RM35X0E _58 Vehicle Interior _079316 HEATING / AIR CONDITIONING _0384895 AIR CONDITIONING PRESSURE SENSOR G

HEATING / AIR CONDITIONING AIR CONDITIONING PRESSURE SENSOR ON-VEHICLE INSPECTION

PROCEDURE

Hide Display 88719A 1.INSPECT AIR CONDITIONER PRESSURE SENSOR (for Manual Air Conditioning System)

1.469,1.75 1.896,1.938 0.427,0.188 1.438,0.115 1.865,0.302 0.427,0.188 1.656,1.01 1.656,1.458 true 2.438,0.938 1.906,0.938 true 1.458,2.594 1.677,3.167 true 1.979,2.573 2.458,3.177 true 0.938,3.125 1.271,2.74 true 1.385,0.948 0.854,0.948 true 0.729,0.083 1.042,0.24 0.313,0.156 10 false *a 0.74,3.177 1.146,3.396 0.406,0.219 10 false SG-4 1.542,3.188 1.948,3.365 0.406,0.177 10 false PRE 2.344,3.198 2.802,3.385 0.458,0.188 10 false S5-3 1.552,1.76 1.885,1.99 0.333,0.229 10 false N41 1.531,0.135 1.865,0.365 0.333,0.229 10 false A37 0.719,0.875 0.875,1 0.156,0.125 10 false - 1.573,1.49 1.802,1.646 0.229,0.156 10 false PR 2.479,0.854 2.635,0.979 0.156,0.125 10 false + 0.76,1.688 1.073,1.844 0.313,0.156 10 false *b

*a	Front view of wire harness connector (Air Conditioner Pressure Sensor)
*b	Front view of wire harness connector (Air Conditioning Amplifier Assembly)

Check the wire harness.

Disconnect the A37 air conditioner pressure sensor connector.

ii.

Disconnect the N41 air conditioning amplifier assembly connector.

iii.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A37-1 (-) - N41-15 (SG-4)	Always	Below 1 Ω
A37-2 (PR) - N41-6 (PRE)	Always	Below 1 Ω
A37-3 (+) - N41-11 (S5-3)	Always	Below 1 Ω
A37-1 (-) - Body ground	Always	10 kΩ or higher
A37-2 (PR) - Body ground	Always	10 kΩ or higher
A37-3 (+) - Body ground	Always	10 kΩ or higher

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

Check the Voltage.

1.49,0.99 1.917,1.208 0.427,0.219 2.021,2.25 2.385,2.771 true 1.406,2.24 1.083,2.719 true 1.708,2.25 1.708,2.906 false 0.135,0.104 0.448,0.302 0.313,0.198 10 false *a 1.583,1.01 2.042,1.208 0.458,0.198 10 false A37 2.417,2.781 2.573,2.979 0.156,0.198 10 false + 1.646,2.958 1.958,3.156 0.313,0.198 10 false PR 1.052,2.708 1.208,2.906 0.156,0.198 10 false -

*a	Front view of wire harness connector (Air Conditioner Pressure Sensor)

Reconnect the A37 air conditioning amplifier assembly connector.

ii.

Turn the ignition switch to ON.

iii.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
A37-3 (+) - Body ground	Ignition switch ON	4.75 to 5.25 V

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

Check the air conditioner pressure sensor.

Connect the connector to the air conditioner pressure sensor.

ii.

Install a manifold gauge set.

iii.

Warm up the engine.

iv.

Turn the A/C switch on.

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
*Value when sensor power source voltage is 5 V
N41-6 (PRE) - N41-15 (SG-4)	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))	0.62 to 4.73 V*
N41-6 (PRE) - N41-15 (SG-4)	Refrigerant pressure: Abnormal pressure (below 176 kPa (1.8 kgf/cm², 26 psi), or 3025 kPa (30.8 kgf/cm², 439 psi) or higher)	Below 0.85 V, or 4.50 V or higher*

3.396,0.208 3.833,0.427 0.438,0.219 3.323,1.469 3.615,2.292 true 2.656,0.469 2.917,0.469 2.917,0.469 3.208,1.292 true 3.5,0.24 3.958,0.438 0.458,0.198 10 false N41 3.5,2.302 4.115,2.5 0.615,0.198 10 false SG-4 2.333,0.396 2.948,0.594 0.615,0.198 10 false PRE 0.063,0.063 0.375,0.26 0.313,0.198 10 false *a

Component with harness connected
(Air Conditioning Amplifier Assembly)

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

Hide Display 88719A 2.INSPECT AIR CONDITIONER PRESSURE SENSOR (for Automatic Air Conditioning System)

1.469,1.74 1.896,1.927 0.427,0.188 1.438,0.115 1.865,0.302 0.427,0.188 1.656,1.01 1.656,1.458 true 2.438,0.938 1.906,0.938 true 1.448,2.594 1.677,3.135 true 1.99,2.594 2.479,3.115 true 0.865,3.135 1.271,2.729 true 1.385,0.948 0.854,0.948 true 0.729,0.083 1.042,0.24 0.313,0.156 10 false *a 0.688,3.156 1.094,3.375 0.406,0.219 10 false SG-4 1.542,3.167 1.948,3.344 0.406,0.177 10 false PRE 2.375,3.156 2.833,3.344 0.458,0.188 10 false S5-3 1.552,1.76 1.885,1.99 0.333,0.229 10 false N43 1.531,0.135 1.865,0.365 0.333,0.229 10 false A37 0.719,0.875 0.875,1 0.156,0.125 10 false - 1.573,1.49 1.802,1.646 0.229,0.156 10 false PR 2.479,0.854 2.635,0.979 0.156,0.125 10 false + 0.25,1.594 0.563,1.75 0.313,0.156 10 false *b

*a	Front view of wire harness connector (Air Conditioner Pressure Sensor)
*b	Front view of wire harness connector (Air Conditioning Amplifier Assembly)

Check the wire harness.

Disconnect the A37 air conditioner pressure sensor connector.

ii.

Disconnect the N43 air conditioning amplifier assembly connector.

iii.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A37-1 (-) - N43-15 (SG-4)	Always	Below 1 Ω
A37-2 (PR) - N43-6 (PRE)	Always	Below 1 Ω
A37-3 (+) - N43-11 (S5-3)	Always	Below 1 Ω
A37-1 (-) - Body ground	Always	10 kΩ or higher
A37-2 (PR) - Body ground	Always	10 kΩ or higher
A37-3 (+) - Body ground	Always	10 kΩ or higher

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

Check the Voltage.

*a	Front view of wire harness connector (Air Conditioner Pressure Sensor)

Reconnect the A37 air conditioning amplifier assembly connector.

ii.

Turn the ignition switch to ON.

iii.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
A37-3 (+) - Body ground	Ignition switch ON	4.75 to 5.25 V

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

Check the air conditioner pressure sensor.

Connect the connector to the air conditioner pressure sensor.

ii.

Install a manifold gauge set.

iii.

Warm up the engine.

iv.

Turn the A/C switch on.

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
*Value when sensor power source voltage is 5 V
N43-6 (PRE) - N43-15 (SG-4)	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))	0.62 to 4.73 V*
N43-6 (PRE) - N43-15 (SG-4)	Refrigerant pressure: Abnormal pressure (below 176 kPa (1.8 kgf/cm², 26 psi), or 3025 kPa (30.8 kgf/cm², 439 psi) or higher)	Below 0.85 V, or 4.50 V or higher*

3.156,0.313 3.552,0.531 0.396,0.219 4.5,0.448 4.198,0.448 4.198,0.448 3.938,1.292 true 4.031,1.479 4.365,2.365 true 3.24,0.333 3.698,0.531 0.458,0.198 10 false N43 4.26,2.385 4.875,2.583 0.615,0.198 10 false SG-4 4.531,0.375 4.99,0.573 0.458,0.198 10 false PRE 0.083,0.042 0.396,0.24 0.313,0.198 10 false *a

Component with harness connected
(Air Conditioning Amplifier Assembly)

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