Using the SST (NGS Tester)
NOTE:- Perform the following test only when directed.
- The following vacuum values are indicated by relative pressure from barometric pressure.
1. Connect the SST (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 "FTP volts" on the NGS tester display and press START. The NGS tester measure and shows the voltage.
4. Turn the ignition switch on.
CAUTION: Do not apply a vacuum outside of 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 volts" voltage decreases accordingly as specified.
Specification
- If not as specified, replace the fuel tank pressure sensor.
- If fuel tank pressure sensor is okay, but PID value is out of specification, inspect as follows.
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 Nm (80 - 110 kg.cm, 69.5 - 95.4 in.lb)
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 fuel tank pressure sensor.
Open circuit
- Fuel tank pressure signal circuit (Fuel tank pressure sensor connector terminal B and PCM connector terminal 62)
- Reference voltage circuit (Fuel tank pressure sensor connector terminal C and PCM connector terminal 90)
- Ground circuit (Fuel tank pressure sensor connector terminal A and PCM connector terminal 91)
Short circuit
- Fuel tank pressure signal circuit (Fuel tank pressure sensor connector terminal B and PCM connector terminal 62)
- Reference voltage circuit (Fuel tank pressure sensor connector terminal C and PCM connector terminal 90)
7. Reconnect the fuel tank pressure sensor connector.