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

Coolant Temperature Sensor/Switch (For Computer): Service and Repair


The coolant temperature sensor is located at the top of the cylinder head above the flywheel.

1. Disconnect electrical connector from CTS.

Caution: Do not remove sensor with cooling system hot and under pressure.

2. Remove CTS from cylinder head and rapidly plug hole.
3. Reverse procedure to install.