Generator Lamp/L-Terminal Circuit High
The L-terminal feedback from the alternator reads above the upper limit — short to supply or open ground side. Charging diagnostics cannot run cleanly.
Affected components
- Alternator
- Charging warning lamp wiring
Common causes
- High likelihood: L-terminal shorted to supply
- Medium likelihood: Alternator regulator failed
- Low likelihood: Connector pins corroded - high contact resistance
Diagnostic notes
- The malfunction indicator lamp may illuminate
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.