875648 Volvo.Penta Water pump

Table 1
Diagnostic Codes Table
J1939 Code and Description Conditions which Generate this Code System Response
1656-2 Automatic Start Enable Switch : Erratic, Intermittent, or Incorrect The Electronic Control Module (ECM) detects a parity error in the circuit for the customer installed switch. The Engine State Control Input Configuration parameter must be set to "Hardwired Input" for this code to become active. The code is logged..
The red stop lamp is illuminated.
The engine is shut down.
The ECM is latched. For this application, the customer may install an engine control switch that can be used for automatic engine starting and stopping from a remote location. In order for the switch inputs to be read by the ECM, the Engine State Control Input Configuration parameter must be set to "Hardwired Input". Two switch inputs at the ECM are used to detect the following circuit signals:
Table 2
Customer Installed Automatic Start Switch States
ECM Function P1-40 P1-54
Engine Auto Start Grounded Grounded
1656-2 Active Open Grounded
1656-2 Active Grounded Open
Engine Auto Stop Open Open The most likely problem with the automatic start function is probably caused by a problem with the customer installed switch. The next likely cause is a problem