Self-Diagnostic Code “1 — 1” Rectifier / Regulator (Over Charging)
• This self-diagnostic code indication may be canceled when turning the main switch “ON” (engine not running), because ECM detects battery voltage.
• It is difficult to thoroughly check the rectifier/regulator. Before replacing it with new one, check that the ground point has good electrical contact.
Troubleshooting
Step 1
- Check the rectifier/regulator.
Refer to “Rectifier/ Regulator Inspection” in Section 1K (Page 1K—9).
Is the result OK?
Yes Go to step 2.
No Faulty rectifier/regulator.
Step 2
- With the engine running, check charging voltage at idle speed.
Is the result 16 V or higher?
Yes Faulty rectifier/regulator.
No Faulty ECM or wire continuity/connection failure.
