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. Refer too PCM INSPECTION [SKYACTIV-G 2.5T] .)
  - If not as specified, inspect the following:
    - ECT sensor No. 1 and related wiring harness Refer too ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [SKYACTIV-G 2.5T] .)