Mirage L4-1795cc 1.8L SOHC 16 Valve (1995)
Fuel Injector: Oscilloscope Patterns and Waveforms
WAVE PATTERN INSPECTION USING AN ANALYZER
Measurement Method
1. Disconnect the injector connector and connect the special tool (test harness: MB991 348) in between. (Both the terminal on the engine control
module side and the terminal on the power supply side should be connected.)
2. Connect the analyzer special patterns pickup to the test harness clip on the engine control module side.
Alternate Method (test Harness Not Available)
1. Connect the analyzer special patterns pickup to ECM terminal No. 1 No. 2, No. 14 or No. 15.
WAVE PATTERN OBSERVATION POINTS
Point A : Height of injector coil induced voltage
Point B : Injector drive time
- The injector drive time will be synchronized with the scan tool display.
- When the engine is suddenly raced, the drive time will be greatly extended at first, but the drive time will soon match the engine speed.
