SERVICE MANUAL NUMBER 23
TROUBLE CODE DIAGNOSTICS - 454/502 MAG MPI & 8.2L MPI
Code 21 (3 of 3): Throttle Position (TP) Sensor Circuit (Scan)
Connect DVOM between throttle position sen-
sor terminals “B” and “A.”
7
Voltage should be greater than 4 volts, is
–
Step 11 Step 12
it?
Check CKT 417 shorted to voltage, faulty ECM
connection, or faulty ECM.
8
9
–
–
–
–
–
–
Throttle position sensor signal (CKT 417)
open, shorted to ground, faulty connection at
ECM, or faulty ECM.
Check for open in CKT 416, faulty ECM con-
nection, or faulty ECM.
10
11
12
–
–
–
–
–
–
–
–
–
Replace throttle position sensor.
Open sensor ground CKT 813, faulty ECM
connection, or faulty ECM.
Index
90-861326--1
MARCH 1999
Page 5F-25
| 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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