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-386979-S20279454612011022400000) B --> GO TO THE APPROPRIATE MULTIPLEX COMMUNICATION SERVICE INFORMATION A: Go to next step
- 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 DTC is not output A CAN DTC is output B. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-387091-S07682503522011022400000) B --> GO TO THE APPROPRIATE CAN COMMUNICATION SERVICE INFORMATION A: Go to next step
- CHECK FOR DTC* Check for DTCs and note any codes that are output. Delete the DTC. Recheck for DTCs. Based on the DTCs output above, try to force output of the A/C system DTC by simulating the operation indicated by the DTC. RESULT Result Proceed to DTC is not output A DTC is output B B --> GO TO STEP 8 A: Go to next step
- PROBLEM SYMPTOMS TABLE Refer to the problem symptoms table. Refer to «PROBLEM SYMPTOMS TABLE»(ref-387145-S36094178262011022400000) . 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
- OVERALL ANALYSIS AND TROUBLESHOOTING* Actuator Check. Refer to «ACTUATOR CHECK»(ref-387146-S26559319572011022400000) DATA LIST / ACTIVE TEST. Refer to «DATA LIST / ACTIVE TEST»(ref-387145-S07744598952011022400000) Terminals of ECU. Refer to «TERMINALS OF ECU»(ref-387145-S39811419092011022400000) On-vehicle Inspection Inspection NEXT: Go to next step
- ADJUST, REPAIR OR REPLACE NEXT --> END
PROBLEM SYMPTOMS TABLE
HINT
- Use the table below to help determine the cause of the problem symptom. 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 | See |
|---|---|---|
| All functions of A/C system do not operate | 1. ECU-IG RH, A/C fuse | |
| 2. Wire harness or connector | ||
| 3. IG power source circuit | Refer to IG Power Source Circuit | |
| 4. Back-up power source circuit | Refer to IG Power Source Circuit | |
| 5. A/C amplifier | Refer to TERMINALS OF ECU | |
| Airflow Control: No blower operation | 1. Blower motor circuit | Refer to Blower Motor Circuit |
| 2. A/C amplifier | Refer to TERMINALS OF ECU | |
| Airflow Control: No blower control | 1. Blower motor circuit | Refer to Blower Motor Circuit |
| 2. Room temperature sensor circuit | Refer to DTC B1411/11: Room Temperature Sensor Circuit | |
| 3. Ambient temperature sensor circuit | Refer to DTC B1412/12: Ambient Temperature Sensor Circuit | |
| 4. Driver side solar sensor circuit | Refer to DTC B1424/24: Solar Sensor Circuit (Driver Side) | |
| 5. Passenger side solar sensor circuit | Refer to DTC B1421/21: Solar Sensor Circuit (Passenger Side) | |
| 6. A/C amplifier | Refer to TERMINALS OF ECU | |
| Airflow Control: Insufficient airflow | 1. Blower motor circuit | Refer to Blower Motor Circuit |
| 2. A/C amplifier | Refer to TERMINALS OF ECU | |
| Temperature Control: No cool air comes out | 1. Volume of refrigerant | |
| 2. Refrigerant pressure | Refer to ON-VEHICLE INSPECTION | |
| 3. Pressure sensor circuit | Refer to DTC B1423/23: Pressure Sensor Circuit | |
| 4. Blower motor circuit | Refer to Blower Motor Circuit | |
| 5. Driver side air mix damper control servo motor circuit | Refer to DTC B1446/46: Air Mix Damper Control Servo Motor Circuit (Driver Side) | |
| 6. Passenger side air mix damper control servo motor circuit | Refer to DTC B1441/41: Air Mix Damper Control Servo Motor Circuit (Passenger Side) | |
| 7. Room temperature sensor circuit | Refer to DTC B1411/11: Room Temperature Sensor Circuit | |
| 8. Room humidity sensor circuit | Refer to DTC B1462/62: Room Humidity Sensor Circuit | |
| 9. Ambient temperature sensor circuit | Refer to DTC B1412/12: Ambient Temperature Sensor Circuit | |
| 10. Evaporator temperature sensor circuit | Refer to DTC B1413/13: Evaporator Temperature Sensor Circuit | |
| 11. Cool air bypass damper control servo motor circuit | Refer to DTC B1445/45: Front Passenger Seat Side Cool Air Bypass Damper Control Servo Motor Circuit | |
| 12. Air conditioning harness | Refer to DTC B1497/97: BUS IC Communication Malfunction | |
| 13. Compressor assembly | Refer to DTC B1471/71: A/C Inverter High Voltage Power Resource System Malfunction | |
| 14. ECM | Refer to COMPONENTS | |
| 15. Hybrid vehicle control ECU | Refer to COMPONENTS | |
| 16. Multiplex communication circuit | Refer to DTC B1499/99: Multiplex Communication Circuit | |
| 17. CAN communication line | Refer to PROBLEM SYMPTOMS TABLE | |
| 18. A/C amplifier | Refer to TERMINALS OF ECU | |
| Temperature Control: No warm air comes out | 1. Driver side air mix damper control servo motor circuit | Refer to DTC B1446/46: Air Mix Damper Control Servo Motor Circuit (Driver Side) |
| 2. Passenger side air mix damper control servo motor circuit | Refer to DTC B1441/41: Air Mix Damper Control Servo Motor Circuit (Passenger Side) | |
| 3. Heater water pump circuit | Refer to Heater Water Pump Circuit | |
| 4. Room temperature sensor circuit | Refer to DTC B1411/11: Room Temperature Sensor Circuit | |
| 5. Room humidity sensor circuit | Refer to DTC B1462/62: Room Humidity Sensor Circuit | |
| 6. Ambient temperature sensor circuit | Refer to DTC B1412/12: Ambient Temperature Sensor Circuit | |
| 7. Evaporator temperature sensor circuit | Refer to DTC B1413/13: Evaporator Temperature Sensor Circuit | |
| 8. Air conditioning harness | Refer to DTC B1497/97: BUS IC Communication Malfunction | |
| 9. Compressor assembly | Refer to DTC B1471/71: A/C Inverter High Voltage Power Resource System Malfunction | |
| 10. Pressure sensor circuit | Refer to DTC B1423/23: Pressure Sensor Circuit | |
| 11. ECM | Refer to COMPONENTS | |
| 12. Multiplex communication circuit | Refer to DTC B1499/99: Multiplex Communication Circuit | |
| 13. CAN communication line | Refer to PROBLEM SYMPTOMS TABLE | |
| 14. A/C amplifier | Refer to TERMINALS OF ECU | |
| Temperature Control: Output air is warmer or cooler than the set temperature or response is slow | 1. Volume of refrigerant | |
| 2. Refrigerant pressure | Refer to ON-VEHICLE INSPECTION | |
| 3. Driver side air mix damper control servo motor circuit | Refer to DTC B1446/46: Air Mix Damper Control Servo Motor Circuit (Driver Side) | |
| 4. Passenger side air mix damper control servo motor circuit | Refer to DTC B1441/41: Air Mix Damper Control Servo Motor Circuit (Passenger Side) | |
| 5. Room temperature sensor circuit | Refer to DTC B1411/11: Room Temperature Sensor Circuit | |
| 6. Room humidity sensor circuit | Refer to DTC B1462/62: Room Humidity Sensor Circuit | |
| 7. Ambient temperature sensor circuit | Refer to DTC B1412/12: Ambient Temperature Sensor Circuit | |
| 8. Driver side solar sensor circuit | Refer to DTC B1424/24: Solar Sensor Circuit (Driver Side) | |
| 9. Passenger side solar sensor circuit | Refer to DTC B1421/21: Solar Sensor Circuit (Passenger Side) | |
| 10. Evaporator temperature sensor circuit | Refer to DTC B1413/13: Evaporator Temperature Sensor Circuit | |
| 11. Cool air bypass damper control servo motor circuit | Refer to DTC B1445/45: Front Passenger Seat Side Cool Air Bypass Damper Control Servo Motor Circuit | |
| 12. Air conditioning harness | Refer to DTC B1497/97: BUS IC Communication Malfunction | |
| 13. ECM | Refer to COMPONENTS | |
| 14. Multiplex communication circuit | Refer to DTC B1499/99: Multiplex Communication Circuit | |
| 15. CAN communication line | Refer to PROBLEM SYMPTOMS TABLE | |
| 16. A/C amplifier | Refer to TERMINALS OF ECU | |
| Temperature Control: No temperature control (only Max. cool or Max. warm) | 1. Driver side air mix damper control servo motor circuit | Refer to DTC B1446/46: Air Mix Damper Control Servo Motor Circuit (Driver Side) |
| 2. Passenger side air mix damper control servo motor circuit | Refer to DTC B1441/41: Air Mix Damper Control Servo Motor Circuit (Passenger Side) | |
| 3. Room temperature sensor circuit | Refer to DTC B1411/11: Room Temperature Sensor Circuit | |
| 4. Room humidity sensor circuit | Refer to DTC B1462/62: Room Humidity Sensor Circuit | |
| 5. Cool air bypass damper control servo motor circuit | Refer to DTC B1445/45: Front Passenger Seat Side Cool Air Bypass Damper Control Servo Motor Circuit | |
| 6. Evaporator temperature sensor circuit | Refer to DTC B1413/13: Evaporator Temperature Sensor Circuit | |
| 7. Driver side solar sensor circuit | Refer to DTC B1424/24: Solar Sensor Circuit (Driver Side) | |
| 8. Passenger side solar sensor circuit | Refer to DTC B1421/21: Solar Sensor Circuit (Passenger Side) | |
| 9. Multiplex communication circuit | Refer to DTC B1499/99: Multiplex Communication Circuit | |
| 10. A/C amplifier | Refer to TERMINALS OF ECU | |
| No air inlet control | 1. Air inlet damper control servo motor circuit | Refer to DTC B1443/43: Air Outlet Damper Control Servo Motor Circuit |
| 2. Air conditioning harness | Refer to DTC B1497/97: BUS IC Communication Malfunction | |
| No air outlet control | 1. Air outlet damper control servo motor circuit | Refer to DTC B1443/43: Air Outlet Damper Control Servo Motor Circuit |
| 2. A/C amplifier | Refer to TERMINALS OF ECU | |
| Engine idle does not occur, or is continuous | 1. Multiplex communication circuit | Refer to DTC B1499/99: Multiplex Communication Circuit |
| 2. A/C amplifier | Refer to TERMINALS OF ECU | |
| Unable to control A/C with the multi-display | 1. Multiplex communication circuit | Refer to DTC B1499/99: Multiplex Communication Circuit |
| 2. Multi-display (w/ Navigation system) | Refer to COMPONENTS | |
| 3. Integration control and panel (w/o Navigation system) | ||
| 4. A/C amplifier | Refer to TERMINALS OF ECU | |
| Diagnostic trouble codes are not recorded. Set mode cleared when power switch turned OFF. | 1. Back-up power source circuit | Refer to Back-up Power Source Circuit |
| 2. A/C amplifier | Refer to TERMINALS OF ECU |
AIR CONDITIONING SYSTEM
Scheme 151
Scheme 152
- CHECK AIR CONDITIONING AMPLIFIER HINT: Check from the rear of the connector while it is connected to the A/C amplifier. Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition B (K52-1) - Body ground L - Body ground Power source (Back-up) Always 10 to 14 V S5-1 (K52-7) - SG-1 (K52-19) P - B Power supply for room temperature sensor Power switch: OFF Below 1.0 V Power switch: ON (IG) 5 V BLW (K52-11) - GND (K52-20) G - W-B Blower motor control signal Power switch: ON (IG) Blower switch: OFF --> ON Pulse generation ( see scheme 14waveform 1) PRE (K52-13) - SG-2 (K52-38) W - V Pressure sensor signal Start engine, operate A/C system Refrigerant pressure: Abnormal pressure (more than 3,030 kPa (31.0 kgf/cm 2, 440 psi)) 4.7 V or higher PRE (K52-13) - SG-2 (K52-38) W - V Pressure sensor signal Start engine, operate A/C system Refrigerant pressure: Abnormal pressure (less than 180 kPa (1.9 kgf/cm 2, 27 psi)) Below 0.7 V PRE (K52-13) - SG-2 (K52-38) W - V Pressure sensor signal Start engine, operate A/C system Refrigerant pressure: Abnormal pressure (more than 3,030 kPa (31.0 kgf/cm 2, 440 psi) and more than 180 kPa (1.9 kgf/cm 2, 27 psi)) 0.7 to 4.7 V TSP (K52-14) - GND (K52-20) P - W-B Passenger side solar sensor signal Power switch: ON (IG) Solar sensor subject to electric light 0.8 to 4.3 V RH (K52-15) - SG-1 (K52-19) SB - B Humidity sensor signal Power switch ON (IG), vehicle interior temperature 25°C (77°F), vehicle interior humidity 40 to 60% 40%: 1.61 to 2.24 V 60%: 2.26 to 2.66 V TR (K52-16) - SG-1 (K52-19) BR - B Room temperature sensor signal Power switch ON (IG), vehicle interior temperature 25°C (77°F) 1.8 to 2.2 V SG-1 (K52-19) - Body ground B - Body ground Ground for room temperature sensor (built-in humidity sensor) Always Below 1.0 ohms GND (K52-20) - Body ground W-B - Body ground Ground for main power supply Always Below 1.0 ohms IG+ (K52-21) - Body ground W - Body ground Power source (IG) Power switch: OFF or ON (ACC) Below 1.0 V Power switch: ON (IG) 10 to 14 V S5-2 (K52-26) - SG-2 (K52-38) Y - V Power supply for pressure sensor Power switch: ON (IG) A/C switch: OFF Below 1.0 V Power switch: ON (IG) A/C switch: ON 5 V MPX+ (K52-30) - GND (K52-20) SB - W-B Multiplex communication system Engine idling after engine warmed up Pulse generation MPX- (K52-31) - GND (K52-20) Y - W-B Multiplex communication system Engine idling after engine warmed up Pulse generation DGS1 (K52-33) - SG-6 (K52-39) R - GR Exhaust gas sensor signal (NOx) After 30 seconds from power switch ON (IG) and sensor is exposed to exhaust gas 1.0 to 4.5 V DGS (K52-34) - SG-6 (K52-39) L - GR Exhaust gas sensor signal (HC, CO) After 30 seconds from power switch ON (IG) and sensor is exposed to exhaust gas 1.0 to 4.5 V TSD (K52-35) - GND (K52-20) LG - W-B Driver side solar sensor signal Power switch: ON (IG) Solar sensor subject to electric light 0.8 to 4.3 V SG-2 (K52-38) - Body ground V - Body ground Ground for pressure sensor Always Below 1.0 ohms SG-6 (K52-39) - Body ground GR - Body ground Ground for exhaust gas sensor Always Below 1.0 ohms BUSG (z1-2) - Body ground - Ground for BUS IC Always Below 1.0 ohms BUS (z1-3) - BUSG (z1-2) - BUS IC control signal Power switch: OFF --> ON (IG) Pulse generation BBUS (z1-4) - BUSG (z1-2) - Power supply for BUS IC Power switch: OFF Below 1.0 V Power switch: ON (IG) 10 to 14 V SG-10 (z1-5) - BUSG (z1-2) - Ground for evaporator temperature sensor Always Below 1.0 ohms TE (z1-6) - SG-10 (z1-5) - Evaporator temperature sensor signal Power switch ON (IG), temperature near evaporator is 15°C (59°F) 1.4 to 1.8 V Using an oscilloscope, check waveform 1. WAVEFORM 1 (REFERENCE): Item Contents Symbols (Terminal No.) BLW (K52-11) - GND (K52-20) Tool Setting 1 V/DIV., 500 μsec./DIV. Vehicle Condition Power switch: ON (IG) Blower switch: OFF --> ON HINT: When the blower level is increased, the duty ratio changes accordingly.
Scheme 153
- 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.
- CHECK DLC3 The vehicle's ECM uses the ISO 15765-4 for communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format. Symbols (Terminal No.) Terminal Description Condition Specified Condition SIL (7) - SG (5) Bus "+" line During transmission Pulse generation CG (4) - Body ground Chassis ground Always Below 1 ohms SG (5) - Body ground Signal ground Always Below 1 ohms BAT (16) - Body ground Battery positive Always 10 to 14 V CANH (6) - CANL (14) CAN bus line Power switch OFF* 54 to 69 ohms CANH (6) - CG (4) HIGH-level CAN bus line Power switch OFF* 200 ohms or higher CANH (6) - BAT (16) HIGH-level CAN bus line Power switch OFF* 6 kohms or higher CANL (14) - CG (4) LOW-level CAN bus line Power switch OFF* 200 ohms or higher CANL (14) - BAT (16) LOW-level CAN bus line Power switch OFF* 6 kohms or higher NOTE: *: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the power switch, any other switches or the doors. If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector. HINT: Connect the Techstream to the DLC3, turn the power switch ON (IG) and attempt to use the tester. If the display indicates that a communication error has occurred, there is a problem either with the vehicle or with the tester. If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle. If communication is still not possible when the tester is connected to another vehicle, the problem may be in the tester itself. Consult the Service Department listed in the tester's instruction manual.
Scheme 154
Scheme 155
- INDICATOR CHECK Press and hold the A/C control AUTO switch and Recirculation / Fresh switch simultaneously, and turn the power switch ON (IG). Continue holding the 2 switches until the panel diagnosis mode begins. Check that all indicators turn on and off 4 times in succession at 1 second intervals. HINT: After the indicator check is completed, the system enters the DTC mode automatically. Press the "OFF" switch to cancel the indicator check.
- 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 / Trouble Codes. Check for DTCs.
- 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 / Trouble Codes. Clear DTCs by pressing the YES button on the Techstream display.
Scheme 156
- LIST OF OPERATION METHODS By operating each of the A/C control switches as shown in the diagram below, it is possible to enter the diagnostic check mode.
DATA LIST / ACTIVE TEST
- READ DATA LIST Use 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. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: for Air Conditioner: Body Electrical / Air Conditioner / Data List. for Engine and ECT: Powertrain / Engine and ECT / 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 Temp) Room temperature sensor / Min.: -6.5°C (-20.3°F) Max.: 57.25°C (135.05°F) Actual room temperature is displayed Open in circuit: -6.5°C (-20.3°F) Short in circuit: 57.25°C (135.05°F) Ambient Temp Sensor (Ambi Temp Sens) Ambient temperature sensor / Min.: -23.3°C (-9.94°F) Max.: 65.95°C (150.71°F) Actual ambient temperature is displayed Open in circuit: -23.3°C (-9.94°F) Short in circuit: 65.95°C (150.71°F) Evaporator Temp Sensor (Evap Temp) Evaporator temperature sensor / Min.: -29.7°C (-21.46°F) Max.: 59.55°C (139.19°F) Actual evaporator temperature is displayed Open in circuit: -29.7°C (-21.46°F) Short in circuit: 59.55°C (139.19°F) Solar Sensor (D side) (Solar Sens-D) Driver side solar sensor / Min.: 0, Max.: 255 Driver side solar sensor voltage increases as brightness increases Open in circuit: 0 Short in circuit: 255 Solar Sensor (P side) (Solar Sens-P) Passenger side solar sensor / Min.: 0, Max.: 255 Passenger side solar sensor voltage increases as brightness increases Open in circuit: 0 Short in circuit: 255 Engine Coolant Temp (Coolant Temp) Engine coolant temperature / Min.: 1.3°C (34.34°F) Max.: 90.55°C (194.99°F) Actual engine coolant temperature is displayed while engine is warmed up - Set Temperature (D Side) (Set Temp-D) Driver side set temperature / Min.: 0, Max.: 255 Driver side actual set temperature is displayed - Set Temperature (P Side) (Set Temp-P) Passenger side set temperature / Min.: 0, Max.: 255 Passenger side actual set temperature is displayed - Estimated Temp (D Side) (Estimate Temp-D) Driver side estimated temperature / Min.: -358.4°C (-613.12°F) Max.: 358.4°C (677.12°F) Driver side actual estimated temperature is displayed - Estimated Temp (P Side) (Estimate Temp-P) Passenger side estimated temperature / Min.: -358.4°C (-613.12°F) Max.: 358.4°C (677.12°F) Passenger side actual estimated temperature is displayed - Hand Free Telephone (Hand Free Tel) Handsfree telephone / OFF or ON - - Blower Motor Speed Level (Blower Level) Blower motor speed level / Min.: 0 Max.: 31 Increases in range between 0 and 31 as blower motor speed increases - Adjusted Ambient Temp (Ambi Temp) Adjusted ambient temperature / Min.: -30.8°C (-23.44°F) Max.: 50.8°C (123.44°F) - - Emission Gas Sensor (Emiss Gas Sens) Emission gas / Min.: 0, Max.: 255 Increases as the gas amount increases - Shift Set Temperature (Set Temp Shift) Shift set temperature / +2 C, +1 C, NORMAL, -1 C, -2 C Customized value will be displayed - Air Inlet Mode (Air Inlet Mode) Air inlet mode / AUTO, MANUAL Customized value will be displayed - Compressor Mode (Compressor Mode) Compressor mode / AUTO, MANUAL Customized value will be displayed - Compressor/DEF Mode (Comprs/DEF Oper) Compressor / DEF mode / LINK, NORMAL Customized value will be displayed - Emission Gas Sensor Shift (Gas Sens Shift) Emission gas sensor shift / MU MORE, MORE, LI MORE, NORMAL, LI LESS, LESS, MU LESS Customized value will be displayed - Button Press Buzzer (Button Prs Buz) Button press buzzer / ON, OFF Customized value will be displayed - Foot Air Leak (Foot Air Leak) Foot air leak / ON, OFF Customized value will be displayed - Foot/DEF Auto Blow Up (Auto Blow Up) Foot / DEF auto blower up function / ON, OFF Customized value will be displayed - Foot/DEF Auto Mode (Foot/DEF Mode) Foot / DEF auto mode / ON, OFF Customized value will be displayed - Ambient Temperature Shift (Ambient Tmp Sft) Ambient temperature shift / +3 C, +2 C, +1 C, Normal, -1 C, -2 C, -3 C Customized value will be displayed - Destination (Destination) Destination / DOMEST, USA, EUROPE, AUSTRAL, MIDEAST, NO INFO Changes value with destinations - Emission Gas Nox Sensor (Nox Gas Sens) Emission gas NOx sensor / Min.: 0, Max.: 255 Increases as gas amount increases - Regulator Pressure Sensor (Reg Press Sens) Refrigerant pressure sensor / Min.: -0.45668 MPaG, Max.: 3.29437 MPaG Actual refrigerant pressure is displayed - Humidity Sensor (Humidity Sens) Humidity sensor / Min.: 0%, Max.: 100% Actual room humidity is displayed - Air Mix Servo Targ Pulse(D) (Air Mix Pulse-D) Driver side air mix servo motor target pulse / Min.: 0, Max.: 255 Customized value will be displayed - Air Mix Servo Targ Pulse(P) (Air Mix Pulse-D) Passenger side air mix servo motor target pulse / Min.: 0, Max.: 255 Customized value will be displayed - Air Outlet Servo Pulse (D) (Air Out Pulse-D) Driver side air outlet servo motor target pulse / Min.: 0, Max.: 255 Customized value will be displayed - Air Inlet Damper Targ Pulse (A/I Damp Targ Pls) Air inlet damper target pulse / Min.: 0, Max.: 255 Customized value will be displayed - Cool Air Bypass Pulse (A/B Damp Pls) Passenger side cool air bypass pulse / Min.: 0, Max.: 255 Customized value will be displayed - Compressor Speed (Comprs Spd) Compressor speed / Min.: 0, Max.: 65,535 rpm Displayed actual rotation speed in range between 0 rpm and 8,600 rpm - Compressor Target Speed (Comprs Targ Spd) Compressor target speed / Min.: 0, Max.: 65,535 rpm Displayed actual rotation speed in range between 0 rpm and 8,600 rpm - Number of Trouble Codes (#Codes) Number of trouble codes / Min.: 0, Max.: 255 Number of DTCs will be displayed - ENGINE AND ECT Tester Display Measurement Item/Range Normal Condition Diagnostic Note A/C Signal (A/C Signal) A/C signal / ON or OFF ON: A/C ON OFF: A/C OFF
- PERFORM ACTIVE TEST Use the Techstream to perform Active Tests allows the relay, actuator, and other items to operate 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 Test early in troubleshooting is one way to save diagnostic time. Data List information can be display while performing Active Test. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: for Air Conditioner: 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) Blower motor Min.: Level 0, Max.: Level 31 - Compressor Target Speed (Comprs Targ Spd) Electrical compressor Min.: 0, Max. 65,535 - Defogger Rly-R (Defogger Rly-R) Defogger relay (Rear) OFF, ON - Deicer Relay (Front) Deicer Rly-F) Deicer relay (Front) OFF, ON - Water Pump (Water Pump Rly) Water pump OFF, ON - Electrical Fan (Electrical Fan) Electrical fan OFF, ON - Air Mix Servo Targ Pulse(D) (Air Mix Pulse-D) Driver side air mix servo motor pulse Min.: 0, Max.: 255 - Air Mix Servo Targ Pulse(P) (Air Mix Servo Targ Pulse(P)) Passenger side air mix servo motor pulse Min.: 0, Max.: 255 - Air Outlet Servo Pulse (D) (Air Outlet Servo Pulse (D)) Driver side air outlet servo motor pulse Min.: 0, Max.: 255 - Air Inlet Damper Targ Pulse (A/I Damp Targ Pls) Air inlet damper target pulse Min.: 0, Max.: 255 - Cool Air Bypass Pulse (A/B Damp Pls) Cool air bypass pulse Min.: 0, Max.: 255
DIAGNOSTIC TROUBLE CODE CHART
HINT
When the air conditioning system functions properly, DTC B1400/00 is output.
| DTC Code | Detection Item | Trouble Area | Memory* | Diagnostic Note | See |
|---|---|---|---|---|---|
| B1411/11 | Room Temperature Sensor Circuit | Room temperature sensor - Wire harness between room temperature sensor and A/C amplifier - A/C amplifier | Memorized (8.5 min. or more) | If the room temperature is approx. -18.6°C (1.48°F) or lower, DTC B1411/11 may be output even though the system is normal. | Refer to DTC B1411/11: Room Temperature Sensor Circuit |
| B1412/12 | Ambient Temperature Sensor Circuit | Ambient temperature sensor - Wire harness between ambient temperature sensor and ECM - ECM - Multiplex communication circuit - A/C amplifier | Memorized (8.5 min. or more) | If ambient temperature is approx. -52.9°C (-63.22°F) or lower, a malfunction code may be output even through the system is normal. | Refer to DTC B1412/12: Ambient Temperature Sensor Circuit |
| B1413/13 | Evaporator Temperature Sensor Circuit | Air conditioning harness - Evaporator temperature sensor - A/C amplifier | Memorized (8.5 min. or more) | Refer to DTC B1413/13: Evaporator Temperature Sensor Circuit | |
| B1418/18 | Exhaust Gas Sensor Circuit | Exhaust gas sensor (smog ventilation sensor) - Wire harness between exhaust gas sensor (smog ventilation sensor) and A/C amplifier - A/C amplifier | Refer to DTC B1418/18: Exhaust Gas Sensor Circuit | ||
| B1421/21 | Solar Sensor Circuit (Passenger Side) | Solar sensor - Wire harness between solar sensor and A/C amplifier - Wire harness between solar sensor and main body ECU RH (cowl side junction block ECU RH) - A/C amplifier | Memorized (8.5 min. or more) (only when circuit is shorted) | If the check is performed in a dark place, DTC B1424/24 (solar sensor circuit abnormal) may be output. | Refer to DTC B1421/21: Solar Sensor Circuit (Passenger Side) |
| B1423/23 | Pressure Sensor Circuit | Pressure sensor - Wire harness between pressure sensor and A/C amplifier - Refrigerant pipe line - A/C amplifier | Refer to DTC B1423/23: Pressure Sensor Circuit | ||
| B1424/24 | Solar Sensor Circuit (Driver Side) | Solar sensor - Wire harness between solar sensor and A/C amplifier - Wire harness between solar sensor and main body ECU RH (cowl side junction block ECU RH) - A/C amplifier | Memorized (8.5 min. or more) (only when circuit is shorted) | If the check is performed in a dark place, DTC B1421/21 or B1424/24 (solar sensor circuit abnormal) may be output. | Refer to DTC B1424/24: Solar Sensor Circuit (Driver Side) |
| B1441/41 | Air Mix Damper Control Servo Motor Circuit (Passenger Side) | A/C amplifier - Air conditioning harness - Air inlet control servo motor | Memorized (30 sec.) | Refer to DTC B1441/41: Air Mix Damper Control Servo Motor Circuit (Passenger Side) | |
| B1442/42 | Air Inlet Damper Control Servo Motor Circuit | A/C amplifier - Air conditioning harness - Air inlet control servo motor | Memorized (30 sec.) | Refer to DTC B1442/42: Air Inlet Damper Control Servo Motor Circuit | |
| B1443/43 | Air Outlet Damper Control Servo Motor Circuit | A/C amplifier - Air conditioning harness - Air outlet control servo motor | Memorized (30 sec.) | Refer to DTC B1443/43: Air Outlet Damper Control Servo Motor Circuit | |
| B1445/45 | Front Passenger Seat Side Cool Air Bypass Damper Control Servo Motor Circuit | Cool air bypass damper control servo motor - Air conditioning harness - A/C amplifier | Memorized (30 sec.) | Refer to DTC B1445/45: Front Passenger Seat Side Cool Air Bypass Damper Control Servo Motor Circuit | |
| B1446/46 | Air Mix Damper Control Servo Motor Circuit (Driver Side) | A/C amplifier - Air conditioning harness - Air mix damper control servo motor | Memorized (30 sec.) | Refer to DTC B1446/46: Air Mix Damper Control Servo Motor Circuit (Driver Side) | |
| B1461/61 | Emission Gas NOx Sensor Circuit | Exhaust gas sensor (smog ventilation sensor) - Wire harness between exhaust gas sensor (smog ventilation sensor) and A/C amplifier - A/C amplifier | Refer to DTC B1461/61: Emission Gas NOx Sensor Circuit | ||
| B1462/62 | Room Humidity Sensor Circuit | Room humidity sensor (room temperature sensor) - Wire harness between room humidity sensor (room temperature sensor) and A/C amplifier - A/C amplifier | Refer to DTC B1462/62: Room Humidity Sensor Circuit | ||
| B1471/71 | A/C Inverter High Voltage Power Resource System Malfunction | Wire harness between compressor assembly and inverter assembly - Compressor assembly - Hybrid control system - Inverter assembly | Memorized | Refer to DTC B1471/71: A/C Inverter High Voltage Power Resource System Malfunction | |
| B1472/72 | A/C Inverter High Voltage Output System Malfunction | Compressor assembly | Memorized | Refer to DTC B1472/72: A/C Inverter High Voltage Output System Malfunction | |
| B1473/73 | A/C Inverter Start-up Signal System Malfunction | Wire harness between hybrid vehicle control ECU and compressor assembly - Compressor assembly - Hybrid control system | Refer to DTC B1473/73: A/C Inverter Start-up Signal System Malfunction | ||
| B1474/74 | A/C Inverter Malfunction | Compressor assembly | Memorized | Refer to DTC B1474/74: A/C Inverter Malfunction | |
| B1475/75 | A/C Inverter Cooling / Heating System Malfunction | Cooling fan system - Refrigerant volume - Compressor assembly | Memorized | Refer to DTC B1475/75: A/C Inverter Cooling / Heating System Malfunction | |
| B1476/76 | A/C Inverter Load System Malfunction | Refrigerant volume - Compressor assembly - Cooling fan system | Memorized | Refer to DTC B1476/76: A/C Inverter Load System Malfunction | |
| B1477/77 | A/C Inverter Low Voltage Power Resource System Malfunction | Compressor assembly | Memorized | Refer to DTC B1477/77: A/C Inverter Low Voltage Power Resource System Malfunction | |
| B1497/97 | BUS IC Communication Malfunction | Wire harness - A/C amplifier | Memorized (10 sec. or more) | Refer to DTC B1497/97: BUS IC Communication Malfunction | |
| B1498/98 | Communication Malfunction (A/C Inverter Local) | Wire harness between hybrid vehicle control ECU and compressor assembly and body ground - Hybrid vehicle control ECU - Compressor assembly - Inverter assembly - Air conditioning harness | Memorized | Refer to DTC B1498/98: Communication Malfunction (A/C Inverter Local) | |
| B1499/99 | Multiplex Communication Circuit | Air conditioning amplifier - ECM - Combination meter - CAN communication line | Memorized | Refer to DTC B1499/99: Multiplex Communication Circuit | |
| P0AA6-611 | Hybrid Battery Voltage System Isolation Fault | Compressor oil - Compressor assembly | Refer to DTC P0AA6-611: Hybrid Battery Voltage System Isolation Fault |
AIR CONDITIONING SYSTEM
HINT
*: The A/C amplifier memorizes the DTC of the respective malfunction that has occurred for a period of the time indicated in the brackets.