Fuel System Inspection

1. Connect the SSTs (NGS) to the data link connector-2.
2. Warm up the engine to normal operating temperature and let it idle.
3. Select the PID/DATA MONITOR AND RECORD function of the NGS.
4. With no electrical load operating, select "INJ R" and "INJ L" on the NGS display. NGS measures and shows the fuel injector pulse widths.
5. Increase the engine speed and verify that the pulse width changes.
6. If signal cannot be detected, or shows no change, check voltage at following terminals.
- PCM terminal 3E (Mass air flow sensor)
- PCM terminal 4AH, 4AL (Crankshaft position sensor).