ELECTRICAL CONNECTIONS
Inspect wiring and electrical connections. Disassemble and clean all corroded connections. Replace damaged wiring, connectors, or terminals. Repair any shorted electrical circuits. Refer to wiring diagrams and reference charts to identify specific wiring details.
IMPORTANT: The key to effective troubleshooting is confirming the proper operation of each engine system. Causes of electrical failures may be difficult to isolate. Check the integrity of all connections, grounds, and wiring prior to replacing a suspect component.
Inspect the condition and positioning of the following components:
Engine Management Module (EMM): wiring to EMM connectors and pins
Stator: connections to EMM, wiring to connectors, and connector pins
Engine wiring harness and connectors
Stator to EMM Connectors
| Pin No. | Description of Circuit | Wire Color |
|---|---|---|
| 1. | Stator winding (yellow) | Yellow/White |
| 2. | Stator winding (yellow) | Yellow |
| 3. | Stator winding (orange) | Orange/White |
| 4. | Stator winding (orange) | Orange |
| 5. | Stator winding (brown) | Brown/White |
| 6. | Stator winding (brown) | Brown |
J1-A Connector
| Pin No. | Description of Circuit | Wire Color |
|---|---|---|
| 1. | Oil Pressure switch | Tan/White |
| 2. | Diagnostic connector | Red |
| 3. | Diagnostic connector | White |
| 4. | vacant | |
| 5. | vacant | |
| 6. | Crankshaft position sensor (CPS) | Yellow |
| 7. | CPS ground (digital) | White |
| 8. | Bootstrap connector (programming) | Blk/Orange |
| 9. | Stop circuit | Blk/Yellow |
| 10. | Throttle position sensor (TPS) 5 V | Red |
| 11. | vacant | |
| 12. | vacant | |
| 13. | vacant | |
| 14. | vacant | |
| 15. | 12 V to EMM (fused) | Red/Purple |
| 16. | Tachometer | Gray |
| 17. | SystemCheck, CHECK ENGINE light | Tan/Orange |
| 18. | TPS analog ground | Green |
| 19. | Engine temperature sensor (water) | Pink/Black |
| 20. | Air temperature sensor | Pink/Blue |
| 21. | vacant | |
| 22. | vacant | |
| 23. | vacant | |
| 24. | SystemCheck, NO OIL light | Tan/Yellow |
| 25. | SystemCheck WATER TEMP light | Tan |
| 26. | TPS ground (analog) | Black |
| 27. | Engine temp. sensor ground (analog) | Black |
| 28. | Air temperature sensor ground (analog) | Black |
| 29. | Neutral switch (shift linkage) | Yellow/Red |
| 30. | vacant | |
| 31. | vacant | |
| 32. | vacant | |
| 33. | vacant | |
| 34. | vacant |
J1-B Connector
| Pin No. | Description of Circuit | Wire Color |
|---|---|---|
| 1. | Injector, cylinder 2 | Purple |
| 2. | Injector, cylinder 3 | Green |
| 3. | +55 V, in (ignition) | White/Red |
| 4. | +55 V, in (ignition) | White/Red |
| 5. | vacant | |
| 6. | vacant | |
| 7. | Ignition, cylinder 3 | Orange/Green |
| 8. | Injector, cylinder 1 | Blue |
| 9. | vacant | |
| 10. | Switched B+ | Purple |
| 11. | Ignition ground | Black |
| 12. | vacant | |
| 13. | vacant | |
| 14. | Injector ground | Black |
| 15. | vacant | |
| 16. | Ignition ground | Black |
| 17. | Ignition ground | Black |
| 18. | vacant | |
| 19. | Ignition, cylinder 2 | Orange/Purple |
| 20. | Injector ground | Black |
| 21 | Injector ground | Black |
| 22. | vacant | |
| 23. | Oil solenoid | Blue |
| 24. | Ignition ground | Black |
| 25. | vacant | |
| 26. | Ignition, cylinder 1 | Orange/Blue |
J2 Connector
| Pin No. | Description of Circuit | Wire Color |
|---|---|---|
| 1. | Stator winding, 1S | Yellow |
| 2. | Stator winding, 2S | Brown |
| 3. | Stator winding, 3S | Orange |
| 4. | Fuel pump control | Brown |
| 5. | Ground (fuel pump) | Black |
| 6. | Ground (power module) | Black |
| 7. | Ground (power module) | Black |
| 8. | Ground (injector power supply) | Black |
| 9. | Stator winding, 1F | Yellow/White |
| 10. | Stator winding, 2F | Brown/White |
| 11. | Stator winding, 3F | Orange/White |
| 12. | Fuel pump (flyback) | White/Red |
| 13. | +55V, out | White/Red |
| 14. | +55V, out | White/Red |
| 15. | +12V out | Red |
| 16. | +12V out | Red |
Refer to CONNECTOR SERVICING on p. 149 for AMP connector servicing procedures.
