Ignition Circuit Faults
IGNITION CONTROL CIRCUIT FAULTSOpen Circuit
An open Ignition Control (IC) circuit will set a Diagnostic Trouble Code (DTC) 41. Powertrain Controls - ECM/PCM
Grounded Circuit
A grounded IC circuit will set a DTC 42. An open or grounded IC circuit will result in a engine cranks but will not run. Powertrain Controls - ECM/PCM
SIGNAL CIRCUIT FAULTS
Low Resolution Circuit
An open or ground in the low resolution signal circuit will set a DTC 16 and the engine will not start. Powertrain Controls - ECM/PCM
High Resolution Circuit
If the high resolution signal circuit becomes open or grounded a DTC 36 would set. This will cause reduced performance and poor fuel economy. Powertrain Controls - ECM/PCM
NOTE: An inoperative distributor vent system may cause premature distributor failure. Refer to Chart C-4C Distributor Vent System Check for distributor vent system diagnosis. Chart C-4C Distributor Vent System Check