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LEMON is the spiritual successor to CHARM, I recommend you try it!
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58X Reference PCM Input
58X Reference PCM InputThe
powertrain control module (PCM) uses this signal from the crankshaft position
(CKP) sensor to calculate engine RPM and crankshaft position at all engine speeds.
The
PCM also uses the pulses on this circuit to initiate injector pulses. If the PCM receives no pulses on this circuit, a DTC will set. The engine will not start and run without using the 55X reference signal.