Toyota Tacoma (2015-2018) Service Manual: System Description
SYSTEM DESCRIPTION
1. GENERAL
(a) The air conditioning system has the following controls.
|
Control |
Outline |
|---|---|
|
Manual Control |
The air conditioner amplifier assembly controls the damper positions (air inlet control damper, air mix control damper and mode control damper) and blower speed in accordance with the positions of the switches (temperature control dial, blower dial, mode select dial and air inlet control switch). |
|
Air Inlet Control |
Drives the air inlet servo motor (damper servo sub-assembly) according to the operation of the air inlet control switch and moves the dampers to the fresh or recirculation position. |
|
Compressor Control |
Controls the compressor with magnet clutch assembly to turn on or off based on the signals from various sensors. |
|
MAX Air Conditioning Control |
When the temperature control dial is turned to the MAX A/C position, the air conditioner amplifier assembly performs the following control to improve cooling efficiency:
|
|
Diagnosis |
A Diagnostic Trouble Code (DTC) is stored in the memory when the air conditioner amplifier assembly detects a problem with the air conditioning system. |
- *: for Double Cab
2. MODE POSITION AND DAMPER OPERATION
(a) Mode Position and Damper Operation
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Functions of Main Dampers
|
Control Door |
Operation Position |
Door Position |
Operation |
|
|---|---|---|---|---|
|
Air Inlet Control Door |
FRESH |
A |
Brings in fresh air. |
|
|
RECIRCULATION |
B |
Recirculates internal air. |
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|
Air Mix Control Door |
MAX COLD to MAX HOT Temperature Setting |
C - D - E (C' - D' - E') |
Varies the mixture ratio of warm air and cool air in order to regulate the temperature continuously between hot and cold. |
|
|
Mode Control Door |
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FACE |
F, J, N |
Air blows out of the front center register and side register. |
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BI-LEVEL |
G, L, N |
Air blows out of the front center register, side register and front and rear footwell register ducts*. |
|
.png) |
FOOT |
H, M, O |
Air blows out of the front and rear footwell register ducts*. In addition, air blows out slightly from the front and rear center register*, side register and defroster. |
|
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FOOT AND DEFROSTER |
H, M, P |
Defrosts the windshield through the center defroster, side defroster, side register, front and rear center register ducts*, while air is also blown out from the front and rear footwell register ducts*. |
|
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DEFROSTER |
I, J, Q |
Defrosts the windshield through the center defroster, side defroster. |
|
- *: for Double Cab
3. AIR OUTLETS AND AIRFLOW VOLUME
(a) Air Outlets and Airflow Volume
HINT:
The size of each circle â—‹ indicates the ratio of airflow volume.
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedure to troubleshoot the air conditioning system.
*: Use the Techstream.
PROCEDURE
1.
VEHICLE BROUG ...
System Diagram
SYSTEM DIAGRAM
...
Other materials:
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT SPEEDOMETER
(a) Check speedometer operation.
NOTICE:
The meter ECU receives the vehicle speed signal from the skid control
ECU via CAN communication. Therefore, perform the following inspection referring
to values on the Data List of th ...
Air conditioning system
Adjusting the settings
■ Adjusting the temperature setting
Turn the temperature control dial clockwise (warm) or counterclockwise (cool).
If is not pressed, the system will
blow ambient temperature air or heated air.
For quick cooling, turn the temperature control dial to the MAX A/C ...
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
If a trouble code is displayed during the DTC check, check the circuit listed
for the code in the table below (proceed to the page listed for that circuit).
1. Occupant Detection ECU
HINT:
When DTC B1650/32 is detected as a result of troubleshooting the Supplement ...
