Using the NGS Tester

1. Connect the SSTs (NGS tester) to the data link connector.
2. Select the "PID/DATA MONITOR AND RECORD" function on the NGS tester display and press TRIGGER.
3. Select "DPFEGR" on the NGS tester display and press START The NGS tester measures and shows the voltage.

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

4. Disconnect the vacuum hose between the EGR boost sensor and intake manifold.
5. Verify that the PID status is as specified.

Measuring 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: 2.3 - 4.7 V




6. Then apply the vacuum of -26.6 kPa {200 mmHg, -7.85 in Hg} to EGR boost sensor and verify that the PID status from Step 6 changes as specified.
- If not as specified, inspect the following harness continuity and terminal voltage.
- If PID status is correct and there is harness continuity, replace the EGR boost sensor.

Specification: PID status variation: 1.0 - 1.3 V




a. Harness continuity
- Between PCM terminal 34 and EGR boost sensor terminal A
- Between PCM terminal 91 and EGR boost sensor terminal B
- Between PCM terminal 90 and EGR boost sensor terminal C

b. Terminal voltage (Ignition switch ON)
- EGR boost sensor terminal B voltage:
Below 1.0 V (constant)
- EGR boost sensor terminal C voltage:
Approx. 5.0 V