Fuel Cut Control Unit: Testing and Inspection

Fuel Cut Control System Inspection

1. Warm up engine and idle it.
2. Turn off the electrical loads and A/C switch.
3. Connect WDS or equivalent to the DLC-2.
4. Select RPM PID.
5. Listen for the fuel injector operation sound at all cylinders using the sound scope and monitor both PIDs while performing the following steps:
1. Depress the accelerator pedal and increase the engine speed to 4,000 rpm.
2. Quickly release the accelerator pedal (brake pedal is not depressed) and verify that the fuel injector operation sound stops, and starts again when the engine speed drops below 1,200 rpm.
- If not as specified, inspect the following:
- ECT sensor and related harness
- Neutral/clutch pedal position switch and related harness (MTX)
- TR switch and related harness (ATX) (See TRANSAXLE RANGE (TR) SWITCH INSPECTION [FN4A-EL].