BAROMETRIC PRESSURE (BARO) SENSOR INSPECTION [ZJ, ZY, Z6]

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With BARO Sensor Only

Note

•  Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flowchart. (See HOW TO USE THIS MANUAL.)

Voltage Inspection

1.  Remove the BARO sensor with the connector still connected.

2.  Remove the vacuum hose of the BARO sensor.

3.  Verify that the BARO sensor output voltage (M-MDS PID: BARO) is within the specification when the ignition switch is turned to the ON position. (See PCM INSPECTION [ZJ, ZY, Z6].)

•  If not within the specification, replace the BARO sensor.

4.  Install the vacuum pump.

5.  Turn the ignition switch to the ON position.

6.  Verify that change in voltage is within the specification when a vacuum of 30 kPa {225 mmHg, 8.86 inHg} is applied using a vacuum pump.

•  If not within the specification, replace the BARO sensor.

•  If the monitor item condition/specification (reference) is not within the specification, even though there is no malfunction, perform the “Circuit Open/Short Inspection“.

Circuit Open/Short Inspection

1.  Remove the PCM connector cover.

2.  Disconnect the PCM connector. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [ZJ, ZY, Z6].)

3.  Inspect the following wiring harness for open or short circuit (Continuity inspection).

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Open circuit

•  If there is no continuity, there is an open circuit. Repair or replace the wiring harness.

―  BARO sensor terminal C and PCM terminal 2W

―  BARO sensor terminal A and PCM terminal 2AX

―  BARO sensor terminal B and PCM terminal 2S

Short circuit

•  If there is continuity, there is a short circuit. Repair or replace the wiring harness.

―  BARO sensor terminal C and body ground

―  BARO sensor terminal A and power supply

―  BARO sensor terminal B and body ground

―  BARO sensor terminal B and power supply