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)

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Coolant Temperature Sensor/Switch (For Computer)


Cold Advance Solenoid Valve
Resistance @ 68°F 38-44 ohm

Distributor Advance Solenoid Valve
Resistance @ 68°F 38-44 ohm

Coolant Temperature Sensor
Sensor Resistance At Water Temperature
5.9 Kohm 32°F
2.5 Kohm 68°F
1.1 Kohm 104°F
0.3 Kohm 176°F

Feedback Solenoid Valve
Resistance @ 68°F 38-44 ohm

Idle Up Solenoid Valve
Resistance @ 68°F 38-44 ohm

Secondary Air Control Solenoid Valve
Resistance @ 68°F 38-44 ohm

Slow Cut Solenoid Valve
Resistance @ 68°F 38-44 ohm

Throttle Opening Solenoid Valve
Resistance @ 68°F 38-44 ohm

TPS Output
Standard value 250 mV