MerCruiser 305 CID (5.0L) Service Manual page 719

DIAGNOSTICS
Code 62 (2 of 3) Fuel Pressure (FP) Sensor Circuit
Step
1.
2.
3.
4.
5.
6.
7.
8.
Index
Page 5G-92
Was the "On-Board Diagnostic" (OBD) System Check
Performed?
Are you using a Scan Tool?
a. Ignition OFF.
Does scan tool indicate fuel pressure sensor voltage
less than .30 volt?
a. Ignition OFF
b. Disconnect fuel pressure sensor harness connector.
c. Connect a jumper wire from harness terminal "B" CKT
416 to harness terminal "C" CKT 475.
d. Ignition ON, engine OFF.
Does scan tool indicate fuel pressure sensor voltage
greater than 4 volts?
a. Ignition OFF.
b. Connect DVOM from harness terminal "B" (CKT 416) to
a known good ground.
Does DVOM indicate a voltage greater than 4 volts?
Trouble code 62 is intermittent. Locate and repair inter-
mittent faulty connections. Refer to "Diagnostic Aids."
a. Switch CodeMate Tester to the normal mode.
b. Ignition OFF.
c. Disconnect fuel pressure sensor harness connector.
d. Connect a jumper wire form harness terminal "B" CKT
416 to harness terminal "C" CKT 475.
e. Start engine and idle for 2 minutes or until CodeMate
Tester indicates a stored trouble code, whichever oc-
curs first.
f. Ignition ON, engine OFF.
g. Switch CodeMate Tester to "Service Mode" and note
trouble code.
Is trouble code 61 present?
a. Remove jumper wire from CKT 416 and CKT 475.
b. Connect DVOM from harness terminal "B" CKT 416 to
harness terminal "A" CKT 813.
Is voltage reading above 4 volts?
Action
SERVICE MANUAL NUMBER 24
Yes No
PROCEED TO
Step 2. OBD
Step 3. Step 7.
Step 4. Step 6.
Step 9. Step 5.
Step 10. Step 11.
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Step 9. Step 10.
Step 10. Step 11.
90-861327--1 OCTOBER 1999