Using the NGS Tester

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




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 "FTP V" on the NGS tester display and press START. The NGS tester measures and shows the voltage.
4. Turn the ignition switch to ON.

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




5. Apply pressure then a vacuum to the fuel tank pressure sensor according to the following procedure.

NOTE: The output voltage varies with the measuring condition.




6. Decrease the applied pressure from +6.66 kPa { + 50 mmHg, +1.97 inHg} to -6.66 kPa {-50 mmHg, -1.97 inHg} and verify that the "FTP V" voltage decreases accordingly as specified.
- If not as specified, inspect the following harness continuity and terminal voltage.




a. Harness continuity
- Between PCM terminal 91 and fuel tank pressure sensor terminal A
- Between PCM terminal 62 and fuel tank pressure sensor terminal B
- Between PCM terminal 90 and fuel tank pressure sensor terminal C
- If there is no continuity, repair or replace related harness.

b. Terminal voltage (Ignition switch ON)
- Fuel tank pressure sensor terminal A voltage:
Ground (below 1.0 V)
- Fuel tank pressure sensor terminal C voltage:
Constant voltage (4.5 - 5.5 V)
- If terminal voltage is incorrect, check the PCM.

7. If terminal voltage is correct and if there is harness continuity, replace the fuel tank pressure sensor.