Toyota CH-R Service Manual: Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

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.
Air Conditioning System

Symptom

Suspected Area

Link

All functions of the air conditioning system do not operate

IG power source circuit

Back-up power source circuit

LIN communication circuit

Air conditioning amplifier assembly

Air flow Control: No blower operation

Blower motor circuit

LIN communication circuit

Air conditioning amplifier assembly

Air flow control: No blower control

Blower motor circuit

LIN communication circuit

Air conditioning amplifier assembly

Air flow control: Insufficient air flow

Blower motor circuit

Air conditioning amplifier assembly

Temperature control: No cool air comes out

Refrigerant volume

-

Refrigerant pressure

Air conditioner pressure sensor circuit

LIN communication circuit

Air mix damper control servo motor circuit (for driver side air mix)

Air mix damper control servo motor circuit (for front passenger side air mix)

Evaporator temperature sensor circuit

Room temperature sensor circuit

Ambient temperature sensor circuit

Cooler expansion valve

No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix)

No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix)

Air conditioning harness assembly

Compressor with pulley assembly

Air conditioning amplifier assembly

ECM

Temperature control: No warm air comes out

LIN communication circuit

Air mix damper control servo motor circuit (for driver side air mix)

Air mix damper control servo motor circuit (for front passenger side air mix)

Evaporator temperature sensor circuit

Room temperature sensor circuit

Ambient temperature sensor circuit

No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix)

No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix)

Air conditioning harness assembly

Air conditioning amplifier assembly

ECM

Temperature control: Output air is warmer or cooler than the set temperature or response is slow

Refrigerant volume

-

Refrigerant pressure

Solar sensor circuit

Room temperature sensor circuit

Ambient temperature sensor circuit

LIN communication circuit

Air mix damper control servo motor circuit (for driver side air mix)

Air mix damper control servo motor circuit (for front passenger side air mix)

Air inlet damper control servo motor circuit

Heater radiator unit sub-assembly

Cooler expansion valve

No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix)

No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix)

No. 1 blower damper servo sub-assembly (fresh/recirculation)

Air conditioning harness assembly

Air conditioning amplifier assembly

ECM

Temperature control: No temperature control (only MAX COLD or MAX HOT)

LIN communication circuit

Air mix damper control servo motor circuit (for driver side air mix)

Air mix damper control servo motor circuit (for front passenger side air mix)

Room temperature sensor circuit

Ambient temperature sensor circuit

Evaporator temperature sensor circuit

Solar sensor circuit

No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix)

No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix)

Air conditioning harness assembly

Air conditioning amplifier assembly

Temperature control: Output air temperature is different between left and right registers (the set temperature is the same for both)

Refrigerant volume

-

Refrigerant pressure

Air mix damper control servo motor circuit (for driver side air mix)

Air mix damper control servo motor circuit (for front passenger side air mix)

Automatic light control sensor

No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix)

No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix)

Air conditioning harness assembly

Air conditioning amplifier assembly

No air inlet control

LIN communication circuit

Air inlet damper control servo motor circuit

No. 1 blower damper servo sub-assembly (fresh/recirculation)

Air conditioning harness assembly

Air conditioning amplifier assembly

Quick heater assembly does not operate

PTC heater circuit

Air conditioning amplifier assembly

Diagnostic trouble codes (DTCs) are not recorded. Set mode is cleared when the ignition switch is turned off

Back-up power source circuit

Air conditioning amplifier assembly

    Initialization
    INITIALIZATION INITIALIZATION SERVO MOTOR (a) Turn the ignition switch off. (b) Connect the Techstream to the DLC3. (c) Turn the ignition switch to ON. (d) Press the A/C OFF switch. (e) Turn the ...

    Terminals Of Ecu
    TERMINALS OF ECU AIR CONDITIONING AMPLIFIER ASSEMBLY HINT: Check from the rear of the connector while it is connected to the air conditioning amplifier assembly. Terminal No. (Sy ...

    Other materials:

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