DIAGNOSTICS
SERVICE MANUAL NUMBER 24
Code 33 (3 of 3): Manifold Absolute Pressure (MAP) Sensor Circuit
Step
Action
Yes
No
PROCEED TO
a. Switch CodeMate Tester to the “Normal Mode.”
b. Ignition OFF.
c. Disconnect MAP sensor harness connector.
d. Start engine and idle for 2 minutes or until CodeMate
Tester indicates a stored trouble code, whichever oc-
curs first.
8.
e. Ignition ON, engine OFF.
f.
Switch CodeMate Tester to the “Service Mode and note
trouble code.
Is trouble code 34 present?
Step 12. Step 9.
a. MAP sensor harness connector disconnected.
b. Ignition ON engine OFF.
9.
c. Connect DVOM from harness terminal “A” CKT 814 to
harness terminal “C” CKT 416.
Is voltage reading above 4 volts?
Step 13. Step 14.
–
10.
11.
Repair low or unsteady vacuum problem.
Trouble code is intermittent. Locate and repair intermit-
tent faulty connections. Refer to “Diagnostic Aids.”
–
Check for plugged or leaking sensor vacuum fitting. If
OK, replace faulty MAP sensor.
12.
13.
14.
Verify
Repair
–
–
–
Locate and repair short to voltage in CKT 432 or faulty
ECM connections.
Locate and repair open in CKT 814 or repair faulty ECM
connections.
Index
Page 5G-70
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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