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

Shift Solenoid: Testing and Inspection

Pinpoint Tests - OSC Equipped Vehicle








Shift Solenoid Pre-Diagnosis
Any time an electrical connector or solenoid body is disconnected, inspect the connector for terminal condition, corrosion and contamination. Also inspect the connector seal for damage. Clean, repair or install new as necessary.

Use the following shift solenoid operation information when carrying out Pinpoint Test A.

Solenoid Operation Chart (Part 1):




Solenoid Operation Chart (Part 2):





Shift Solenoid Failure Mode Chart
Failed ON or OFF due to PCM and/or vehicle wiring concerns, solenoid electrically, mechanically or hydraulically stuck ON or OFF.

SSA, SSB:




SSC, SSD:




PC A, PC B, PC C (Part 1):




PC A, PC B, PC C (Part 2):




PC A, PC B, PC C (Part 3):