DIAGNOSTICS
SERVICE MANUAL NUMBER 24
Code 61 (1 of 2) Fuel Pressure (FP) Circuit
ECM
MEFI 3
B
B
416
GRY
J2-3
J2-26
J2-4
C
C
475 GRN
813 BLK
A
A
CIRCUIT DESCRIPTION:
The fuel pressure (FP) Sensor provides a voltage signal that changes with measured fuel
pressure. Signal voltage should be between 2.5 and 3.5 volts.
The FP signal provides inputs to the Electronic Control Module (ECM) for fuel control.
DIAGNOSTIC AIDS:
Check for the following conditions:
•
Poor connection at ECM. Inspect harness connectors for backed out terminals,
improper mating, broken locks, improperly formed or damaged terminals, and poor
terminal to wire connection.
•
•
•
Damaged harness. Inspect the wiring harness for damage and test by moving the FP
connector and harness.
The scan tool reads fuel pressure in voltage relative to the pressure regulator setting.
With ignition ON, engine OFF, the voltage should be 2.5-3.5 volts.
If DTC 62 is also set, check for a short to ground in CKT 416.
After repairs, clear DTC following “Clearing Trouble Codes ” procedure at the front of this
section. Failure to do so may result in DTC not properly being cleared.
Index
Page 5G-88
90-861327--1 OCTOBER 1999
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 305 CID, Mercury MerCruiser 350 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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