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.
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 [L3 WITH TC] .)
  - If not as specified, inspect the following.
    - ECT sensor and related wiring harness
      (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [L3 WITH TC] .)
    - Neutral switch and related wiring harness
      (See NEUTRAL SWITCH INSPECTION [L3 WITH TC] .)
    - Clutch switch and related wiring harness
      (See CLUTCH PEDAL POSITION (CPP) SWITCH INSPECTION [L3 WITH TC] .)