1. | Turn the ignition switch OFF. |
2. | Jump the SCS line with the HDS. |
3. | Disconnect ECM connector A (44P), then disconnect the HDS. |
4. | Measure resistance between ECM connector terminals A36 and A37.
Is there about 108-132 W? YES - Go to 35. NO - Go to 5. |
5. | Disconnect the gauge control module (tach) 36P connector. |
6. | Disconnect the VSA modulator-control unit 37P connector and the yaw rate/lateral acceleration sensor 4P connector. |
7. | Disconnect SRS unit connector A (28P). |
8. | If equipped EPS system, disconnect EPS control unit connector D (28P). |
9. | Check for continuity between ECM connector terminals A36 and A37.
Is there continuity? YES - Repair short in the wires between ECM connector terminals A36 and A37*.n NO - Go to 10. |
10. | Connect ECM connector terminal A36 to body ground with a jumper wire.
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11. | Check for continuity between gauge control module (tach) 36P connector terminal No. 1 and body ground.
Is there continuity? YES - Go to 12. NO - Repair open in the wire between the ECM (A36) and the gauge control module (tach).n |
12. | Check for continuity between VSA modulator-control unit 46P connector terminal No. 39 and body ground.
Is there continuity? YES - Go to 13. NO - Repair open in the wire between the ECM (A36) and the VSA modulator-control unit.n |
13. | Check for continuity between SRS unit connector A (28P) terminal No. 11 and body ground.
Is there continuity? YES - Go to 14. NO - Repair open in the wire between the ECM (A36) and the SRS unit.n |
14. | Check for continuity between EPS control unit connector D (28P) terminal No. 1 and body ground.
Is there continuity? YES - Go to 15. NO - Repair open in the wire between the ECM (A36) and the EPS control unit.n |
15. | Remove the jumper wire from ECM connector A (44P). |
16. | Connect ECM connector terminal A37 to body ground with a jumper wire.
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17. | Check for continuity between gauge control module (tach) 36P connector terminal No. 19 and body ground.
Is there continuity? YES - Go to 18. NO - Repair open in the wire between the ECM (A37) and the gauge control module (tach).n |
18. | Check for continuity between VSA modulator-control unit 46P connector terminal No. 38 and body ground.
Is there continuity? YES - Go to 19. NO - Repair open in the wire between the ECM (A37) and the VSA modulator-control unit.n |
19. | Check for continuity between SRS unit connector A (28P) terminal No. 12 and body ground.
Is there continuity? YES - Go to 20. NO - Repair open in the wire between the ECM (A37) and the SRS unit.n |
20. | Check for continuity between EPS control unit connector D (28P) terminal No. 15 and body ground.
Is there continuity? YES - Go to 21. NO - Repair open in the wire between the ECM (A37) and the EPS control unit.n |
21. | Reconnect the gauge control module (tach) 36P connector. |
22. | Measure resistance between ECM connector terminals A36 and A37.
Is there about 108-132 W? YES - Go to 23. NO - Substitute a known-good gauge control module (tach). If the HDS identify the vehicle, replace the original gauge control module (tach).n |
23. | Disconnect the gauge control module (tach) 36P connector. |
24. | Reconnect the VSA modulator-control unit 46P connector. |
25. | Measure resistance between ECM connector terminals A36 and A37.
Is there about 2.34-2.86 kW? YES - Go to 26. NO - Substitute a known-good VSA modulator-control unit. If the HDS identify the vehicle, replace the original VSA modulator-control unit.n |
26. | Disconnect the VSA modulator-control unit 46P connector. |
27. | Reconnect the yaw rate/lateral acceleration sensor 4P connector. |
28. | Measure resistance between ECM connector terminals A36 and A37.
Is there about 2.34-2.86 kW? YES - Go to 29. NO - Substitute a known-good yaw rate/lateral acceleration sensor. If the HDS identify the vehicle, replace the original yaw rate/lateral acceleration sensor.n |
29. | Disconnect the VSA modulator-control unit 46P connector and the yaw rate/lateral acceleration sensor 4P connector. |
30. | Reconnect SRS unit connector A (28P). |
31. | Measure resistance between ECM connector terminals A36 and A37.
Is there about 2.34-2.86 kW? YES - Go to 32. NO - Substitute a known-good SRS unit. If the HDS identify the vehicle, replace the original SRS unit.n |
32. | Disconnect SRS unit connector A (28P). |
33. | Reconnect EPS control unit connector D (28P). |
34. | Measure resistance between ECM connector terminals A36 and A37.
Is there about 2.34-2.86 kW? YES - Update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM.n NO - Substitute a known-good EPS control unit. If the HDS identify the vehicle, replace the original EPS control unit.n |
35. | Disconnect the gauge control module (tach) 36P connector. |
36. | Disconnect the VSA modulator-control unit 46P connector and the yaw rate/lateral acceleration sensor 4P connector. |
37. | Disconnect SRS unit connector A (28P). |
38. | Disconnect EPS control unit connector D (28P). |
39. | Check for continuity between ECM connector terminal A36 and body ground.
Is there continuity? YES - Repair short in the wire between ECM connector terminal A36 and the gauge control module (tach), the VSA modulator-control unit, the yaw rate/lateral acceleration sensor, the SRS unit, the EPS control unit, or the DLC.n NO - Go to 40. |
40. | Check for continuity between ECM connector terminal A37 and body ground.
Is there continuity? YES - Repair short in the wire between ECM connector terminal A37 and the gauge control module (tach), the VSA modulator-control unit, the yaw rate/lateral acceleration sensor, the SRS unit, the EPS control unit, or the DLC.n NO - Go to 41. |
41. | Reconnect all connectors and the battery. |
42. | Connect the HDS to the DLC. |
43. | Disconnect the gauge control module (tach) 36P connector. |
44. | Turn the ignition switch ON (II), and turn on the HDS. Does the HDS identify the vehicle? YES - Replace the gauge control module (tach).n NO - Go to 45. |
45. | Turn the ignition switch OFF. |
46. | Reconnect the gauge control module (tach) 36P connector. |
47. | Disconnect the VSA modulator-control unit 46P connector. |
48. | Turn the ignition switch ON (II), and turn on the HDS. Does the HDS identify the vehicle? YES - Replace the VSA modulator-control unit.n NO - Go to 49. |
49. | Turn the ignition switch OFF. |
50. | Reconnect the VSA modulator-control unit 46P connector. |
51. | Disconnect the yaw rate/lateral acceleration sensor 4P connector. |
52. | Turn the ignition switch ON (II), and turn on the HDS. Does the HDS identify the vehicle? YES - Replace the yaw rate/lateral acceleration sensor.n NO - Go to 53. |
53. | Turn the ignition switch OFF. |
54. | Reconnect the VSA modulator-control unit 46P connector and the yaw rate/lateral acceleration sensor 4P connector. |
55. | Disconnect SRS unit connector A (28P). |
56. | Turn the ignition switch ON (II), and turn on the HDS. Does the HDS identify the vehicle? YES - Replace the SRS unit.n NO - Go to 57. |
57. | Turn the ignition switch OFF. |
58. | Reconnect SRS unit connector A (28P). |
59. | Disconnect EPS control unit connector D (28P). |
60. | Turn the ignition switch ON (II), and turn on the HDS. Does the HDS identify the vehicle? YES - Replace the EPS control unit.n NO - Update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM.n |