| DTC 21-01: | Vehicle Speed Signal (Regular diagnosis) |
| 1. | Turn the ignition switch OFF. |
| 2. | Raise the vehicle, and support it with safety stands in the proper locations, and allow all four wheels to rotate freely. |
| 3. | Connect the HDS to the data link connector (DLC). |
| 4. | Start the engine, run the vehicle in the 4th gear (M/T), or D position (A/T). |
| 5. | Check the VEL in the DATA LIST with the HDS. Is vehicle speed indicated? YES - The system is OK at this time.n NO - Go to 6. |
| 6. | Check for DTCs in the PGM-FI system (M/T) or A/T system (A/T) with the HDS. Is DTC P0720, P0721, P0722 or P0723 indicated? YES - Perform the appropriate troubleshooting for the code indicated.n NO - Go to 7. |
| 7. | Start the engine and check the tachometer. Is the tachometer working correctly? YES - Go to 8. NO - Perform the gauge control module (tach) troubleshooting.n |
| 8. | Turn the ignition switch OFF. |
| 9. | Disconnect the ECM/PCM connector A (44P) and EPS control unit connector D (28P). |
| 10. | Check for continuity between EPS control unit connector D (28P) terminals No. 1 and ECM/PCM connector A (44P) terminals No. 36.
Is there continuity? YES - Go to 11. NO - Repair open in the wire between the EPS control unit and ECM/PCM.n |
| 11. | Check for continuity between EPS control unit connector D (28P) terminals No. 15 and ECM/PCM connector A (44P) terminals No. 37.
Is there continuity? NO - Repair open in the wire between the EPS control unit and ECM/PCM.n |