Mercury MerCruiser D2.8L D-Tronic Service Manual page 595

SERVICE MANUAL NUMBER 22
TEST DESCRIPTION
Verify continuity between the following:
Verify the resistance between terminals 1 and 2 of the sensor:
DIAGNOSTIC HELP:
Verify the following:
•
Open or short in the CKT Pin 8 or CKT Pin 21.
•
Bent pin at the 3 terminal connector or ECM.
•
Sensor mounting is improper.
•
Defective rpm sensor or ECM.
RPM Sensor failure influences engine performance as follows:
•
The engine will not start If the engine speed sensor fails during starting procedures.
The MIL (Malfunction Indicator Lamp) IS NOT illuminated.
•
The engine immediately shuts OFF if the engine speed sensor fails with the engine
operating. The MIL IS illuminated.
90-860074--1 FEBRUARY 2002
ECM 68 PIN CONNECTOR
8
21
21
RESISTANCE (Ohm)
1000
3 TERMINAL CONNECTOR
2
1 and 3 (3 is shield wire)
3 (shield wire)
MAXIMUM MEASUREMENT
1000 ohm
EDI DIAGNOSIS
Page 5E-27