Fuel Cut Control System Inspection

NOTE:

This inspection has to be performed after the Fuel Injector Operation Inspection.

If data monitor 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 the FUELPW PIDs. (See ON-BOARD DIAGNOSTIC TEST [PCM (VIN Y)] ).
Monitor 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 FUELPW PID is 0 msec, and 2-5 msec when the RPM PID drops below 1, 200 RPM.
- If not as specified, inspect the following:
  - ECT sensor and related wiring harness (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION ).

If data monitor 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:
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 the wave appears when the engine speed drops below 1, 200 RPM. (See PCM INSPECTION ).
  - If not as specified, inspect the following:
    - ECT sensor and related wiring harness (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION ).