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

Temperature Sensor Check


There are two temperature sensors which work independently of one another in the temperature sensor housing.
1. With ignition Off, disconnect multiple pin plug from ECU.
2. With temperature sensor wire connector attached, connect suitable ohmmeter test leads across ECU connector terminals 2 and 5. Resistance should be as follows:
a. With engine temperature at 32° F, resistance should be 4400 - 6800 ohms.
b. With engine temperature at 75° F, resistance should be 1400 - 3600 ohms.
c. With engine temperature at 104° F, resistance should be 900 - 1300 ohms.
d. With engine temperature at 140° F, resistance should be 480 - 720 ohms.
e. With engine temperature at 176° F, resistance should be 250 - 390 ohms.