Toyota CH-R Service Manual: On-vehicle Inspection

Toyota CH-R Service Manual / Heating / Air Conditioning / Air Conditioning Pressure Sensor / On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT AIR CONDITIONER PRESSURE SENSOR (for DENSO Made)

(a) Check the wire harness.

(1) Disconnect the A22 air conditioner pressure sensor connector.

(2) Disconnect the F71 air conditioning amplifier assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A22-1 (-) - F71-2 (SG-2)

Always

Below 1 Ω

A22-2 (PR) - F71-24 (PRE)

Always

Below 1 Ω

A22-3 (+) - F71-6 (S5-3)

Always

Below 1 Ω

A22-1 (-) or F71-2 (SG-2) - Body ground

Always

10 kΩ or higher

A22-2 (PR) or F71-24 (PRE) - Body ground

Always

10 kΩ or higher

A22-2 (PR) or F71-24 (PRE) - Body ground

Always

10 kΩ or higher

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

*a

Component without harness connected

(Air Conditioner Pressure Sensor)

*b

Component without harness connected

(Air Conditioning Amplifier Assembly)

(4) Reconnect the F71 air conditioning amplifier assembly connector.

(5) Ignition switch ON.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A22-3 (+) - Body ground

Ignition switch ON

4.75 to 5.25 V

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

*a

Component without harness connected

(Air Conditioner Pressure Sensor)

(b) Check the air conditioner pressure sensor.

(1) Connect the connector to the air conditioner pressure sensor.

(2) Install a manifold gauge set.

(3) Turn the A/C switch on.

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

HINT:

Check from the rear of the connector while it is connected to the air conditioning amplifier assembly.

Standard Voltage:

Tester Connection

Condition

Specified Condition

F71-24 (PRE) -F71-2 (SG-2)

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))

0.74 to 4.61 V

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

*a

Component with harness connected

(Air Conditioning Amplifier Assembly)

2. INSPECT AIR CONDITIONER PRESSURE SENSOR (for VALEO Made)

(a) Check the wire harness.

(1) Disconnect the A52 air conditioner pressure sensor connector.

(2) Disconnect the F72 air conditioning amplifier assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A52-3 (-) - F72-32 (SG-2)

Always

Below 1 Ω

A52-2 (PR) - F72-33 (PRE)

Always

Below 1 Ω

A52-1 (+) - F72-34 (S5-3)

Always

Below 1 Ω

A52-1 (+) - Body ground

Always

10 kΩ or higher

A52-2 (PR) - Body ground

Always

10 kΩ or higher

A52-3 (SG-2) - Body ground

Always

10 kΩ or higher

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

*a

Component without harness connected

(Air Conditioner Pressure Sensor)

*b

Component without harness connected

(Air Conditioning Amplifier Assembly)

(4) Reconnect the F72 air conditioning amplifier assembly connector.

(5) Ignition switch ON.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A52-1 (+) - Body ground

Ignition switch ON

4.75 to 5.25 V

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

*a

Component without harness connected

(Air Conditioner Pressure Sensor)

(b) Check the air conditioner pressure sensor.

(1) Install a manifold gauge set.

(2) Connect the A52 air conditioner pressure sensor connector.

(3) Start the engine.

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

*a

Component with harness connected

(Air Conditioning Amplifier Assembly)

-

-

Standard Voltage:

Tester Connection

Condition

Specified Condition

F72-33 (PRE) - F72-32 (SG-2)

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.

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