Toyota Tacoma manuals

Toyota Tacoma (2015-2018) Service Manual: On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT AIR CONDITIONER PRESSURE SENSOR (for Automatic Air Conditioning System)

(a) Check the wire harness.

(1) Disconnect the A34 air conditioner pressure sensor connector.

(2) Disconnect the A35 and A36 air conditioning amplifier assembly connector.

(3) Measure the resistance according to the value(s) in the table below.

Text in Illustration

*a

Front view of wire harness connector

(to Air Conditioner Pressure Sensor)

*b

Front view of wire harness connector

(to Air Conditioner Amplifier Assembly)

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

A34-1 (-) - A36-28 (SG-8)

Always

Below 1 Ω

A34-2 (PR) - A35-2 (PRE)

Always

Below 1 Ω

A34-3 (+) - A36-12 (S5-1)

Always

Below 1 Ω

A34-1 (-) - Body ground

Always

10 kΩ or higher

A34-2 (PR) - Body ground

Always

10 kΩ or higher

A34-3 (+) - Body ground

Always

10 kΩ or higher

If the resistance is not as specified, repair the wire harness.

(4) Connect the A35 and A36 air conditioning amplifier assembly connector.

(5) Measure the voltage according to the value(s) in the table below.

Text in Illustration

*a

Component without harness connected

(to Air Conditioner Pressure Sensor)

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

A34-3 (+) - Body ground

IG ON

4.75 to 5.25 V

If the voltage is not as specified, repair the wire harness or replace the air conditioning amplifier assembly.

(b) Check the air conditioner pressure sensor.

(1) Install a manifold gauge set.

(2) Connect the A34 air conditioner pressure sensor connector.

(3) Warm up the engine.

(4) A/C switch on.

(5) Measure the voltage according to the value(s) in the table below.

Text in Illustration

*a

Component without harness connected

(to Air Conditioner Pressure Sensor)

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

A35-2 (PRE) - A36-12 (S5-1)

Refrigerant pressure:

Normal pressure (less than 3025 kPa (30.8 kgf/ cm2, 439 psi) and more than 176 kPa (1.8 kgf/cm2, 26 psi))

0.63 to 4.72 V

If the voltage is not as specified, replace the air conditioner pressure sensor.

2. INSPECT AIR CONDITIONER PRESSURE SENSOR (for Manual Air Conditioning System)

(a) Check the wire harness.

(1) Disconnect the A34 air conditioner pressure sensor connector.

(2) Disconnect the A14 air conditioning amplifier assembly connector.

(3) Measure the resistance according to the value(s) in the table below.

Text in Illustration

*a

Front view of wire harness connector

(to Air Conditioner Pressure Sensor)

*b

Front view of wire harness connector

(to Air Conditioner Amplifier Assembly)

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

A34-1 (-) - A14-33 (SG-1)

Always

Below 1 Ω

A34-2 (PR) - A14-5 (PRE)

Always

Below 1 Ω

A34-3 (+) - A14-8 (S5-1)

Always

Below 1 Ω

A34-1 (-) - Body ground

Always

10 kΩ or higher

A34-2 (PR) - Body ground

Always

10 kΩ or higher

A34- 3(+) - Body ground

Always

10 kΩ or higher

If the resistance is not as specified, repair the wire harness.

(4) Connect the A14 air conditioning amplifier assembly connector.

(5) Measure the voltage according to the value(s) in the table below.

Text in Illustration

*a

Component without harness connected

(to Air Conditioner Pressure Sensor)

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

A34-3 (+) - Body ground

IG ON

4.75 to 5.25 V

If the voltage is not as specified, repair the wire harness or replace the air conditioning amplifier assembly.

(b) Check the air conditioner pressure sensor.

(1) Install a manifold gauge set.

(2) Connect the A34 air conditioner pressure sensor connector.

(3) Warm up the engine.

(4) A/C switch on.

(5) Measure the voltage according to the value(s) in the table below.

Text in Illustration

*a

Component without harness connected

(to Air Conditioner Pressure Sensor)

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

A14-5 (PRE) - A14-8 (S5-1)

Refrigerant pressure:

Normal pressure (less than 3025 kPa (30.8 kgf/ cm2, 439 psi) and more than 176 kPa (1.8 kgf/cm2, 26 psi))

0.63 to 4.72 V

If the voltage is not as specified, replace the air conditioner pressure sensor.

Installation
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Removal
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