Toyota Tacoma (2015-2018) Service Manual: Problem Symptoms Table

No Cool Air Comes Out:

Volume of refrigerant

-

Air conditioner pressure sensor circuit

Air conditioning compressor magnetic clutch circuit

Compressor lock sensor circuit

Evaporator temperature sensor circuit

Air conditioner amplifier assembly

Wire harness or connector

-

No Cool Air Comes Out:

Blower resistor

Blower motor with fan sub-assembly

Air conditioning control assembly

Wire harness or connector

-

No Cool Air Comes Out:

No. 2 air conditioning radiator damper servo sub-assembly (for air mix)

Air conditioning control assembly

Wire harness or connector

-

No Cool Air Comes Out:

Volume of refrigerant

-

Blower motor performance check

-

Air mix damper servo full travel check

-

Recirculation damper servo operation check

-

No Engine Idle-up when A/C Switch ON

Air conditioner amplifier assembly

SFI system (2TR-FE)

SFI system (2GR-FKS)

Wire harness or connector

-

No Warm Air Comes Out:

Blower resistor

Blower motor with fan sub-assembly

Air conditioning control assembly

Wire harness or connector

-

No Warm Air Comes Out:

No. 2 air conditioning radiator damper servo sub-assembly (for air mix)

PTC heater circuit*1

Air conditioning control assembly

Wire harness or connector

-

No Warm Air Comes Out:

Volume of engine coolant

-

Air conditioning control assembly

Blower motor performance check

-

Air mix damper servo full travel check

-

Recirculation damper servo operation check

-

Heater radiator

-

Air Not Coming From Desired Outlets:

Blower resistor

Blower motor with fan sub-assembly

Air conditioning control assembly

Wire harness or connector

-

Air Not Coming From Desired Outlets:

No. 2 air conditioning radiator damper servo sub-assembly (for air mix)

Air conditioning control assembly

Wire harness or connector

-

Windshield Fogging:

Volume of refrigerant

-

Air conditioner pressure sensor circuit

Air conditioning compressor magnetic clutch circuit

Compressor lock sensor circuit

Evaporator temperature sensor circuit

Air conditioner amplifier assembly

Wire harness or connector

-

Windshield Fogging:

Blower resistor

Blower motor with fan sub-assembly

Air conditioning control assembly

Wire harness or connector

-

Windshield Fogging:

No. 2 air conditioning radiator damper servo sub-assembly (for air mix)

Air conditioning control assembly

Wire harness or connector

-

Windshield Fogging:

Volume of refrigerant

-

Blower motor performance check

-

Air mix damper servo full travel check

-

Recirculation damper servo operation check

-

Defrosting Insufficient:

Blower motor with fan sub-assembly

Mode doors: Check cooling, heating & door operation

-

Mode control servo motor: Hot air not coming, Go to no hot air comes out

-

Mode control servo motor: Cold air not coming, Go to no cold air comes out

-

Noise:

Blower motor: Inspect blower motor for debris/cracks

-

Fresh air intake area: Inspect fresh air intake area for debris

-

Noise:

Cooler compressor: Cooler compressor incorrectly fitted

-

Air conditioning compressor magnetic clutch circuit

Refrigerant charge amount

-

Compressor mounting bracket: Compressor mounting bracket incorrectly fitted

-

A/C lines secure & not grounded

-

Odor (Cycle through blower speed, mode, temperature to define odor type when engine is running and A/C switch is ON. (Musty smell, coolant oil smell))

Wet carpet: Inspect water, engine coolant or oil leaks

-

A/C drain tube: Inspect water, engine coolant or oil leaks

-

Fresh air intake area: Inspect water, engine coolant or oil leaks

-

Heater hose: Inspect water, engine coolant or oil leaks

-

Evaporator: Inspect water, engine coolant or oil leaks

-

Evapo case: Inspect water, engine coolant or oil leaks

-

Air Not Coming from Desired Outlets (Cycle the mode lever and check airflow for outlets when engine is running, A/C switch is ON.)

Blower motor with fan sub-assembly

No. 1 air conditioning radiator damper servo sub-assembly (for mode switching)

Mode doors: Check cooling, heating & door operation

-

Wire harness or connector

-

Air conditioning control assembly

The temperature control dial is rotated to the MAX A/C position, but the MAX A/C mode is not activated.

No. 2 air conditioning radiator damper servo sub-assembly (for air mix)

Air conditioning control assembly

Air conditioning amplifier assembly

Wire harness or connector

-

Quick heater assembly does not operate*1

PTC heater circuit

Air conditioning amplifier assembly

ECM (for 2TR-FE)

ECM (for 2GR-FKS)