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Home >> Lexus >> 2019 >> ES 350 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 217 (Hybrid Battery System (For Lithium-Ion Battery) - Diagnostic Codes (3 Of 3) & Circuit Tests) >> HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY) >> DTC P1AC4-9E: Hybrid/EV Battery Stack 1 Current Interrupt Device Stuck On; DTC P1AC5-9E: Hybrid/EV Battery Stack 2 Current Interrupt Device Stuck On [08/2020 - ] >> Description

DTC P1AC4-9E: Hybrid/EV Battery Stack 1 Current Interrupt Device Stuck On; DTC P1AC5-9E: Hybrid/EV Battery Stack 2 Current Interrupt Device Stuck On [08/2020 - ]: Description

WARNING: This page is about a different car, the 2024 Lexus ES 300h, 2023 Lexus ES 300h, 2022 Lexus ES 300h, and 2021 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

Refer to the description for DTC P1AC4-13.

Refer to DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P1AC4-9E Hybrid/EV Battery Stack 1 Current Interrupt Device Stuck On Conductivity returns after high voltage circuit disconnected by CID operation.
(1 trip detection logic)
  • No. 1 HV supply stack sub-assembly
  • Battery ECU assembly
 Comes on Master Warning Light:
Comes on
P1AC5-9E Hybrid/EV Battery Stack 2 Current Interrupt Device Stuck On Conductivity returns after high voltage circuit disconnected by CID operation.
(1 trip detection logic)
  • No. 2 HV supply stack sub-assembly
  • Battery ECU assembly
 Comes on Master Warning Light:
Comes on
RELATED DATA LIST

DTC No. Data List
P1AC4-9E
  • Hybrid/EV Battery Cell 1 to 70 Voltage
  • Hybrid/EV Battery Cell 1 to 70 Internal Resistance
P1AC5-9E
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