AIR CONDITIONING SYSTEM > PROBLEM SYMPTOMS TABLE

for Preparation Click here


HINT:
  1. 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.
  1. Inspect the fuses and relays related to this system before inspecting the suspected areas below.
  1. If the malfunction still exists even after checking and confirming that all the circuits are normal, replace the A/C amplifier.


A/C system 
Symptom
Suspected area
See page
All functions of A/C system do not operate
A/C control assembly
 Click here
A/C amplifier assembly
 Click here
Wire harness
-
Air flow control: No blower operation
Blower resistor
 Click here
Blower w/ fan motor sub-assembly
 Click here
A/C control assembly
 Click here
Wire harness
-
Air flow control: No blower control
Blower resistor
 Click here
A/C control assembly
 Click here
Wire harness
-
Air flow control: Insufficient air comes out
Blower w/ fan motor sub-assembly
 Click here
Blower resistor
 Click here
A/C control assembly
 Click here
Wire harness
-
Temperature control: No cool air comes out
Volume of refrigerant
 Click here
Drive belt (1TR-FE)
 Click here
Drive belt (2TR-FE)
 Click here
Drive belt (2KD-FTV)
 Click here
Refrigerant pressure
 Click here
Cooler compressor assembly (TR Series Engine)
 Click here
Cooler compressor assembly (2KD-FTV)
 Click here
Magnet clutch relay*1
 Click here
A/C pressure switch
 Click here
Air mix control cable
-
A/C control assembly
 Click here
Wire harness
-
Temperature control: Output air is warmer or cooler than set temperature or response is slow
Air mix control cable
-
A/C control assembly
 Click here
Temperature control: No temperature control
Air mix control cable
-
A/C control assembly
 Click here
No air inlet control
Air inlet damper control cable
-
A/C control assembly
 Click here
No air outlet control
Mode control cable
-
A/C control assembly
 Click here
Engine idle-up does not occur, or is continuous
Cooler compressor assembly (TR Series Engine)
 Click here
Cooler compressor assembly (2KD-FTV)
 Click here
A/C control assembly
 Click here
A/C amplifier assembly
 Click here
ECM
 Click here
PTC heater does not function*1, *2
PTC heater relay
 Click here
Heater switch assembly
 Click here
Air mix control cable
-
A/C control assembly
 Click here
A/C unit assembly (Max. HOT switch)
 Click here
A/C amplifier assembly
 Click here
ECM
 Click here
Wire harness
-
Quick heater and accessory assembly
 Click here

HINT:
  1. *1: w/ PTC heater
  1. *2: The PTC heater operation may be stopped when an electrical load is large on the entire vehicle.