EGR Boost Sensor: Testing and Inspection
EGR BOOST SENSOR INSPECTIONNOTE:
- Perform the following test only when directed.
- The following vacuum values are indicated by relative pressure from barometric pressure.
1. Disconnect the PCM connector.
2. Connect the SST (EMS adapter harness) between the PCM and the vehicle harness connectors.
3. Turn the ignition switch to ON.
CAUTION: Do not apply vacuum outside of the specified limits. Doing so will damage the EGR boost sensor.
4. Apply vacuum to the EGR boost sensor according to the following procedure.
5. Increase the applied vacuum from 0 kPa {0 mmHg, 0 inHg) to -81.3 kPa {-610 mmHg, -24.0 in Hg} and verify that the PCM terminal 3F 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}
6. 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)