CAUTION / NOTICE / HINT HINT: *: Use the Techstream. PROCEDURE
(a) Interview the customer and confirm the problem. Click here
(a) Check and record DTCs and Freeze Frame Data. for DTC Check / Clear: Click here for Freeze Frame Data: Click here
(b) Clear the DTCs and Freeze Frame Data. for DTC Check / Clear: Click here
for Freeze Frame Data: Click here
(c) Reconfirm the DTCs. (1) Reconfirm the DTCs based on the recorded DTCs and Freeze Frame Data. for DTC Check / Clear: Click here for Freeze Frame Data: Click here
HINT:
(a) Proceed to Diagnostic Trouble Code Chart. Click here
(a) Proceed to How to Proceed with Troubleshooting. Click here
(a) Proceed to Problem Symptoms Table. Click here
(a) Clear the DTCs. Click here (b) Check if the same DTCs are output. Click here
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Hybrid Control System: HVAC Control Module to Hybrid Powertrain Control Module Invalid Serial Data Received (U042481)
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 U042481 HVAC Control Module to Hyb ...