| 1. | Start the engine, and let it idle. |
| 2. | Monitor the ALTERNATOR in the DATA LIST with the HDS. |
| 3. | Check if the indicated percentage varies when the headlight switch is turned on. Does the percentage vary? YES - The alternator signal circuit is OK.n NO - Go to 4. |
| 4. | Turn the headlight switch and ignition switch OFF. |
| 5. | Jump the SCS line with the HDS. |
| 6. | Disconnect the alternator 4P connector. |
| 7. | Disconnect ECM/PCM connector B (44P). |
| 8. | Check for continuity between body ground and ECM/PCM connector terminal B43.
Is there continuity? YES - Repair short in the wire between the ECM/PCM (B43) and the alternator.n NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.n |