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Home >> Toyota >> 2009 >> Corolla S, 1.8 L, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Automatic Transmission - U341E) >> Automatic Transaxle System >> DTC P0787 Shift / Timing Solenoid Low (Shift Solenoid Valve ST); DTC P0788 Shift / Timing Solenoid High (Shift Solenoid Valve ST) >> Monitor Description

Monitor Description

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The ECM commands gearshift by turning the shift solenoid valves "ON/OFF". When there is an open or short circuit in any shift solenoid valve circuit, the ECM detects the problem and the MIL comes on. Illuminating the MIL, the ECM performs the fail-safe and turns the other shift solenoid valves in good condition "ON/OFF" (In case of an open or short circuit, the ECM stops sending current to the circuit.).

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