EGR Boost Sensor: Testing and Inspection

NOTE: The following vacuum values are indicated by relative pressure from atmospheric pressure.




1. Connect the SSTs (NGS) to the DLC-2.
2. Select the "PID/DATA MONITOR AND RECORD" function on the NGS display.
3. Select "BARO V" on the NGS display and press START. The NGS measures and shows the voltage.
4. Turn the ignition switch to ON.

CAUTION: Do not apply vacuum outside of the specified limits. Doing so will damage the EGR boost sensor.




5. Apply vacuum to the EGR boost sensor according to the following procedure.

6. Increase the applied vacuum from 0 kPa {0 mmHg, 0 inHg} to -81.3 kPa {-610 mmHg, - 24.0 inHg} and verify that the "BARO V" voltage decreases accordingly.
- If terminal voltage is correct and there is harness continuity, replace the EGR boost sensor.
- If not as specified, go to next step.

Reference data





NOTE:
- The output voltage varies with the following condition.
- Input voltage: 5.0 V
- Atmospheric pressure: 101 kPa {760 mmHg, 29.9 inHg}
- Outside temperature: 25° C {77° F}




7. Carry out the following steps.
1. Harness continuity inspection
- Between PCM terminal 3F and EGR boost sensor terminal A
- Between PCM terminal 3AB and EGR boost sensor terminal B
- Between PCM terminal 3A and EGR boost sensor terminal C

2. Terminal voltage inspection (Ignition switch ON)
- EGR boost sensor terminal B voltage:
Ground (Less than 1.0 V)
- EGR boost sensor terminal C voltage:
Constant voltage (4.5 - 5.5 V)