Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Charging System Diagnostics

Tests 1 - 4:




Tests 5 - 9:





SYMPTOM
CHARGING SYSTEM NO CODE

POSSIBLE CAUSES
- Trouble codes present
- Generator field terminals intermittent defect
- Generator ground circuit high resistance
- B+ circuit high resistance (0.4 Volt)
- B+ circuit high resistance (1 Volt)
- PCM defective (charging system)
- Generator belt visibly defective
- Trouble codes present 1600 RPM