TROUBLE CODE DIAGNOSTICS - 7.4L MPI
SERVICE MANUAL NUMBER 23
90-861326--1 MARCH 1999 Page 5G-21
Code 33 (2 of 3): Manifold Absolute Pressure (MAP) Sensor Circuit (Non-Scan)
High Signal Voltage (Continued)
5
Repair low or unsteady vacuum problem.
Is
action complete?
–
Verify
Repair
–
6
Check for plugged or leaking sensor vacuum
fitting. If OK replace faulty MAP sensor.
Is
action complete?
–
Verify
Repair
–
7
Locate and repair short to voltage in CKT 432.
If a problem is found, repair as necessary.
Was
a problem found?
– Step 9
8
Locate and repair open in CKT 814. If a prob-
lem is found, repair as necessary.
Was a prob-
lem found?
–
Verify
Repair
Step 9
9
Repair faulty ECM connectors or replace faulty
ECM.
Is action complete?
– –
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