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Home >> Toyota >> 2009 >> Highlander Limited, FWD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Air Conditioning (Except Hybrid) >> AIR CONDITIONING SYSTEM (for Manual Air Conditioning System) >> Problem Symptoms Table

Problem Symptoms Table

HINT:

Air conditioning system 

PROBLEM SYMPTOMS CHART

Symptom Suspected Area Refer to
No functions of air conditioning control panel operate LIN communication line -
Air conditioning control HEATER CONTROL PANEL POWER SOURCE CIRCUIT 
Air conditioning amplifier TERMINALS OF ECU 
No functions of air conditioning system operate A/C NO. 2 fuse -
Air conditioning control HEATER CONTROL PANEL POWER SOURCE CIRCUIT 
Air conditioning amplifier TERMINALS OF ECU 
Wire harness or connector -
Airflow Control: No blower control (Blower motor does not operate) HTR H-fuse -
Blower motor circuit BLOWER MOTOR CIRCUIT 
Air conditioning amplifier TERMINALS OF ECU 
Air conditioning control HEATER CONTROL PANEL POWER SOURCE CIRCUIT 
Wire harness or connector -
Airflow Control: No blower control (Blower motor does not change speed) Blower motor circuit BLOWER MOTOR CIRCUIT 
Air conditioning amplifier TERMINALS OF ECU 
Air conditioning control HEATER CONTROL PANEL POWER SOURCE CIRCUIT 
Temperature Control: No cool air comes out Refrigerant volume REPLACEMENT 
Refrigerant pressure REPLACEMENT 
Air conditioning pressure sensor DTC B1423/23 PRESSURE SENSOR CIRCUIT 
Air conditioning compressor magnetic clutch circuit AIR CONDITIONING COMPRESSOR MAGNETIC CLUTCH CIRCUIT 
Compressor lock sensor circuit DTC B1422/22 COMPRESSOR LOCK SENSOR CIRCUIT 
Compressor solenoid circuit DTC B1451/51 COMPRESSOR SOLENOID CIRCUIT 
Air mix damper control servo motor circuit DTC B1441/41 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (PASSENGER SIDE) 
Evaporator temperature sensor circuit DTC B1413/13 EVAPORATOR TEMPERATURE SENSOR CIRCUIT 
Ambient temperature sensor circuit DTC B1412/12 AMBIENT TEMPERATURE SENSOR CIRCUIT 
Expansion valve -
Air conditioning amplifier TERMINALS OF ECU 
Air conditioning control HEATER CONTROL PANEL POWER SOURCE CIRCUIT 
ECM HOW TO PROCEED WITH TROUBLESHOOTING
ECM HOW TO PROCEED WITH TROUBLESHOOTING
LIN communication line -
CAN communication system PROBLEM SYMPTOMS TABLE
Temperature Control: No warm air comes out Air mix damper control servo motor circuit DTC B1441/41 AIR MIX DAMPER CONTROL SERVO MOTOR CIRCUIT (PASSENGER SIDE) 
Air conditioning harness -
Air conditioning amplifier TERMINALS OF ECU 
Air conditioning control HEATER CONTROL PANEL POWER SOURCE CIRCUIT 
ECM HOW TO PROCEED WITH TROUBLESHOOTING
ECM HOW TO PROCEED WITH TROUBLESHOOTING
LIN communication line -
CAN communication system PROBLEM SYMPTOMS TABLE
Temperature Control: Output air is warmer or cooler than set temperature or response is slow Air inlet damper control servo motor circuit DTC B1442/42 AIR INLET DAMPER CONTROL SERVO MOTOR CIRCUIT 
Heater radiator -
Expansion valve -
Air conditioning amplifier TERMINALS OF ECU 
Air conditioning control HEATER CONTROL PANEL POWER SOURCE CIRCUIT 
ECM HOW TO PROCEED WITH TROUBLESHOOTING
ECM HOW TO PROCEED WITH TROUBLESHOOTING
LIN communication line -
CAN communication system PROBLEM SYMPTOMS TABLE
Temperature Control: No temperature control (Only Max. cool or Max. warm) Air conditioning amplifier TERMINALS OF ECU 
Air conditioning control HEATER CONTROL PANEL POWER SOURCE CIRCUIT 
LIN communication line -
No air inlet control Air outlet damper control servo motor circuit DTC B1443/43 AIR OUTLET DAMPER CONTROL SERVO MOTOR CIRCUIT 
Air inlet damper control servo motor circuit DTC B1442/42 AIR INLET DAMPER CONTROL SERVO MOTOR CIRCUIT 
evaporator temperature sensor circuit DTC B1413/13 EVAPORATOR TEMPERATURE SENSOR CIRCUIT 
Air conditioning amplifier TERMINALS OF ECU 
No air flow mode control Air outlet damper control servo motor circuit DTC B1443/43 AIR OUTLET DAMPER CONTROL SERVO MOTOR CIRCUIT 
Air conditioning amplifier TERMINALS OF ECU 
Engine idle up does not occur, or is continuous Air conditioning compressor magnetic clutch circuit AIR CONDITIONING COMPRESSOR MAGNETIC CLUTCH CIRCUIT 
Compressor lock sensor circuit DTC B1422/22 COMPRESSOR LOCK SENSOR CIRCUIT 
Compressor solenoid circuit DTC B1451/51 COMPRESSOR SOLENOID CIRCUIT 
Air conditioning control HEATER CONTROL PANEL POWER SOURCE CIRCUIT 
LIN communication line -
Air conditioning amplifier -
ECM (for 2GR-FE) HOW TO PROCEED WITH TROUBLESHOOTING
ECM (for 1AR-FE) HOW TO PROCEED WITH TROUBLESHOOTING
A/C indicator blinking Compressor solenoid circuit DTC B1451/51 COMPRESSOR SOLENOID CIRCUIT 
Air conditioning amplifier TERMINALS OF ECU 
Diagnostic trouble codes sre not recorded. Set mode is cleared when ignition switch turnes off Air comditioning amplifier TERMINALS OF ECU 
Back-up power source circuit BACK-UP POWER SOURCE CIRCUIT