Air conditioner pressure switch
Inspection
AIR CONDITIONER
AIR CONDITIONER PRESSURE SWITCH
ON-VEHICLE INSPECTION
1. Inspection of air conditioner pressure switch
(1) Inspection of vehicle wiring harness
(a) Disconnect the connector of air conditioner pressure switch.
(b) Measure the resistance between connector terminals at the vehicle wire harness side of the air conditioner pressure switch.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
|---|---|---|
| 2 (E) - Chassis ground |
Always |
Less than 1 Ω |
| 2 (E) - 4 (B) |
IG ON |
Less than 1 Ω |
Captions in illustration
| *a |
Connector not connected (Air conditioner pressure switch) |
(2) Inspection of air conditioner pressure switch
(a) Attach the air conditioner tool set.
(b) Apply the pressure listed in the table below to the sensor, and measure the resistance between terminals.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
|---|---|---|
| 2 (E) - 3 (ACP) |
Release of sensor (Pressure to sensor: 0 kPa) |
10 MΩ or more |
| 2 (E) - 3 (ACP) |
Apply the pressure of 1520 kPa {15.50kg/cm2, 220.4 psi} or more to the sensor. |
Less than 1 Ω |
| 1 (AC) - 4 (ACP) |
Release of sensor (Pressure to sensor: 0 kPa) |
10 MΩ or more |
| 1 (AC) - 4 (ACP) |
Apply the pressure of 22.5 kPa {0.23 kg/cm2, 3.26 psi} or more to less than 3140 kPa {32.02 kg/cm2, 455.3 psi} to the sensor. |
Less than 1 Ω |
| 1 (AC) - 4 (ACP) |
Apply the pressure of 3140 kPa {32.02 kg/cm2, 455.3 psi} or more to the sensor. |
10 MΩ or more |
Captions in illustration
| *a |
Sensor |