Fuel Cut Control System Inspection

If simulation function of M-MDS is used: 

1. Warm up the engine and idle it.
2. Connect the M-MDS to the DLC-2.
3. Select the RPM and FUEL PW1 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 FUEL PW1 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 [LF] .)
        • Neutral switch and related harness (See NEUTRAL SWITCH INSPECTION [LF] .)
        • CPP and related harness (See CLUTCH PEDAL POSITION (CPP) SWITCH INSPECTION [LF] .)

If simulation function of M-MDS 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] .)
      • If not as specified, inspect the following:
        • ECT sensor and related harness (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [LF] .)
        • Neutral switch and related harness (See NEUTRAL SWITCH INSPECTION [LF] .)
        • CPP and related harness (See CLUTCH PEDAL POSITION (CPP) SWITCH INSPECTION [LF] .)
        • TR switch and related wiring harness (AT) (See TRANSMISSION RANGE (TR) SWITCH INSPECTION [SJ6A-EL] .)