EGR Boost Sensor: Testing and Inspection
EGR BOOST SENSOR INSPECTIONNOTE:
- Perform the following inspection only when directed.
- The following vacuum values are indicated by relative pressure from the EGR boost sensor.
Voltage Inspection
1. Connect the WDS or equivalent to the DLC-2.
2. Turn the ignition switch to ON position.
3. Select BARO PID on the WDS or equivalent.
4. Verify that the BARO PID (pressure) and barometric pressure are practically equal.
- If as verified, go to next step.
- If not as verified, perform the "Circuit Open/Short Inspection".
CAUTION: Do not apply vacuum out of specification.
Doing so will damage the EGR boost sensor.
5. Apply vacuum of -25.0 kPa {-187 mmHg, -7.38 inHg} to the EGR boost sensor, and verify that the BARO PID variation from that of Step 4 is approx. 25.0 kPa {187 mmHg, 7.38 inHg}.
- If as verified, replace the EGR boost sensor.
- If not as verified, perform the "Circuit Open/Short inspection".
Circuit Open/Short Inspection
1. Disconnect the PCM connector.
2. Inspect the following harness for open or short circuit. (Continuity check)
Open circuit
- EGR boost sensor terminal A (harness-side) and PCM terminal 34 (harness-side)
- EGR boost sensor terminal B (harness-side) and PCM terminal 91 (harness-side)
- EGR boost sensor terminal C (harness-side) and PCM terminal 90 (harness-side)
Short circuit
- EGR boost sensor terminal A (harness-side) and power supply
- EGR boost sensor terminal A (harness-side) and body GND
- EGR boost sensor terminal B (harness-side) and power supply
- EGR boost sensor terminal C (harness-side) and power supply
- EGR boost sensor terminal C (harness-side) and body GND