Problem Symptoms Table
- 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.
- The electrical equipment operation may be limited by the load control of electric power control system. Follow the HOW TO PROCEED WITH TROUBLESHOOTING procedures.
Air Conditioning System
AIR CONDITIONER SYSTEM - PROBLEM SYMPTOM CHART
| Symptom | Suspected Area | Refer To |
|---|---|---|
| All functions of A/C system do not operate | P-IG1-1, E/G RM-IG1-2, A/C fuse | - |
| Wire harness or connector | - | |
| IG power source circuit | IG POWER SOURCE CIRCUIT | |
| Back-up power source circuit | BACK-UP POWER SOURCE CIRCUIT | |
| Multi-display | TERMINALS OF ECU | |
| Integration control and panel* | TERMINALS OF ECU | |
| Air conditioning amplifier | TERMINALS OF ECU | |
| Air Flow Control: No blower operation | Blower motor circuit | BLOWER MOTOR CIRCUIT |
| Air conditioning amplifier | TERMINALS OF ECU | |
| Air Flow Control: Insufficient air flow | Blower motor circuit | BLOWER MOTOR CIRCUIT |
| Air conditioning amplifier | TERMINALS OF ECU | |
| Temperature Control: No cool air comes out | Volume of refrigerant | REFRIGERANT |
| Refrigerant pressure | REFRIGERANT | |
| Compressor and pulley | COMPRESSOR AND MAGNETIC CLUTCH | |
| Pressure sensor circuit | DTC B1423/23 PRESSURE SENSOR CIRCUIT | |
| Compressor solenoid circuit | DTC B1451/51 COMPRESSOR SOLENOID CIRCUIT | |
| Air mix servo motor (for Driver side COOL) | DTC B1453/53 DRIVER SIDE AIR OUTLET DAMPER COOL CONTROL SERVO MOTOR CIRCUIT | |
| Air mix servo motor (for Passenger side COOL) | DTC B1454/54 PASSENGER SIDE AIR OUTLET DAMPER COOL CONTROL SERVO MOTOR CIRCUIT | |
| Air mix servo motor (for Driver side front A/C rear air flow) | DTC B1457/57 DRIVER SIDE AIR OUTLET DAMPER CONTROL SERVO MOTOR CIRCUIT | |
| Air mix servo motor (for Passenger side front A/C rear air flow) | DTC B1458/58 PASSENGER SIDE AIR OUTLET DAMPER CONTROL SERVO MOTOR CIRCUIT | |
| Room temperature sensor circuit | DTC B1411/11 ROOM TEMPERATURE SENSOR CIRCUIT | |
| Rear room temperature sensor circuit | DTC B1419/19 REAR ROOM TEMPERATURE SENSOR CIRCUIT | |
| Solar sensor circuit (for Passenger side) | DTC B1421/21 SOLAR SENSOR CIRCUIT (PASSENGER SIDE) | |
| Solar sensor circuit (for Driver side) | DTC B1424/24 SOLAR SENSOR CIRCUIT (DRIVER SIDE) | |
| Rear solar sensor circuit | DTC B1428/28 REAR SOLAR SENSOR CIRCUIT | |
| Ambient temperature sensor circuit | DTC B1412/12 AMBIENT TEMPERATURE SENSOR CIRCUIT | |
| Evaporator temperature sensor circuit | DTC B1413/13 EVAPORATOR TEMPERATURE SENSOR CIRCUIT | |
| Cooler expansion valve | - | |
| Air conditioning harness | DTC B1497/97 BUS IC COMMUNICATION MALFUNCTION | |
| Air conditioning amplifier | TERMINALS OF ECU | |
| Front light ECU (Front controller) | TERMINALS OF ECU | |
| CAN communication line | HOW TO PROCEED WITH TROUBLESHOOTING | |
| Temperature Control: No warm air comes out | Air mix servo motor (for Passenger side HOT) | DTC B1441/41 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (PASSENGER SIDE) |
| Air mix servo motor (for Driver side HOT) | DTC B1446/46 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (DRIVER SIDE) | |
| Air mix servo motor (for Driver side front A/C rear air flow) | DTC B1457/57 DRIVER SIDE AIR OUTLET DAMPER CONTROL SERVO MOTOR CIRCUIT | |
| Air mix servo motor (for Passenger side front A/C rear air flow) | DTC B1458/58 PASSENGER SIDE AIR OUTLET DAMPER CONTROL SERVO MOTOR CIRCUIT | |
| Room temperature sensor circuit | DTC B1411/11 ROOM TEMPERATURE SENSOR CIRCUIT | |
| Rear room temperature sensor circuit | DTC B1419/19 REAR ROOM TEMPERATURE SENSOR CIRCUIT | |
| Solar sensor circuit (for Passenger side) | DTC B1421/21 SOLAR SENSOR CIRCUIT (PASSENGER SIDE) | |
| Solar sensor circuit (for Driver side) | DTC B1424/24 SOLAR SENSOR CIRCUIT (DRIVER SIDE) | |
| Rear solar sensor circuit | DTC B1428/28 REAR SOLAR SENSOR CIRCUIT | |
| Ambient temperature sensor circuit | DTC B1412/12 AMBIENT TEMPERATURE SENSOR CIRCUIT | |
| Air conditioning harness | DTC B1497/97 BUS IC COMMUNICATION MALFUNCTION | |
| Air conditioning amplifier | TERMINALS OF ECU | |
| Front light ECU (Front controller) | TERMINALS OF ECU | |
| CAN communication line | HOW TO PROCEED WITH TROUBLESHOOTING | |
| Temperature Control: Output air is warmer or cooler than the set temperature or response is slow | Volume of refrigerant | REFRIGERANT |
| Refrigerant pressure | REFRIGERANT | |
| Room temperature sensor circuit | DTC B1411/11 ROOM TEMPERATURE SENSOR CIRCUIT | |
| Rear room temperature sensor circuit | DTC B1419/19 REAR ROOM TEMPERATURE SENSOR CIRCUIT | |
| Solar sensor circuit (for Passenger side) | DTC B1421/21 SOLAR SENSOR CIRCUIT (PASSENGER SIDE) | |
| Solar sensor circuit (for Driver side) | DTC B1424/24 SOLAR SENSOR CIRCUIT (DRIVER SIDE) | |
| Rear solar sensor circuit | DTC B1428/28 REAR SOLAR SENSOR CIRCUIT | |
| Ambient temperature sensor circuit | DTC B1415/15 DRIVER SIDE DUCT SENSOR | |
| Driver side duct sensor | DTC B1416/16 PASSENGER SIDE DUCT SENSOR | |
| Passenger side duct sensor | DTC B1412/12 AMBIENT TEMPERATURE SENSOR CIRCUIT | |
| Air mix servo motor (for Passenger side HOT) | DTC B1441/41 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (PASSENGER SIDE) | |
| Air inlet servo motor | DTC B1442/42 AIR INLET DAMPER CONTROL SERVO MOTOR CIRCUIT | |
| Air mix servo motor (for Driver side HOT) | DTC B1446/46 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (DRIVER SIDE) | |
| Air mix servo motor (for Driver side COOL) | DTC B1453/53 DRIVER SIDE AIR OUTLET DAMPER COOL CONTROL SERVO MOTOR CIRCUIT | |
| Air mix servo motor (for Passenger side COOL) | DTC B1454/54 PASSENGER SIDE AIR OUTLET DAMPER COOL CONTROL SERVO MOTOR CIRCUIT | |
| Air mix servo motor (for Driver side front A/C rear air flow) | DTC B1457/57 DRIVER SIDE AIR OUTLET DAMPER CONTROL SERVO MOTOR CIRCUIT | |
| Air mix servo motor (for Passenger side front A/C rear air flow) | DTC B1458/58 PASSENGER SIDE AIR OUTLET DAMPER CONTROL SERVO MOTOR CIRCUIT | |
| Cool air bypass servo motor (for Driver side) | DTC B1444/44 DRIVER SIDE COOL AIR BYPASS DAMPER CONTROL | |
| Cool air bypass servo motor (for Passenger side) | DTC B1445/45 PASSENGER SIDE COOL AIR BYPASS DAMPER CONTROL | |
| Max hot bypass servo motor (for HOT) | DTC B1459/59 MAX HOT BYPASS DAMPER HOT CONTROL CIRCUIT | |
| Max hot bypass servo motor (for COOL) | DTC B1493/93 MAX HOT BYPASS DAMPER COOL CONTROL CIRCUIT | |
| Cooler expansion valve | - | |
| Heater radiator | - | |
| Air conditioning harness | DTC B1497/97 BUS IC COMMUNICATION MALFUNCTION | |
| Air conditioning amplifier | TERMINALS OF ECU | |
| Front light ECU (Front controller) | TERMINALS OF ECU | |
| CAN communication line | HOW TO PROCEED WITH TROUBLESHOOTING | |
| Temperature Control: No temperature control (Only Max. cool or Max. warm) | Room temperature sensor circuit | DTC B1411/11 ROOM TEMPERATURE SENSOR CIRCUIT |
| Rear room temperature sensor circuit | DTC B1419/19 REAR ROOM TEMPERATURE SENSOR CIRCUIT | |
| Ambient temperature sensor circuit | DTC B1412/12 AMBIENT TEMPERATURE SENSOR CIRCUIT | |
| Max hot bypass servo motor (for HOT) | DTC B1459/59 MAX HOT BYPASS DAMPER HOT CONTROL CIRCUIT | |
| Max hot bypass servo motor (for COOL) | DTC B1493/93 MAX HOT BYPASS DAMPER COOL CONTROL CIRCUIT | |
| Multi-display | TERMINALS OF ECU | |
| Integration control and panel* | TERMINALS OF ECU | |
| Air conditioning harness | DTC B1497/97 BUS IC COMMUNICATION MALFUNCTION | |
| Air conditioning amplifier | TERMINALS OF ECU | |
| CAN communication line | HOW TO PROCEED WITH TROUBLESHOOTING | |
| PTC heater does not operate | PTC heater circuit | PTC HEATER CIRCUIT |
| Air conditioning amplifier | TERMINALS OF ECU | |
| No air inlet control | Air inlet servo motor | DTC B1442/42 AIR INLET DAMPER CONTROL SERVO MOTOR CIRCUIT |
| Exhaust gas sensor circuit | DTC B1418/18 EXHAUST GAS SENSOR CIRCUIT | |
| Emission gas NOx sensor circuit | DTC B1461/61 EMISSION GAS NOX SENSOR CIRCUIT | |
| Air conditioning harness | DTC B1497/97 BUS IC COMMUNICATION MALFUNCTION | |
| Air conditioning amplifier | TERMINALS OF ECU | |
| Front light ECU (Front controller) | TERMINALS OF ECU | |
| No air flow mode control | Air outlet servo motor (for Driver side FACE) | DTC B1443/43 AIR OUTLET DAMPER CONTROL SERVO MOTOR CIRCUIT |
| Air outlet servo motor (for Passenger side FACE) | DTC B1448/48 PASSENGER SIDE FACE SERVO MOTOR CIRCUIT | |
| Air outlet servo motor (for Driver side FOOT/DEF) | DTC B1455/55 DRIVER SIDE AIR OUTLET DAMPER FOOT/DEF CONTROL SERVO MOTOR CIRCUIT | |
| Air outlet servo motor (for Passenger side FOOT/DEF) | DTC B1456/56 PASSENGER SIDE AIR OUTLET DAMPER FOOT/DEF CONTROL SERVO MOTOR CIRCUIT | |
| Air outlet servo motor (for Driver side front A/C rear air flow) | DTC B1486/86 DRIVER SIDE AIR OUTLET DAMPER CONTROL SERVO MOTOR CIRCUIT | |
| Air outlet servo motor (for Passenger side front A/C rear air flow) | DTC B1487/87 PASSENGER SIDE AIR OUTLET DAMPER CONTROL SERVO MOTOR CIRCUIT | |
| Infrared ray sensor circuit | DTC B1469/69 INFRARED RAY SENSOR CIRCUIT | |
| Infrared ray sensor communication malfunction | DTC B1492/92 INFRARED RAY SENSOR COMMUNICATION MALFUNCTION | |
| LIN communication line | HOW TO PROCEED WITH TROUBLESHOOTING | |
| Air conditioning harness | DTC B1497/97 BUS IC COMMUNICATION MALFUNCTION | |
| Air conditioning amplifier | TERMINALS OF ECU | |
| Blinking of A/C indicator | Multi-display | TERMINALS OF ECU |
| Integration control and panel* | TERMINALS OF ECU | |
| CAN communication line | HOW TO PROCEED WITH TROUBLESHOOTING | |
| Compressor solenoid circuit | DTC B1451/51 COMPRESSOR SOLENOID CIRCUIT | |
| Air conditioning amplifier | TERMINALS OF ECU | |
| Diagnostic trouble codes are not recorded. Set mode is cleared when engine switch turned off. | Back-up power source circuit | BACK-UP POWER SOURCE CIRCUIT |
| Air conditioning amplifier | TERMINALS OF ECU | |
| HINT: *: w/o Multi-display |
||
Rear cooler unit
REAR COOLER UNIT - PROBLEM SYMPTOM CHART
| Symptom | Suspected Area | Refer To |
|---|---|---|
| All functions of A/C system do not operate | RR-IG1-2, RR MPX-B2, RR A/C fuse | - |
| Wire harness or connector | - | |
| LIN communication line | HOW TO PROCEED WITH TROUBLESHOOTING | |
| IG power source circuit | IG POWER SOURCE CIRCUIT | |
| Back-up power source circuit | BACK-UP POWER SOURCE CIRCUIT | |
| Rear power seat module (Rear A/C switch) | - | |
| Rear air conditioning control panel circuit | REAR AIR CONDITIONING CONTROL PANEL CIRCUIT | |
| Air conditioning amplifier | TERMINALS OF ECU | |
| Air Flow Control: No blower operation | Rear blower motor circuit | REAR BLOWER MOTOR CIRCUIT |
| Air conditioning amplifier | TERMINALS OF ECU | |
| Air Flow Control: Insufficient air flow | Rear blower motor circuit | REAR BLOWER MOTOR CIRCUIT |
| Rear air outlet servo motor (for LH side) | DTC B1449/49 REAR AIR OUTLET DAMPER CONTROL SERVO MOTOR CIRCUIT | |
| Rear air outlet servo motor (for RH side) | DTC B1489/89 REAR AIR OUTLET DAMPER CONTROL SERVO MOTOR RH CIRCUIT | |
| Rear exhaust mode servo motor (for Emission) | DTC B1494/94 REAR EMISSION SERVO MOTOR CIRCUIT | |
| Rear exhaust mode servo motor (for Diffusion) | DTC B1495/95 REAR DIFFUSE SERVO MOTOR CIRCUIT | |
| Rear air conditioning harness | - | |
| Air conditioning amplifier | TERMINALS OF ECU | |
| Temperature Control: No cool air comes out | Volume of refrigerant | REFRIGERANT |
| Refrigerant pressure | REFRIGERANT | |
| Compressor and pulley | COMPRESSOR AND MAGNETIC CLUTCH | |
| Pressure sensor circuit | DTC B1423/23 PRESSURE SENSOR CIRCUIT | |
| Compressor solenoid circuit | DTC B1451/51 COMPRESSOR SOLENOID CIRCUIT | |
| Rear air outlet servo motor (for LH side) | DTC B1449/49 REAR AIR OUTLET DAMPER CONTROL SERVO MOTOR CIRCUIT | |
| Rear air outlet servo motor (for RH side) | DTC B1489/89 REAR AIR OUTLET DAMPER CONTROL SERVO MOTOR RH CIRCUIT | |
| Rear exhaust mode servo motor (for Emission) | DTC B1494/94 REAR EMISSION SERVO MOTOR CIRCUIT | |
| Rear exhaust mode servo motor (for Diffusion) | DTC B1495/95 REAR DIFFUSE SERVO MOTOR CIRCUIT | |
| Rear room temperature sensor circuit | DTC B1419/19 REAR ROOM TEMPERATURE SENSOR CIRCUIT | |
| Rear solar sensor circuit | DTC B1428/28 REAR SOLAR SENSOR CIRCUIT | |
| Ambient temperature sensor circuit | DTC B1412/12 AMBIENT TEMPERATURE SENSOR CIRCUIT | |
| Evaporator temperature sensor circuit | DTC B1413/13 EVAPORATOR TEMPERATURE SENSOR CIRCUIT | |
| Rear magnetic valve circuit | REAR MAGNETIC VALVE CIRCUIT | |
| Rear air conditioning harness | - | |
| Air conditioning amplifier | TERMINALS OF ECU | |
| Front light ECU (Front controller) | TERMINALS OF ECU | |
| CAN communication line | HOW TO PROCEED WITH TROUBLESHOOTING | |
| No air flow mode control | Rear air outlet servo motor (for LH side) | DTC B1449/49 REAR AIR OUTLET DAMPER CONTROL SERVO MOTOR CIRCUIT |
| Rear air outlet servo motor (for RH side) | DTC B1489/89 REAR AIR OUTLET DAMPER CONTROL SERVO MOTOR RH CIRCUIT | |
| Rear exhaust mode servo motor (for Emission) | DTC B1494/94 REAR EMISSION SERVO MOTOR CIRCUIT | |
| Rear exhaust mode servo motor (for Diffusion) | DTC B1495/95 REAR DIFFUSE SERVO MOTOR CIRCUIT | |
| Infrared ray sensor circuit | DTC B1469/69 INFRARED RAY SENSOR CIRCUIT | |
| Infrared ray sensor communication malfunction | DTC B1492/92 INFRARED RAY SENSOR COMMUNICATION MALFUNCTION | |
| LIN communication line | HOW TO PROCEED WITH TROUBLESHOOTING | |
| Rear air conditioning harness | - | |
| Air conditioning amplifier | TERMINALS OF ECU | |
| Air purifier does not operate | Smoke sensor circuit | SMOKE SENSOR CIRCUIT |
| Rear junction block ECU | - | |
| Rear exhaust mode servo motor (for Diffusion) | DTC B1495/95 REAR DIFFUSE SERVO MOTOR CIRCUIT | |
| Rear air conditioning harness | - | |
| Air conditioning amplifier | TERMINALS OF ECU | |
| CAN communication line | HOW TO PROCEED WITH TROUBLESHOOTING |