5
E
GENERAL SYSTEM DIAGNOSTICS
SERVICE MANUAL NUMBER 23
90-861326--1 MARCH 1999 Page 5E-1
FUEL SYSTEM
Section 5E - General System Diagnostics
Table of Contents
Diagnostic Circuit Check 5E-2. . . . . . . . . . . . .
Scan Tool Normal Specifications (Idle /
Warm Engine / Closed Throttle /
Neutral) 5E-2. . . . . . . . . . . . . . . . . . . . . . . .
MEFI 1 - ECM Connector Chart For
454/502 Mag MPI and 8.2L MPI 5E-3. . . . . .
Diagnostic Trouble Codes 5E-5. . . . . . . . . . . .
MEFI 1 - Codes for the 454 / 502 Mag
MPI and 8.2L MPI Engines 5E-5. . . . . . .
MEFI 2 - Codes for the 7.4L MPI
Engines 5E-5. . . . . . . . . . . . . . . . . . . . . . . .
Diagnostic Trouble Codes for the MEFI 3
454 cid (7.4L) / 502 cid (8.2L)
Engines 5E-6. . . . . . . . . . . . . . . . . . . . . . . .
Special Tools 5E-7. . . . . . . . . . . . . . . . . . . . . . .
MEFI 1 - 454/502 Mag MPI and 8.2L MPI
Symptom Chart (J-1 Circuits) 5E-10. . . . . . . .
MEFI 1 - 454/502 Mag MPI and 8.2L MPI
Symptom Chart (J-2 Circuits) 5E-12. . . . . . . .
MEFI 1 - 454/502 Mag MPI and 8.2L MPI
Wiring System Diagram (1 of 4) 5E-16. . . . . .
MEFI 2 - ECM Connector Chart For
7.4L MPI 5E-23. . . . . . . . . . . . . . . . . . . . . . . . . .
MEFI 2 - 7.4L MPI Symptom Chart
(J-1 Circuits) 5E-26. . . . . . . . . . . . . . . . . . . . . . .
MEFI 2 - 7.4L MPI Wiring System Diagram
(1 of 4) 5E-32. . . . . . . . . . . . . . . . . . . . . . . . . . . .
MEFI 3 - ECM Connector Chart 5E-40. . . . . . .
MEFI 3 - ECM J-1 and J-2 Circuit/
Symptom Chart 5E-41. . . . . . . . . . . . . . . . . . . .
MEFI 3 - ECM Wiring 1 of 4 5E-45. . . . . . . . . . .
Injector Balance Test 5E-49. . . . . . . . . . . . . . . .
Test Procedure 5E-49. . . . . . . . . . . . . . . . . . .
Test Example 5E-50. . . . . . . . . . . . . . . . . . . .
General Diagnostic Tests 5E-51. . . . . . . . . . . . .
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