Spitronics TITAN Standard - 4.12.3 Setting Toyota 24 Pulse + TDC Timing

4.12.3 Setting Toyota 24Pulse + TDC Timing
This is a standard setup for most Toyota engines. There is a 24 teeth gear and a TDC reference
signal. If it has a Rotor and single coil, first do rotor fazing as described above under Rotor Fazing.
Then put the engine on the TDC mark. Now count the number of teeth that passed the 24 Pulse-
sensor since the TDC teeth past the TDC Pulse-sensor. If it is difficult to understand rotate the
engine anti clockwise until the TDC tooth is across the sensor. Now turn the engine clockwise and
count the number of teeth that passes the 24 Pulse-sensor, till you reach TDC mark. Enter this
value in Gear Teeth. To check if this setting is correct disconnect the injector fuses and crank the
engine with a timing light. See if the light flashes between 5 and 10°. If not adjust the value till it
does.
The car should start. Check with the timing light to see if the software timing correlates with the
engine timing. If the difference is less than 30°, adjustments can be made on the Timing Sensor
°BTDC field. Otherwise add or subtract one tooth and try again. If you can’t see the gear you can
enter speculative values in Gear Teeth. If the engine stops suddenly when cranking, it means that
timing is too fast. Increase the number of teeth and try again.
If the engine has coil packs then rotor fazing is no problem. If the trigger system can be adjusted,
put the engine on TDC and align the TDC mark on the dizzy, up with the TDC sensor. Enter 1 in
Gear Teeth and 0 in Timing Sensor °BTDC field. Start the engine and adjust the dizzy for timing
alignment of the software and engine. If the trigger system cannot be adjusted, put the TDC trigger
in line with the sensor and turn the engine clockwise to TDC marks as the above setup procedure
of counting the teeth and fine adjustment.
Ensure that the positives and negatives of the magnetic sensors are correct. If they are connected
wrong way round, the timing will retard instead of advance and the fazing will be wrong.
Sometimes the engine will start but it may not rev up. In some cases the teeth count may be larger
than crank fire pitch. Then you may have to change the coil pack wiring sequence to remedy the
problem.
Sometimes the gap in the pickup and rotor needs to be smaller. Adjust it so that it just clears the
rotor without touching. In case of 2 TDC pickups, they can be put in parallel as on the drawing. In
some cases the signal may be week and requires you to disconnect 1 of the pickups.