Engine Controls and Fuel - Marine
9-155
SPN 65701 or 65702 Diagnostic Instructions • Perform the Powertrain On Board Diagnostic (OBD) System Check on page 9-64 prior to using this diagnostic procedure. • Review Strategy Based Diagnosis on page 6-4 for an overview of the diagnostic approach. • Diagnostic Procedure Instructions on page 6-5 provides an overview of each diagnostic category.
SPN Descriptors SPN 65701 FMI 31:
General Warning Sensor 1 Not Available
SPN 65702 FMI 31:
General Warning Sensor 2 Not Available
Circuit/System Description
Diagnostic Aids
The general warning sensor changes resistance based on position. The engine control module (ECM) monitors the signal circuit from the general warning sensor. The ECM supplies 5-volts to the general warning sensor on the 5-volt reference circuit. The ECM also provides a ground on the low reference circuit. The general warning sensor provides a signal to the ECM on the signal circuit which is relative to changes in position. The component that the general warning sensor monitors may vary between manufacturers.
If a shared 5-volt reference circuit is shorted to ground or shorted to a voltage, other 5-volt reference circuits may be affected.
Conditions for Running the SPN • SPN 630, 65580, 65620, 65621, 65622, or 65623 is not set. • The ignition is ON, or the engine is operating. • The SPNs 65701 and 65702 run continuously when the above conditions are met for greater than 5 seconds.
Conditions for Setting the SPN
Reference Information Schematic Reference Engine Controls Schematics on page 9-6
Connector End View Reference • Engine Control Module Connector End Views on page 9-30 • Engine Controls Connector End Views on page 9-33
Electrical Information Reference • Circuit Testing on page 11-6 • Connector Repairs on page 11-22 • Testing for Intermittent Conditions and Poor Connections on page 11-13 • Wiring Repairs on page 11-16
The ECM detects the general warning sensor voltage is less than, or greater than, a calibrated value for greater than 5 seconds.
SPN Type Reference
Action Taken When the SPN Sets
Suspect Parameter Number (SPN) Type Definitions on page 6-9
SPN 65701 and 65702 are Type C SPNs.
Conditions for Clearing the SPN SPN 65701 and 65702 are Type C SPNs.
2011 - Marine Engines Manual
Scan Tool Reference Engine Control Module Scan Tool Information on page 9-54