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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 97 (Engine Control System (A25A-FXS) - Diagnostic Codes (P2610-P2A00)) >> SFI System >> DTC P26CA-12: Engine Coolant Pump Circuit Short to Battery [11/2023 - ] >> Description

DTC P26CA-12: Engine Coolant Pump Circuit Short to Battery [11/2023 - ]: Description

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The ECM calculates the necessary cooling amount based on the engine coolant temperature, engine speed and vehicle speed, and controls the water inlet housing with water pump sub-assembly accordingly. The water inlet housing with water pump sub-assembly controls the speed of the water inlet housing with water pump sub-assembly steplessly and optimally based on a duty cycle signal sent by the ECM, which reduces engine warm-up time, improves fuel efficiency and reduces cooling loss.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P26CA-12 Engine Coolant Pump Circuit Short to Battery The operation duty ratio signal (WPO) of the water inlet housing with water pump sub-assembly is a certain value or more when the water inlet housing with water pump sub-assembly operation signal is being output (1 trip detection logic).
  • Short in water inlet housing with water pump sub-assembly circuit
  • Water inlet housing with water pump sub-assembly
  • ECM
Comes on DTC stored
  • SAE Code: P26CD
  • DTC for Mexico Models: Applies
RELATED DATA LIST

DTC No. Data List
P26CA-12
  • Coolant Temperature
  • Electric Water Pump Target Speed
  • Electric Water Pump Speed