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

Engine Temperature Sensor: Testing and Inspection

1. Disconnect coolant sensor connector and measure resistance across sensor terminals.

2. Resistance should be within the ranges on the table. Replace a sensor that deviates from these readings:

Temperature °C (°F) Resistance (K ohms)

-10 (14) 7 - 12
10 (50) 3 - 5
20 (68) 2 - 3
50 (122) 0.7 - 1
80 (176) 0.2 - 0.4