Component Testing: Solenoids
- Obtain access to TCM. See Figure. Ensure ignition is off. Disconnect TCM harness connector. Turn ignition on. Using a fused jumper wire, connect one end to TCM harness connector terminal +B. With other end, probe terminals S1, S2 and S3, one at a time. See Figure. Ensure a "clicking" sound can be heard when battery voltage is applied. Replace solenoid if no sound is heard.
- To check solenoid seals, apply battery voltage to solenoid. Apply ATF to solenoid with battery voltage connected. See Fig 1. ATF should pass through solenoid. Remove battery voltage. Ensure ATF does not pass through solenoid. Replace solenoid if defective.
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.