Objective:
Check control and operation of the injector.
Measurement:
Injector control signal.
Preparation:
Engine oil temperature greater than 80°C . Switch off all electrical loads. Switch off the engine and ignition.
Connections:
| INPUT A | COM/TRIGGER | INPUT B |
|---|---|---|
| Connect the red measurement lead to the control wire of the connection plug of the injectors according to the table below. Connect the black ground lead to ground. |
| Engine | Control wire colour |
|---|---|
| F4R | Y9.1=GY, Y9.2=PK, Y9.3=BN, Y9.4=WH |
| Z10XEP | Terminal 2 |
| Z14XEP | Terminal 2 |
| Y22SE | Y9.1=GNWH, Y9.2=GNRD, Y9.3=GNOG, Y9.4=GN |
| Z20NET | L2A=BK, L2B=GNBK, L2C=PKBK, L2D=BUBK |
| 6VD1 | terminal A |
| Other engines | BNXX |
Procedure Tech 31:
- 1. Download Reference curve.
- 2. Start the engine and allow it to idle.
Note. For the Z16YNG engine it is important to switch the engine to petrol mode before the measurement is started.
Reference Curve:
This multi-point fuel injection system is a conventional fuel injection system with a cut-off control system. In this case, the signal plot only has one voltage spike.
If the voltage spikes vary considerably, the horizontal scaling factor can be increased to 500 micro-seconds/DIV to stabilise the display of the signal plot.
Procedure Tech 32:
- 1. Download Setup file (the Tech 32 uses only Setup files, no reference curves).
- 2. Start engine and allow it to idle.
Note. For the Z16YNG engine it is important to switch the engine to petrol mode before the measurement is started.
Setup File:
Reference Curve:
This multi-point fuel injection system is a conventional fuel injection system with a cut-off control system. In this case, the signal plot only has one voltage spike.
If the voltage spikes vary considerably, the horizontal scaling factor can be increased to 500 micro-seconds/DIV to stabilise the display of the signal plot.