Trooper LS V6-3.5L (1998)
Engine Control Module: Description and Operation
58X Reference PCM Input
General Description
The 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, DTC P0337
will set. The engine will not start and run without using the 58X reference signal.
