Please see T-SB-0004-22
Applicability:
2016 - 2022 Toyota Tacoma
Introduction:
Some 2016 – 2022 model year Tacoma vehicles may exhibit what customers describe as a 1 – 3-second whistle noise from the HVAC system when the air conditioning system is ON. The whistle noise may occur as the compressor cycles ON/OFF and is more prevalent with increased engine RPM during hot ambient temperatures. Follow the Repair Procedure in this bulletin to address this condition.
APPLICABLE WARRANTY:
This repair is covered under the Toyota Basic Warranty. This warranty is in effect for 36 months or 36,000 miles, whichever occurs first, from the vehicle’s in-service dat
Warranty application is limited to occurrence of the specified condition described in this bulletin.
Repair Procedure:
1. With the vehicle engine running in Park and the parking brake firmly applied, turn ON the air conditioning and set the temperature to low. Slowly bring the engine speed to 3,000 RPM and hold this RPM until the compressor begins to cycle ON and OFF. Is there a 1 – 3-second whistle noise heard from the air conditioning system each time the compressor cycles ON/OFF during hot ambient temperatures?
YES — Continue to step 2.
NO — This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.
2. Remove the air conditioning unit
3. Remove the evaporator core
4. Install the NEW evaporator core.
5. Install the air conditioning unit
6. Confirm the whistle noise is no longer present by repeating step 1.
Applicability:
2016 - 2022 Toyota Tacoma
Introduction:
Some 2016 – 2022 model year Tacoma vehicles may exhibit what customers describe as a 1 – 3-second whistle noise from the HVAC system when the air conditioning system is ON. The whistle noise may occur as the compressor cycles ON/OFF and is more prevalent with increased engine RPM during hot ambient temperatures. Follow the Repair Procedure in this bulletin to address this condition.
APPLICABLE WARRANTY:
This repair is covered under the Toyota Basic Warranty. This warranty is in effect for 36 months or 36,000 miles, whichever occurs first, from the vehicle’s in-service dat
Warranty application is limited to occurrence of the specified condition described in this bulletin.
Repair Procedure:
1. With the vehicle engine running in Park and the parking brake firmly applied, turn ON the air conditioning and set the temperature to low. Slowly bring the engine speed to 3,000 RPM and hold this RPM until the compressor begins to cycle ON and OFF. Is there a 1 – 3-second whistle noise heard from the air conditioning system each time the compressor cycles ON/OFF during hot ambient temperatures?
YES — Continue to step 2.
NO — This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.
2. Remove the air conditioning unit
3. Remove the evaporator core
4. Install the NEW evaporator core.
5. Install the air conditioning unit
6. Confirm the whistle noise is no longer present by repeating step 1.