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Home >> Toyota >> 2017 >> Prius Prime Advanced >> Repair and Diagnosis (Single Page) >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Control System - Diagnostic Codes (6 Of 6) & Circuit Tests >> Hybrid Control System >> DTC U0424-81: HVAC Control Module to Hybrid Powertrain Control Module Invalid Serial Data Received [09/2016 - ] >> Description
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DTC U0424-81: HVAC Control Module to Hybrid Powertrain Control Module Invalid Serial Data Received [09/2016 - ]: Description

If the hybrid vehicle control ECU receives an invalid compressor control request from the air conditioning amplifier assembly via CAN communication, it will store this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
U0424-81 HVAC Control Module to Hybrid Powertrain Control Module Invalid Serial Data Received Invalid control request received from the air conditioning amplifier assembly
(1 trip detection logic)
Air conditioning amplifier assembly Does not come on Master Warning Light:
Does not come on