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.
Air conditioning system
|
Symptom
|
Suspected Area
|
See page
|
|
All functions of the air conditioning system do not operate
|
IG power source circuit
|
|
|
LIN communication system
|
|
|
Air conditioning control assembly
|
|
|
Air conditioning amplifier
|
|
|
Air Flow Control: No blower operation
|
Blower motor circuit
|
|
|
LIN communication system
|
|
|
Air conditioning control assembly
|
|
|
Air conditioning amplifier
|
|
|
Air Flow Control: No blower control
|
Blower motor circuit
|
|
|
LIN communication system
|
|
|
Air conditioning control assembly
|
|
|
Air conditioning amplifier
|
|
|
Air Flow Control: Insufficient air flow
|
Blower motor circuit
|
|
|
Air conditioning amplifier
|
|
|
Temperature Control: No cool air comes out
|
Refrigerant volume (for HFC-134a(R134a))
|
|
|
Refrigerant volume (for HFO-1234yf(R1234yf))
|
|
|
Refrigerant pressure (for HFC-134a(R134a))
|
|
|
Refrigerant pressure (for HFO-1234yf(R1234yf))
|
|
|
Pressure switch circuit
|
|
|
Air conditioning compressor magnetic clutch circuit
|
|
|
Compressor lock sensor circuit
|
|
|
Air mix damper control servo motor circuit
|
|
|
Evaporator temperature sensor circuit
|
|
|
Ambient temperature sensor circuit
|
|
|
LIN communication system
|
|
|
Expansion valve
|
|
|
Air conditioning control assembly
|
|
|
No. 1 damper servo sub-assembly (air mix servo motor)
|
|
|
Air conditioning harness
|
-
|
|
Air conditioning amplifier
|
|
|
ECM (for 1UR-FE)
|
|
|
ECM (for 3UR-FE)
|
|
|
ECM (for 3UR-FBE)
|
|
|
Temperature Control: No warm air comes out
|
Air mix damper control servo motor circuit
|
|
|
Evaporator temperature sensor circuit
|
|
|
Ambient temperature sensor circuit
|
|
|
No. 1 damper servo sub-assembly (air mix servo motor)
|
|
|
Air conditioning harness
|
-
|
|
Air conditioning amplifier
|
|
|
Temperature Control: Output air is warmer or cooler than the set temperature
or response is slow
|
Refrigerant volume
|
|
|
Refrigerant pressure
|
|
|
Ambient temperature sensor circuit
|
|
|
Air mix damper control servo motor circuit
|
|
|
Radiator unit sub-assembly (for 1UR-FE)
|
|
|
Radiator unit sub-assembly (for 3UR-FE)
|
|
|
Radiator unit sub-assembly (for 3UR-FBE)
|
|
|
Expansion valve
|
|
|
No. 1 damper servo sub-assembly (air mix servo motor)
|
|
|
Air conditioning harness
|
-
|
|
Air conditioning amplifier
|
|
|
Temperature Control: No temperature control (only Max. cool or Max. warm)
|
Air mix damper control servo motor circuit
|
|
|
Ambient temperature sensor circuit
|
|
|
Evaporator temperature sensor circuit
|
|
|
Air conditioning control assembly
|
|
|
No. 1 damper servo sub-assembly (air mix servo motor)
|
|
|
Air conditioning harness
|
-
|
|
Air conditioning amplifier
|
|
|
No air inlet control
|
Air inlet control servo motor circuit
|
|
|
Air inlet servo motor
|
|
|
Air conditioning harness
|
-
|
|
Air conditioning amplifier
|
|
|
No air flow mode control
|
Air outlet control servo motor circuit
|
|
|
No. 1 damper servo sub-assembly (air outlet servo motor)
|
|
|
Air conditioning harness
|
-
|
|
Air conditioning amplifier
|
|
|
Engine idle up does not occur, or is continuous
|
Air conditioning compressor magnetic clutch circuit
|
|
|
Compressor lock sensor circuit
|
|
|
LIN communication system
|
|
|
Air conditioning control assembly
|
|
|
Air conditioning amplifier
|
|
|
ECM (for 1UR-FE)
|
|
|
ECM (for 3UR-FE)
|
|
|
ECM (for 3UR-FBE)
|
|
|
Blinking of A/C indicator
|
Air conditioning amplifier
|
|
|
Diagnostic trouble codes are not recorded. Set mode is cleared when ignition
switch is turned OFF.
|
Air conditioning amplifier
|
|
