Overdrive Solenoid: Testing and Inspection

CIRCUIT

INSPECTION OF ELECTRIC CONTROL COMPONENTS
1. INSPECT OVERDRIVE SOLENOID AND RELAY





a. Turn on the ignition switch and the main switch.
b. Disconnect the connector from the thermo switch.
c. Repeatedly ground the relay side of connector with a sub-wire.





d. At this time, confirm that an operation sound from the solenoid and overdrive relay can be heard.
If there is no sound from either the solenoid or relay, check them.

3. INSPECT OVERDRIVE SOLENOID





a. Disconnect the solenoid wire and apply a 12 V battery voltage to the solenoid.
Confirm that the solenoid operation sound is heard.





b. Using an ohmmeter, measure the solenoid coil resistance.

Resistance: 13 Ohms

c. Connect the solenoid wire.