TROUBLE CODE DIAGNOSTICS - 454/502 MAG MPI & 8.2L MPI
SERVICE MANUAL NUMBER 23
Code 43 (3 of 3): Knock Sensor (KS) Circuit (Scan)
STEP
ACTION
VALUE
YES
NO
PROCEED TO
1.
2.
3.
Connect a test light to ground.
Disconnect KS module harness connector.
7
Touch the test light to KS module harness
connector terminal “B” (CKT439).
Is the test light on?
–
–
Step 11 Step 12
Inspect knock sensor terminal contacts. If OK,
replace knock sensor.
8
9
–
–
–
–
–
–
–
–
Check for open or short in CKT 496. If OK, re-
place knock sensor.
–
–
–
CKT 496 open, shorted to ground or faulty
knock sensor module.
10
11
CKT 485 open, shorted to ground or faulty
knock sensor module.
12
13
14
Repair open or grounded CKT 439.
Repair open ground CKT 486.
Faulty ECM.
–
–
–
–
–
–
–
–
–
Index
Page 5F-36
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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