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Home >> Lexus >> 2019 >> LS 500 Base, RWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System - Diagnostic Codes (11 Of 14) >> SFI System >> DTC P16B3-18: Multi Flow Control Valve Motor Circuit Current Below Threshold; DTC P16B3-19: Multi Flow Control Valve Motor Circuit Current Above Threshold [12/2017 - ] >> Description
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DTC P16B3-18: Multi Flow Control Valve Motor Circuit Current Below Threshold; DTC P16B3-19: Multi Flow Control Valve Motor Circuit Current Above Threshold [12/2017 - ]: Description

Refer to DTC P16B8-71.

Refer to DTC P16B8-71: Multi Flow Control Valve Actuator Stuck [12/2017 - ] 

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P16B3-18 Multi Flow Control Valve Motor Circuit Current Below Threshold Both of the following conditions are met for 2 seconds or more (1 trip detection logic):
  • The DC motor drive duty cycle is 45% or higher.
  • The ball valve actuator current is less than 0.5 A.
  • Open in water control valve circuit
  • Water control valve
  • ECM
Comes on DTC stored SAE: P16B1
P16B3-19 Multi Flow Control Valve Motor Circuit Current Above Threshold A motor driver IC high current limiter monitor input malfunction is detected for 2 seconds or more (1 trip detection logic).
  • Short in water control valve circuit
  • Water control valve
  • ECM
Comes on DTC stored SAE: P16B2