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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 65 (Hybrid Control System - Diagnostic Codes (5 Of 7)) >> HYBRID CONTROL SYSTEM (for PHEV Model) >> DTC P1AC4-13: Hybrid/EV Battery Stack 1 Current Interrupt Device Circuit Open [08/2023 - ] >> Monitor Description

Monitor Description

WARNING: This page is about a different car, the 2025 Lexus RX 450h+ and 2024 Lexus RX 450h+. However, it is still accessible from the selected car via links, so may be relevant.

A malfunction is detected and the MIL is illuminated when following condition is met:

  1. A large fluctuation in the DC/DC converter voltage occurs due to operation of the battery current interrupt device.
  2. A large fluctuation in the battery charger output voltage occurs due to operation of the battery current interrupt device.
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