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Home >> Toyota >> 2016 >> 4Runner Limited, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Automatic Transmission System (A750E) - Diagnostic Codes & Circuit Tests) >> Automatic Transmission System >> DTC P0778: Pressure Control Solenoid "B" Electrical (Shift Solenoid Valve SL2) [08/2019 - ] >> Description

DTC P0778: Pressure Control Solenoid "B" Electrical (Shift Solenoid Valve SL2) [08/2019 - ]: Description

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Shifting from 1st to 5th is performed in combination with the ON and OFF operation of the shift solenoid valves SL1, SL2, S1, S2 and SR, which are controlled by the ECM. If an open or short circuit occurs in one of the shift solenoid valves, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be operated smoothly.

Refer to FAIL-SAFE CHART [08/2015 - ]

DTC Code DTC Detection Condition Trouble Area
P0778 While the vehicle is being driven so that gear changes occur, a short or open is detected in the shift solenoid valve SL2 circuit for 1 second (1-trip detection logic).
  • Open or short in shift solenoid valve SL2 circuit
  • Shift solenoid valve SL2
  • ECM