TROUBLE CODE DIAGNOSTICS - 454/502 MAG MPI & 8.2L MPI
SERVICE MANUAL NUMBER 23
Code 33 (3 of 3): Manifold Absolute Pressure (MAP) Sensor Circuit (Scan)
STEP
ACTION
VALUE
YES
NO
PROCEED TO
7
1. Ignition OFF.
Connect DVOM between MAP sensor
harness terminal “A” and “C.”
Ignition ON.
2.
3.
Voltage should be greater than 4 volts. Is
it?
–
–
–
–
Step 12 Step 13
MAP sensor signal CKT 432 shorted to volt-
age, faulty ECM connections or faulty ECM.
8
9
–
–
–
–
–
–
Check for MAP sensor signal CKT 432 shorted
to ground. if OK, Replace MAP sensor.
CKT 416 open, faulty ECM connection, or
faulty ECM.
10
MAP sensor signal CKT 432 open or shorted
to ground, faulty connections at ECM, or faulty
ECM.
11
–
–
–
–
12
13
Faulty MAP sensor.
–
–
–
–
Open sensor ground circuit.
Index
Page 5F-30
90-861326--1 MARCH 1999
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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