EGR Boost Sensor: Testing and Inspection

EGR BOOST SENSOR INSPECTION [AJ]

NOTE:
- 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 the 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 verified, go to next step.
- If not 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 verified, replace the EGR boost sensor.
- If not verified, perform the "Circuit Open/Short inspection".

Circuit Open/Short Inspection




1. Disconnect the PCM connector.
2. Inspect the following harnesses for open or short circuit. (Continuity check)

Open circuit
- EGR boost sensor terminal A and PCM terminal 1AL
- EGR boost sensor terminal B and PCM terminal 1BD
- EGR boost sensor terminal C and PCM terminal 1AZ

Short circuit
- EGR boost sensor terminal A and power supply
- EGR boost sensor terminal A and body ground
- EGR boost sensor terminal B and power supply
- EGR boost sensor terminal C and power supply
- EGR boost sensor terminal C and body ground