Tacoma

Toyota Tacoma 2015-2018 Air Conditioning Workshop Manual

4. INSPECT AIR CONDITIONING PRESSURE SENSOR (SENSOR SIGNAL CIRCUIT)
(a) Measure the voltage when the following conditions are satisfied.
ITEM CONDITION
Vehicle Doors Fully open
Temperature Setting MAX COLD
Blower Speed HI
A/C Switch On
R/F Switch Recirculation
Interior Temperature 25 to 35°C (77 to 95°F)
Engine Speed 2000 rpm
NOTICE:
I
f refrigerant pressure on the high pressure side becomes extremely high during the inspection (if the
voltage exceeds 4.8 V), the fail-safe function stops compressor operation. Therefore, measure the voltage
before the fail-safe operation.
It is necessary to measure the voltage for a certain amount of time (approximately 10 minutes) because
the malfunction may recur after a while.
HINT:
When the outside air temperature is low (below -1.5°C (29.3°F)), the compressor stops due to operation of
the ambient temperature sensor and the evaporator temperature sensor to prevent the evaporator from
freezing. In this case, perform the inspection in a warm indoor environment.
(1) Measure the voltage according to the value(s) in
the table
below.
Standard Voltage:
TESTER
CONNECTION
CONDITION SPECIFIED
CONDITION
A35-2 (PRE) - Body
ground
Refer to above "Procedure
Condition"
0.74 to 4.71 V
Text in Illustration
*a
Component with harness connected
(Air Conditioning Amplifier Assembly)
RESULT PROCEED
TO
OK (When troubleshooting according to the DTC) A
OK (When troubleshooting according to Problem
Symptoms Table)
B
NG C
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