Mercury MerCruiser MIE 7.4L MPI - Page 698

5
F
SERVICE MANUAL NUMBER 23
TROUBLE CODE DIAGNOSTICS - 454/502 MAG MPI & 8.2L MPI
90-861326--1 MARCH 1999 Page 5F-1
FUEL SYSTEM
Section 5F - Trouble Code Diagnostics-
454 / 502 MAG MPI & 8.2L MPI
Table Of Contents
Clearing Trouble Codes 5F-3. . . . . . . . . . . . . .
Clearing Codes Using Diagnostic Code
Tool 5F-3. . . . . . . . . . . . . . . . . . . . . . . . . . .
Clearing Codes Using Scan Tool 5F-3. . .
Diagnostic Testing Without A Scan Tool 5F-4
Code 14 (1 of 3): Engine Coolant
Temperature (ECT) Sensor Circuit 5F-4.
Code 14 (2 of 3): Engine Coolant
Temperature (ECT) Sensor Circuit 5F-5.
Code 14 (3 of 3): Engine Coolant
Temperature (ECT) Sensor Circuit 5F-6.
Code 21 (1 of 2): Throttle Position (TP)
Sensor Circuit 5F-7. . . . . . . . . . . . . . . . . .
Code 23 (1 of 2): Intake Air Temperature
(IAT) Sensor Circuit 5F-9. . . . . . . . . . . . .
Code 33 (1 of 3): Manifold Absolute
Pressure (MAP) Sensor Circuit 5F-11. . . .
Code 42 (1 of 3): Ignition Control (IC)
Circuit 5F-14. . . . . . . . . . . . . . . . . . . . . . . . . .
Code 43 (1 of 3): Knock Sensor (Ks)
Circuit 5F-17. . . . . . . . . . . . . . . . . . . . . . . . .
Code 51 (1 of 1): Calibration Memory
Failure 5F-20. . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostic Testing Using A Scan Tool 5F-21. .
Code 14 (1 of 2): Engine Coolant
Temperature (ECT) Sensor Circuit
(Scan) 5F-21. . . . . . . . . . . . . . . . . . . . . . . . .
Code 21 (1 of 3): Throttle Position
(TP) Sensor Circuit 5F-23. . . . . . . . . . . . . .
Code 21 (3 of 3): Throttle Position
(TP) Sensor Circuit 5F-25. . . . . . . . . . . . . .
Code 23 (1 of 2): Intake Air Temperature
(IAT) Sensor Circuit 5F-26. . . . . . . . . . . . . .
Code 33 (1 of 3): Manifold Absolute
Pressure (MAP) Sensor Circuit 5F-28. . . .
Code 42 (1 of 3): Ignition Control (IC)
Circuit 5F-31. . . . . . . . . . . . . . . . . . . . . . . .
Code 43 (1 of 3): Knock Sensor (KS)
Circuit 5F-34. . . . . . . . . . . . . . . . . . . . . . . . .
Code 51 (1 of 2): Calibration Memory
Failure 5F-37. . . . . . . . . . . . . . . . . . . . . . . . .
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