The following resources have been obtained while installing VEMS on Toyota 4A-GE 16V & 20V engines.
VehicleFitment/Toyota/Injectors
VehicleFitment/Toyota/Triggers
VehicleFitment/Toyota/IdleAirController
Toyota 24+4 Trace:
Recorded as a Wav file and displayed in Audacity trace.
Testing on the bench with: Recorded trigger as a wav works okay, testing distributor driven by a motor works fine. Testing with the trigger in the car through the loom does not give an RPM reading.
Config & Tables
http://vems.hu/www.vems.co.uk/VEMSTrigger/config.txt
http://vems.hu/www.vems.co.uk/VEMSTrigger/tables.txt
Connection Details
The Ne (24tooth) trigger is connected to Trig1, the G1 (4 tooth) trigger is connected to Trig2. The G- combined ground connects to the common grounds. Two 270Ohm resistors pull the signal down to ground.
Trigger Logs
Initial test:
http://vems.hu/www.vems.co.uk/VEMSTrigger/24+4InCarTrig.txt
Test with the Ne and G1 trigger inputs changed over Ge to primary trigger, Ne to secondary trigger - we were out of clues so we thought we'd try it...
http://vems.hu/www.vems.co.uk/VEMSTrigger/24+4AfterSwapTrig.txt
Changing back to the correct trigger connections but removing the pull-down resistors.
http://vems.hu/www.vems.co.uk/VEMSTrigger/24+4FinalMiseryTrig.txt
A log from the bench test
http://vems.hu/www.vems.co.uk/VEMSTrigger/24+4BenchLog.txt
Toyota 24+4 Distributor:
#10 is the injector signal - indicating 1 injection event every two ignition events.
Will this work with a divider of 2 to ensure that we get a batch injection event every second ignition event?