Mazda 6 manuals

Mazda 6 Service Manual: Barometric pressure (baro) sensor inspection

Mazda 6 Service Manual / Fuel and emission control systems / Control system / Barometric pressure (baro) sensor inspection

Note

1. Connect the SSTs

(WDS or equivalent) to the DLC-2.

2. Turn the ignition switch to ON.

3. Select BARO on the SSTs

(WDS or equivalent).

4. Verify that the BARO PID (pressure) and barometric pressure are practically equal.

- If there is no open or short circuit, replace the barometric pressure sensor.

5. Apply vacuum of -25.0 kPa {-187 mmHg, -7.38 inHg}

to the barometric pressure sensor, and verify that the BARO variation from that of Step 4 is approx. 25.0 kPa {187 mmHg, 7.38 inHg}.

- If there is no open or short circuit, replace the barometric pressure sensor.

Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION.)


2. Inspect the following wiring harness for open or short. (Continuity check)

Open circuit

- Barometric pressure sensor terminal A (harness-side) and PCM terminal 1G

- Barometric pressure sensor terminal B (harness-side) and PCM terminal 2H

- Barometric pressure sensor terminal C (harness-side) and PCM terminal 2K

Short circuit

- Barometric pressure sensor terminal C (harness-side) and power supply.

- Barometric pressure sensor terminal C (harness-side) and body GND.

- Barometric pressure sensor terminal A (harness-side) and power supply.

- Barometric pressure sensor terminal A (harness-side) and body GND

Neutral switch inspection
Note Perform the following inspection only when directed. Continuity Inspection 1. Disconnect the negative battery cable. 2. Remove the neutral switch.J5 MANUAL TRANSAXLE REMOVAL/INSTALLATION ...

On-board diagnostic
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