MG
Moderator
Please see T-SB-0042-22
Introduction:
Some 2021 model year RAV4 Prime vehicles may exhibit a short humming/buzzing noise upon startup (Ready ON) with the compressor on. Follow the Repair Procedure in this bulletin to address this condition.
Warranty Information:
Reprogram Air Conditioning Amplifier
Parts Information:
Part Number 88650-42863
*Part calibration will be updated by reprogramming. Part replacement is NOT covered by this Service Bulletin.
Repair Procedure
1. Turn the vehicle ON (Ready ON) and ensure the compressor is on. Is the short humming/buzzing noise present?
YES — Continue to step 2.
NO — This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.
2. Use Techstream to confirm the calibration ID for the air conditioning amplifier assembly. Is the air conditioning amplifier assembly calibration ID 8865F4204003, 8865F4204004, 8865F4204005, or 8865F4204006?
YES — Continue to step 3.
NO — This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.
3. Reflash the air conditioning amplifier assembly to calibration ID 8865F4204008
4. Using Techstream, perform Health Check and clear ANY stored DTCs.
5. Confirm air conditioning compressor humming/buzzing noise is no longer present.
Introduction:
Some 2021 model year RAV4 Prime vehicles may exhibit a short humming/buzzing noise upon startup (Ready ON) with the compressor on. Follow the Repair Procedure in this bulletin to address this condition.
Warranty Information:
Reprogram Air Conditioning Amplifier
Parts Information:
Part Number 88650-42863
*Part calibration will be updated by reprogramming. Part replacement is NOT covered by this Service Bulletin.
Repair Procedure
1. Turn the vehicle ON (Ready ON) and ensure the compressor is on. Is the short humming/buzzing noise present?
YES — Continue to step 2.
NO — This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.
2. Use Techstream to confirm the calibration ID for the air conditioning amplifier assembly. Is the air conditioning amplifier assembly calibration ID 8865F4204003, 8865F4204004, 8865F4204005, or 8865F4204006?
YES — Continue to step 3.
NO — This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.
3. Reflash the air conditioning amplifier assembly to calibration ID 8865F4204008
4. Using Techstream, perform Health Check and clear ANY stored DTCs.
5. Confirm air conditioning compressor humming/buzzing noise is no longer present.