Cummins ISB CM550 (1990-94) Fault Code: 352 PID: SID 232 SPN: 620 FMI: 3 Sensor Supply Circuit

Circuit Description
The engine position sensor (EPS), the intake manifold pressure sensor, and the oil pressure sensor are powered by the same +5-VDC source and the same return in the electronic control module (ECM). This supply is also used to operate the intake manifold temperature and coolant temperature
sensors.

Component Location
The +5-VDC sensor supply circuit is located in the sensor harness. Refer to Procedure 100-002 (Engine Diagrams) in Section E for the sensor locations.

Shop Talk
These faults could also cause high-voltage or low-voltage faults on the coolant temperature and intake manifold temperature sensors.