Atmospheric Pressure Sensor (Pa Sensor)
- Disconnect harness connector from the control unit and connect system checker harness to control unit and wire harness connector. Turn ignition switch on.
- Connect digital voltmeter positive probe to C9 terminal of system checker harness and negative probe to C12 terminal. There should be 2.76-2.96 volts.
- If voltages are out of range, check for open or short circuit between ECU and atmospheric pressure sensor. Replace sensor if necessary.