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Toyota Corolla Repair Manual: Engine coolant temperature circuit

Toyota Corolla Repair Manual / Diagnostics / Sfi system / Engine coolant temperature circuit

Dtc p0115 engine coolant temperature circuit

Dtc p0117 engine coolant temperature circuit low input

Dtc p0118 engine coolant temperature circuit high input

Inspection procedure
Hint: if different dtcs related to different systems that have terminal e2 as the ground terminal are output simultaneously, terminal e2 may be open. Read freeze frame data using the hand-h ...

Circuit description
A thermistor is built in the engine coolant temperature sensor and changes the resistance value according to the engine coolant temperature. The structure of the sensor and connection to the ecm ...

Other materials:

Circuit description
Shifting from 1st to o/d is performed in combination with on and off of the shift solenoid valve s1 and s2 controlled by ecm. If an open or short circuit occurs in either of the solenoid valves, the ecm controls the remaining normal solenoid valve to allow the vehicle to be operated smoothly ...

Shift solenoid a performance (shift solenoid valve s1)
Dtc p0751 shift solenoid a performance (shift solenoid valve s1) System description The ecm uses signals from the vehicle speed sensor and crankshaft position sensor to detect the actual gear position (1st, 2nd, 3rd or o/d gear). Then the ecm compares the actual gear with the shift schedu ...

Inspection procedure
Hint: if dtcs besides misfire are memorized simultaneously, first perform the troubleshooting for them. Read freeze frame data using the hand-held tester or the obd ii scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it ...

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