LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2021 >> Mirai Limited >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Control System - Diagnostic Codes (18 Of 18) & Circuit Tests (1 Of 3) >> Hybrid Control System >> DTC U0424-81: HVAC Control Module to Hybrid Powertrain Control Module Invalid Serial Data Received [12/2023 - ] >> Caution / Notice / Hint

Caution / Notice / Hint

NOTE:
  • This vehicle performs FC system shutdown process after turning the ignition switch off from ON (READY). Therefore, after the ignition switch is turned off from ON (READY), do not perform any work on the electrical system for at least 10 minutes including removing connectors or disconnecting the negative (-) auxiliary battery terminal.
  • When the EV control ECU determines that the temperature of FC system components is below 0°C (32°F) when the vehicle is parked with the ignition switch off, it operates the FC air compressor, hydrogen pump and FC cooling water pump for a maximum of 180 seconds to drain the FC stack assembly. When performing inspection or repairs with the ignition switch off (not ON or ON (READY)), disconnect the cable from the negative (-) auxiliary battery terminal before performing work. (If the auxiliary battery voltage is needed to conduct inspection, perform the inspection in an environment with an ambient temperature of 10°C (50°F) or higher.)
scientia non olet · About LEMON Manuals