Installation manual

90-898305
6-10
Electronic Control Module (ECM)
ECM/PCM IDENTIFICATION
ECM - “Electronic Control Module”
PCM - “Propulsion Control Module”. PCM has all functions of ECM, including
the ability to handle Digital Throttle and Shift Functions.
ECM/PCM DESIGNATIONS
Non-555 OptiMax - This is the original ECM used on Optimax engines 1998-
2000 MY. Cannot accept CAN for Smartcraft operation. Smartcraft gauges
utilitized on 2000 MY ran through the 5 pin tach harness.
555 or Triple Nickel ECM/PCM - Started with 2001MY Optimax engines and
later installed on V-6 EFI (2002MY). This ECM/PCM has CAN capability for
Smartcraft. PCM introduced in 2003 MY for introduction of DTS on 225
Optimax. This ECM/PCM has one 5 volt power source identified as PWR 1 on
scan tool.
PCM 03/038 - Introduced for 2004 MY. Includes all functionality of 555 style
PCM/ECM. Major change is the addition of 5 volt power circuit (as soon as
the engine changes to the 14-pin harness). Now the engine sensors have a
dedicated 5 volt reference circuit while DTS/Smartcraft has a dedicated 5 volt
reference circuit. PWR 1 and PWR 2 now displayed on scan tool.
Notes
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