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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Electrical >> Starter >> Stop And Start System - Diagnostic Codes (1 Of 3) >> Stop And Start System >> DTC P0606-29: Backup Boost Converter "A" Control CPU Signal Invalid [10/2022 - 11/2023] >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

CASE 1

Back up boost converter command frequency Less than 92.59 Hz
CASE 2

The following condition is met 5 times or more
Back up boost converter command frequency Higher than 108.7 Hz
CASE 3

Either of the following conditions (a) or (b) is met -
(a) Back up boost converter command duty cycle 24% or less
(b) Back up boost converter command duty cycle 85% or more