Fuel Cut Control System Inspection
NOTE:
- This inspection has to perform after the Fuel Injector Operation Inspection.
If simulation function of M-MDS is used:
- Warm up the engine and idle it.
- Connect the M-MDS to the DLC-2.
- Select the RPM and FUELPW1 PIDs.
- Monitor the both PIDs while performing the following steps.
- Depress the accelerator pedal and increase the RPM PID to 4, 000 rpm.
- 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 (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION ).
- Neutral switch and related harness (See NEUTRAL SWITCH INSPECTION ).
- CPP and related harness (See CLUTCH PEDAL POSITION (CPP) SWITCH INSPECTION ).
- If not as specified, inspect the following:
If simulation function of M-MDS is not used:
- Warm up the engine and idle it.
- Measure the fuel injector control signal wave profile using the oscilloscope while performing the following steps.
- Depress the accelerator pedal and increase the engine speed to 4, 000 rpm.
- 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
).
- If not as specified, inspect the following:
- ECT sensor and related harness (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION ).
- Neutral switch and related harness (See NEUTRAL SWITCH INSPECTION ).
- CPP and related harness (See CLUTCH PEDAL POSITION (CPP) SWITCH INSPECTION ).
- TR switch and related wiring harness (AT) (See TRANSMISSION RANGE (TR) SWITCH INSPECTION ).
- If not as specified, inspect the following: