Tech Tips
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.
| Symptom | Suspected Area | Link |
|---|---|---|
| All functions of air conditioning system do not operate. | Harness or connector | - |
| Air conditioning control assembly | ||
| Air conditioning amplifier assembly | ||
| Air flow control: No blower operation. (blower motor does not operate) | Harness or connector | - |
| Blower resistor | ||
| Air conditioning control assembly | ||
| Blower with fan motor sub-assembly | ||
| Air flow control: No blower control. (blower motor does not change speed) | Harness or connector | - |
| Blower resistor | ||
| Air conditioning control assembly | ||
| Air flow control: Insufficient air comes out. | Harness or connector | - |
| Blower resistor | ||
| Air conditioning control assembly | ||
| Blower with fan motor sub-assembly | ||
| Temperature control: Cooling effectiveness is poor.* | Refrigerant volume | |
| Refrigerant pressure | ||
| Check refrigerant line | ||
| No. 1 cooler expansion valve | ||
| Air conditioning compressor magnetic clutch circuit | ||
| Compressor assembly with magnet clutch (for 1GD-FTV, 2GD-FTV) | ||
| Compressor assembly with magnet clutch (for 1KD-FTV, 2KD-FTV) | ||
| Compressor assembly with magnet clutch (for 2TR-FE) | ||
| Compressor assembly with magnet clutch (for 5L-E) | ||
| STOP/CDS FAN relay (w/ Condenser Fan) | ||
| Shroud blower assembly (w/ Condenser Fan) | ||
| Harness or connector (Shroud Blower Assembly Circuit) | - | |
| Air conditioning amplifier assembly | ||
| Temperature control: No cool air comes out.* | Refrigerant volume | |
| Refrigerant pressure | ||
| Check refrigerant line | ||
| Air conditioner pressure switch | ||
| Evaporator temperature sensor circuit | ||
| Air conditioning compressor magnetic clutch circuit | ||
| Ambient temperature sensor circuit | ||
| Compressor assembly with magnet clutch (for 1GD-FTV, 2GD-FTV) | ||
| Compressor assembly with magnet clutch (for 1KD-FTV, 2KD-FTV) | ||
| Compressor assembly with magnet clutch (for 2TR-FE) | ||
| Compressor assembly with magnet clutch (for 5L-E) | ||
| STOP/CDS FAN relay (w/ Condenser Fan) | ||
| Shroud blower assembly (w/ Condenser Fan) | ||
| Harness or connector (Shroud Blower Assembly Circuit) | - | |
| Air conditioning control assembly | ||
| Defroster damper control sub-assembly | ||
| Air conditioning amplifier assembly | ||
| ECM (for 1KD-FTV) | ||
| ECM (for 1GD-FTV) | ||
| ECM (for 2GD-FTV) | ||
| ECM (for 2KD-FTV) | ||
| ECM (for 5L-E) | ||
| ECM (for 2TR-FE) | ||
| No. 1 cooler expansion valve | ||
| No. 1 cooler evaporator | ||
| Temperature control: Output air is warmer or cooler than set temperature or response is slow.* | Refrigerant volume | |
| Refrigerant pressure | ||
| Check refrigerant line | ||
| Air conditioner pressure switch | ||
| Evaporator temperature sensor circuit | ||
| Air conditioning compressor magnetic clutch circuit | ||
| Ambient temperature sensor circuit | ||
| Compressor assembly with magnet clutch | ||
| Air conditioning control assembly | ||
| Defroster damper control sub-assembly | ||
| Air conditioning amplifier assembly | ||
| ECM (for 1KD-FTV) | ||
| ECM (for 1GD-FTV) | ||
| ECM (for 2GD-FTV) | ||
| ECM (for 2KD-FTV) | ||
| ECM (for 5L-E) | ||
| ECM (for 2TR-FE) | ||
| No. 1 cooler expansion valve | ||
| No. 1 cooler evaporator | ||
| Temperature control: No temperature control. | Air conditioning control assembly | |
| No air inlet control. | Harness or connector | - |
| Air conditioning control assembly | ||
| No. 1 blower damper servo sub-assembly | ||
| Engine coolant does not warm up quickly when engine is cold (w/ PTC Heater). | CAN communication system (for RHD) | |
| Proceed to "PTC Heater Circuit" | ||
| Engine idle up does not occur when idle up switch is pushed while engine is cold (w/ PTC Heater). | CAN communication system (for RHD) | |
| Proceed to "Idle Up Switch Circuit" | ||
| Diagnostic Trouble Codes (DTCs) are not recorded. Set mode is cleared when the ignition switch is turned off. | Air conditioning amplifier assembly |
*: Check that the radiator, condenser and intercooler are not blocked with leaves, dirt or insects, and clean them if necessary. Also check the installation condition of hose connection, and check for corrosion, etc.
for 1KD-FTV: Click here
for 1GD-FTV: Click here
for 2GD-FTV: Click here
for 2KD-FTV: Click here
for 5L-E: Click here
for 2TR-FE: Click here
| Symptom | Suspected Area | Link |
|---|---|---|
| All functions of rear cooler do not operate. | Rear cooler relay | |
| Rear cooler switch | ||
| Rear blower resistor | ||
| Rear blower with fan motor sub-assembly | ||
| Harness or connector | - | |
| Air Flow Control: No blower operation. | Rear cooler switch | |
| Rear blower resistor | ||
| Rear blower with fan motor sub-assembly | ||
| Harness or connector | - | |
| Air Flow Control: No blower control. | Rear blower resistor | |
| Rear blower with fan motor sub-assembly | ||
| Harness or connector | - | |
| Temperature Control: No cool air comes out. | Rear cooler switch | |
| Harness or connector | - | |
| Rear cooling unit expansion valve |