#
BAROMETRIC PRESSURE SENSOR/EGR BOOST SENSOR INSPECTION [AJ]

BME014018210205

  Note

  • Perform the following test only when directed.

## Voltage Inspection

### Using the SST (104 pin breakout box)

1. Turn the ignition switch to LOCK.

2. Connect the WDS or equivalent to the DLC-2.

3. Turn the ignition switch to ON position (Engine OFF).

4. Select BARO PID on the WDS or equivalent.

5. Disconnect the vacuum hose between the EGR boost sensor and the EGR boost sensor solenoid valve.

6. Verify that BARO PID is within the specification.

  Note

  • The output voltage varies with the following condition.

  - Input voltage 4.5-5.5 V
  - Outside temperature 10-50 °C {50-122 °F}
  - Sea level -200-3,000 m {-656-9,840 ft}

  Specification
  Measurement voltage: 2.3-4.7 V

  Caution

  • Do not apply vacuum out of specification. Doing so will damage the EGR boost sensor.

7. Apply vacuum of -26.6 kPa {-200 mmHg, -7.85 inHg} to the EGR boost sensor and verify that BARO PID varies from Step 7 as specified.

  • If not as specified, perform the "Circuit Open/Short Inspection".

  Specification
  Voltage variation: 0.8-1.3 V

## Circuit Open/Short Inspection

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

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

### Open circuit

  • If there is no continuity, the circuit is open. Repair or replace the harness.
  - EGR boost sensor terminal C (harness-side) and PCM terminal 90
  - EGR boost sensor terminal B (harness-side) and PCM terminal 34
  - EGR boost sensor terminal A (harness-side) and PCM terminal 91

### Short circuit

  • If there is continuity, the circuit is shorted. Repair or replace the harness.
  - EGR boost sensor terminal C (harness-side) and power supply
  - EGR boost sensor terminal C (harness-side) and body ground
  - EGR boost sensor terminal B (harness-side) and power supply
  - EGR boost sensor terminal B (harness-side) and body ground
  - EGR boost sensor terminal A (harness-side) and power supply