Toyota Venza manuals

Toyota Venza: 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

See page

All functions of the A/C system do not operate

IG power source circuit


Back-up power source circuit


Air conditioning control panel circuit


A/C amplifier


Air flow control: No blower operation

Blower motor circuit


Air conditioning control panel circuit


A/C amplifier


Air flow control: No blower control

Blower motor circuit


Air conditioning control panel circuit


A/C amplifier


Air flow control: Insufficient air flow

Blower motor circuit


A/C amplifier


Temperature control: No cool air comes out

Refrigerant volume

-

Refrigerant pressure


Air conditioning pressure sensor circuit


Air conditioning compressor magnetic clutch circuit*1


Compressor lock sensor circuit*1


Compressor solenoid circuit


Air mix damper control servo motor circuit (for Driver side)


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


Evaporator temperature sensor circuit


Room temperature sensor circuit


Ambient temperature sensor circuit


Air conditioning control panel circuit


Expansion valve


A/C amplifier


ECM*1


ECM*2


Temperature control: No warm air comes out

Air mix damper control servo motor circuit (for Driver side)


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


Evaporator temperature sensor circuit


Room temperature sensor circuit


Ambient temperature sensor circuit


Air conditioning control panel circuit


A/C amplifier


ECM*1


ECM*2


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

Refrigerant volume

-

Refrigerant pressure


Air conditioning compressor magnetic clutch circuit*1


Compressor lock sensor circuit*1


Compressor solenoid circuit


Solar sensor circuit (for Driver side)


Solar sensor circuit (for Front passenger side)


Room temperature sensor circuit


Ambient temperature sensor circuit


Air mix damper control servo motor circuit (for Driver side)


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


Air inlet damper control servo motor circuit


Air conditioning control panel circuit


Radiator unit sub-assembly


Expansion valve


A/C amplifier


ECM*1


ECM*2


Temperature control: No temperature control (only Max. cool or Max. warm)

Air mix damper control servo motor circuit (for Driver side)


Air mix damper control servo motor circuit (for Front Passenger side)


Room temperature sensor circuit


Ambient temperature sensor circuit


Evaporator temperature sensor circuit


Solar sensor circuit (for Driver side)


Solar sensor circuit (for Front passenger side)


Air conditioning control panel circuit


A/C amplifier


No air inlet control

Air inlet damper control servo motor circuit


Air conditioning control panel circuit


A/C amplifier


No air flow mode control

Air outlet damper control servo motor circuit


Air conditioning control panel circuit


A/C amplifier


Engine does not start for heater

Air conditioning compressor magnetic clutch circuit*1


Compressor lock sensor circuit*1


Compressor solenoid circuit


A/C amplifier


Blinking of A/C indicator

Compressor solenoid circuit


A/C amplifier


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

Back-up power source circuit


A/C amplifier


  • *1: for 2GR-FE
  • *2: for 1AR-FE
Customize Parameters
CUSTOMIZE PARAMETERS NOTICE: When the customer requests a change in a function, first make sure that the function can be customized. Be sure to make a note of the current settings be ...

Terminals Of Ecu
TERMINALS OF ECU 1. A/C AMPLIFIER HINT: Check from the rear of the connector while it is connected to the A/C amplifier. Terminal No. (Symbol) Wiring Color Te ...

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