Using the SST (NGS Tester)

NOTE:
- Perform the following test only when directed.
- The following vacuum values are indicated by relative pressure from atmospheric pressure.




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

CAUTION: Do not apply a vacuum outside the specified limits. Doing so will damage the fuel tank pressure sensor.




5. Disconnect the vacuum hose between the EGR boost sensor and intake manifold.

NOTE: The output voltage varies with the measuring condition.

6. Verify that the voltage at BARO V is within specification.

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
BARO V variation: 2.3 - 4.7 V

7. Then apply the vacuum of -26.6 kPa {-200 mmHg, -7.85 inHg} to EGR boost sensor and verify that BARO V from Step 6 is within specification.
- If not as specified, replace the EGR boost sensor.
- If EGR boost sensor is okay, but PID value is out of specification, carry out the "Circuit Open/Short Inspection".

Specification:
BARO V variation: 0.8 - 1.3 V

Circuit Open/Short Inspection
1. Remove the PCM.




2. Connect the SST (104 Pin Breakout Box) to the PCM as shown.
3. Tighten the connector attaching screw.

Tightening torque
7.9 - 10.7 N.m {80 - 110 kgf.cm, 89.5 - 95.4 in.lbf}




4. Inspect for an open or short circuit in the following wiring harnesses by probing the applicable sensor and SST (104 Pin Breakout Box) terminals with ohmmeter leads.
- If there is an open or short circuit, repair or replace wiring harnesses.
- If there is no open or short circuit, replace the EGR boost sensor.

Open circuit
- EGR boost (Barometric pressure) signal circuit (EGR boost sensor connector terminal A and PCM connector terminal 34)
- Reference voltage circuit (EGR boost sensor connector terminal C and PCM connector terminal 90)
- GND circuit (EGR boost sensor connector terminal B and PCM connector terminal 91)

Short circuit
- EGR boost (Barometric pressure) signal circuit (EGR boost sensor connector terminal A and PCM connector terminal 34)
- Reference voltage circuit (EGR boost sensor connector terminal C and PCM connector terminal 90)

5. Reconnect the EGR boost sensor connector.