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Home >> Lexus >> 2024 >> TX 350 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 51 (Rear Motor Generator Control System - Diagnostic Codes) >> REAR MOTOR GENERATOR CONTROL SYSTEM (for PHEV Model) >> DTC P26F4-31: Coolant Pump "C" Control Circuit No Signal [12/2023 - ] >> Confirmation Driving Pattern

Confirmation Driving Pattern

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.

HINT: 

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Refer to UTILITY [12/2023 - ]

  1. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  2. Turn the ignition switch off and wait for 2 minutes or more.
  3. Enter the following menus: Powertrain / Rear Motor Generator / Active Test / Control the Motor/Generator Cooling Oil Pump.
  4. According to the display on the GTS, perform the Active Test and set the duty to 85%.

    HINT: 

    The Active Test cannot be performed if the duty ratio is set to 30% or lower or 90% or higher, if the ambient temperature is -10°C (14°F) or lower, or transmission fluid temperature sensor value is below -1°C (30.2°F) or lower.

  5. According to the display on the GTS, read the Data List and check that the value of "Motor/Generator Cooling Oil Pump Motor Revolution" is between 600 rpm and 7000 rpm.
  6. Enter the following menus: Powertrain / Rear Motor Generator / Utility / All Readiness.
  7. Check the DTC judgment result.

    HINT: 

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system has a malfunction.
    • If the judgment result shows INCOMPLETE, perform driving pattern again.