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Home >> Lexus >> 2007 >> LS 460L >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle >> Automatic Transmission System >> DTC P0748 Pressure Control Solenoid "A" Electrical (Shift Solenoid Valve SL1); DTC P0778 Pressure Control Solenoid "B" Electrical (Shift Solenoid Valve SL2); DTC P0798 Pressure Control Solenoid "C" Electrical (Shift Solenoid Valve SL3); DTC P2810 Pressure Control Solenoid "G" Electrical (Shift Solenoid Valve SL4); DTC P2819 Pressure Control Solenoid "H" Electrical (Shift Solenoid Valve SL5) >> Description

DTC P0748 Pressure Control Solenoid "A" Electrical (Shift Solenoid Valve SL1); DTC P0778 Pressure Control Solenoid "B" Electrical (Shift Solenoid Valve SL2); DTC P0798 Pressure Control Solenoid "C" Electrical (Shift Solenoid Valve SL3); DTC P2810 Pressure Control Solenoid "G" Electrical (Shift Solenoid Valve SL4); DTC P2819 Pressure Control Solenoid "H" Electrical (Shift Solenoid Valve SL5): Description

Based on the ON-OFF combinations of the shift solenoid valve SL1, 2, 3, 4 and 5, the TCM performs gear shifts from 1st gear to 8th gear.

If a line related to a solenoid valve is open or shorted, the TCM uses the fail-safe function to turn other solenoid valves ON or OFF. If all solenoid valves are malfunctioning, only the mechanical fluid pressure circuit will function and the system will change to manual transmission. If an open or short has occurred, the TCM cuts power to the malfunctioning solenoid valve.

DTC DETECTION CONDITION CHART

DTC No. DTC Detection Condition
  1. Diagnosis Condition
  2. Malfunction Status
  3. Malfunction Time
  4. Other
Trouble Area
P0748
  1. Driving so that gear changes occur
  2. Solenoid valve SL1 circuit is open or shorted
  3. 1 second
  4. 1 trip detection logic
  • Shift solenoid valve SL1
  • Transmission wire
  • Harness and connector
  • TCM
P0778
  1. Driving so that gear changes occur
  2. Solenoid valve SL2 circuit is open or shorted
  3. 1 second
  4. 1 trip detection logic
  • Shift solenoid valve SL2
  • Transmission wire
  • Harness and connector
  • TCM
P0798
  1. Driving so that gear changes occur
  2. Solenoid valve SL3 circuit is open or shorted
  3. 1 second
  4. 1 trip detection logic
  • Shift solenoid valve SL3
  • Transmission wire
  • Harness and connector
  • TCM
P2810
  1. Driving so that gear changes occur
  2. Solenoid valve SL4 circuit is open or shorted
  3. 1 second
  4. 1 trip detection logic
  • Shift solenoid valve SL4
  • Transmission wire
  • Harness and connector
  • TCM
P2819
  1. Driving so that gear changes occur
  2. Solenoid valve SL5 circuit is open or shorted
  3. 1 second
  4. 1 trip detection logic
  • Shift solenoid valve SL5 Transmission wire
  • Harness and connector
  • TCM