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

Brakes and Traction Control: Service Precautions

Precaution before repairing
1. To prevent damage to the system, follow procedures below before repair or diagnosis.
- Disconnect or connect each component (ABS CU, HCU assembly, etc.) with ignition switch off.
- For failure of components that is not specified for repair, replace those as assembly.
- When using an electric arc welding machine, disconnect each component (ABS CU, HCU assembly).
2. Do not spill brake fluid on painted surfaces, wiring, cables or connectors. If fluids damage painted surfaces or connectors, remove using a mop and water.