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Home >> Toyota >> 2014 >> Highlander XLE, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 40 (Automatic Transmission (U760E) - Diagnostic Codes) >> Automatic Transaxle System >> DTC P0776: Pressure Control Solenoid "B" Performance (Shift Solenoid Valve SL2) [12/2013 - 11/2015] >> System Description

System Description

WARNING: This page is about a different variant/trim than selected.

The ECM uses the vehicle speed signal and signals from the transmission speed sensors (NC, NT) to detect the actual gear (1st, 2nd, 3rd, 4th, 5th or 6th gear).

The ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical problems of the shift solenoid valves and valve body.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0776 Pressure Control Solenoid "B" Performance (Shift Solenoid Valve SL2) The engine revs freely when 4th, 5th, or 6th gear is commanded (2-trip detection logic).
When any of the following is detected twice (2-trip detection logic):
  • When 1st gear is commanded, 4th gear is engaged.
  • When 2nd gear is commanded, 4th gear is engaged.
  • When 3rd gear is commanded, 4th gear is engaged.
  • Shift solenoid valve SL2 remains open or closed
  • Valve body is blocked
  • Automatic transaxle (clutch, brake or gear etc.)
Comes on DTC stored