Operation CHARM: Car repair manuals for everyone.

Engine - Coolant Temperature Sensor/Switch


Air Fuel Mixture
CO content less than 5 % [2]

Air Temperature Sensor
Resistance value at specified temperature
2.1 - 2.9k ohms 20° C (68° F)
0.27 - 0.38k ohms 80° C (176° F)

Auxiliary Air Control Valve
Resistance value 10 ohms [1]

ECCS Relay
Resistance between terminals 1 and 2 continuity

Engine Temperature Sensor
Resistance value at specified temperature
2.1 - 2.9k ohms 20° C (68° F)
0.3 - 0.33k ohms 80° C (176° F)

Fuel Injector
Resistance value 10 - 15 ohms [1]

Fuel Pump
Resistance between terminals A and C continuity

Fuel Pump Relay
Resistance between terminals 1 and 2 continuity

Idle Switch
Closes 1000 ± 150 rpm in neutral

SCV Solenoid
Operating voltage 12 VDC
Resistance value continuity

Throttle Sensor
Voltage between terminals e and f at idle 0.5 VDC [1]



[1] Approximately
[2] With 2.5k ohm resistor in place of engine temperature