Component Tests and General Diagnostics

Fuel Cut Control System Inspection

NOTE: This inspection has to perform after the Fuel Injector Operation Inspection.

If simulation function of WDS or equivalent is used:

1. Warm up the engine and idle it.
2. Connect the WDS or equivalent to DL.C-2.
3. Select the RPM and FUELPW1 PIDs.
4. Monitor the both PIDs while performing the following steps.
1. Depress the accelerator pedal and increase the RPM PID to 4,000 rpm.
2. Quickly release the accelerator pedal (brake pedal is not depressed) and verify that the FUELPW1 PID is 0 ms., and 2-5 ms. when the RPM PID drops below 1,200 rpm.
- If not as specified, inspect the following.
- ECT sensor and related harness.
- Neutral switch and related harness.
- Clutch switch and related harness.

If simulation function of WDS or equivalent is not used:

1. Warm up the engine and idle it.
2. Measure the fuel injector control signal wave profile using the oscilloscope 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 wave profile constant B+, and appears wave, when the engine speed drops below 2,200 rpm. (See PCM INSPECTION [LF].) PCM Inspection
- If not as specified, inspect the following:
- ECT sensor and related harness.
- Neutral switch and related harness (MT).
- Clutch switch and related harness (MT).
- TR switch and related wiring harness (AT) (See TRANSMISSION RANGE (TR) SWITCH INSPECTION [SJ6A-EL].)