7.10 CAN bus / Testmodes 7 ADDITIONAL ITEMS: BEYOND BASIC FUEL AND IGNITION CONTROL
6. With valid settings entered, the Start button should be active - click it.
7. When finished, click Stop.
If the coils get hot or your coil fuses pop, then you almost certainly have a basic settings mistake with output
polarity. Turn off power immediately and re-visit those settings.
The Coil testing mode called Sequence runs the coils in sequence up to the chosen coil. So if you have four
coils and selected Coil D and Sequence then the test mode will repeatedly fire Coil A, then Coil B, then Coil C,
then Coil D in turn. Note that the test mode does not allow dwell periods to overlap in the sequence mode, unlike
normal operation where the dwell periods overlap as required. (This is why traditional V8 distributor spark was
weak at high revs - there was not enough time to charge the single coil between sparks.)
7.10.14.3 Injectors The coil test mode is useful to confirm you have the injectors wired correctly and to exper-
iment with opening times, PWM settings or to measure flow rate if you have an injector test bench setup. (Using
flammable liquids while testing is hazardous and can lead to serious fires. Non-flammable injector test liquid is
available.)
If your injectors are fitted to the engine you MUST NOT run the test mode with fuel pressure, or you will
fill your engine with fuel! Remove the fuse from your fuel pump and depressurize the line first.
When semi-sequential is enabled, the injectors will fire in pairs. To test individually, temporarily set Sequential
to Off.
To enable injector testing:
1. Choose the desired output interval (the estimated RPM equivalent is shown below.)
2. Set Injector testing mode to One
3. Choose which injector to test e.g. Injector A
4. Choose your pulsewidth time in milliseconds.
5. If your injectors are powered via the fuel pump relay as is recommended, set the fuel pump to On.
6. For functional testing, set the total number of injections to 65535 (the maximum), or for flow testing use your
chosen number.
7. With valid settings entered, the Start button should be active - click it.
8. The number of injections gauge will count down and stop at zero.
9. To stop testing sooner, click Stop.
When you have finished using the test mode, close the test mode window and power off the MS3Pro. If you
disconnected you fuel pump, reconnect it now.
7.10.15 Output test mode - I/O
This allows you to test some of the on/off and pulsed outputs in a controlled manner. As with the other tests, be
cautious - this mode allows you complete control over the outputs; it is up to you to ensure that doesn’t cause any
damage. These are split into three screens. Screen 1 tests regular on/off and stepper IAC outputs, as well as
injector channels I and J. Screen 2 tests spark and injector outputs. The final screen tests CAN based I/O.
Be careful when using this output screen for testing spark outputs. Spark outputs behave “backwards”
in this test mode, supplying 5 volts when off and 0 volts when on. They will often remain at 5 volts after exiting
test mode until the ECU is switched off and back on again. Do not use this test mode with the ignition system
AMP EFI MS3Pro manual version 1.202, firmware 1.5.0, 4/21/2017 Page 273
To Next Page
Loading...