PINPOINT TEST G258127p35

Pinpoint Tests

PINPOINT TEST G258127p35 : DTC P0532, P0533; AIR CONDITIONING PRESSURE SENSOR CIRCUIT LOW/HIGH VOLTAGE

G258127t158 : CHECK THE A/C PRESSURE SENSOR SENSING CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the battery negative terminal.
2. Disconnect the A/C pressure sensor electrical connector, EC11
3. Disconnect the ECM electrical connector, PI01.
4. Measure the resistance between EC11, pin 02 (WU) and PI01, pin 121 (WU).

- Is the resistance greater than 5 Ohms?

->YES
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.

->NO
GO to Pinpoint Test G258127t159.

G258127t159 : CHECK THE A/C PRESSURE SENSOR SENSING CIRCUIT FOR SHORT TO HIGH VOLTAGE
1. Reconnect the ECM electrical connector, PI01.
2. Reconnect the battery negative terminal.
3. Turn the ignition switch to the ON position.
4. Measure the voltage between EC11, pin 02 (WU) and GROUND.

- Is the voltage greater than 3 volts?

->YES
REPAIR the short circuit to high voltage. CLEAR the DTC. TEST the system for normal operation.

->NO
GO to Pinpoint Test G258127t160.

G258127t160 : CHECK THE A/C PRESSURE SENSOR SENSING CIRCUIT FOR SHORT TO GROUND
1. Turn the ignition switch to the OFF position.
2. Measure the resistance between EC11, pin 02 (WU) and GROUND.

- Is the resistance less than 10,000 Ohms?

->YES
REPAIR the short circuit to GROUND. CLEAR the DTC. TEST the system for normal operation.

->NO
INSTALL a new A/C pressure sensor.