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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 86 (Engine Control System (A25A-FXS) - Diagnostic Codes (P05B1-06DA)) >> SFI System >> DTC P0657-14: Actuator Supply Voltage "A" Circuit Short to Ground or Open [10/2022 - 11/2023] >> Monitor Description

Monitor Description

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The ECM monitors the auxiliary battery supply voltage applied to the throttle actuator.

When the power supply voltage (+BM) is less than 4 V for 0.8 seconds or more, the ECM interprets this as an open or short to ground in the power supply circuit, then illuminates the MIL and stores this DTC.

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