MG
Moderator
Please see T-SB-0127-20
Applicability:
2020 Highlander, Highlander Hybrid
Introduction:
Some 2020 model year Highlander and Highlander Hybrid vehicles may experience a sudden loss of air conditioning cooling with Diagnostic Trouble Code (DTC) B1423 (Open in Pressure Sensor Circuit/Abnormal Refrigerant Pressure) present. Follow the Repair Procedure in this bulletin to address these conditions.
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 date.
Warranty application is limited to occurrence of the specified condition described in this bulletin.
Repair Procedure:
1. Does the vehicle exhibit a sudden loss of air conditioning cooling?
YES – Continue to step 2.
NO – This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual
2. Using Techstream, check for DTC B1423 (Open in Pressure Sensor Circuit/Abnormal Refrigerant Pressure). Is DTC B1423 present?
YES – Continue to step 3.
NO – This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.
3. Using a mirror, is the liquid pipe quick connection connected to the condenser fitting?
YES – This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.
NO – Continue to step 4 to inspect the air conditioning tube assembly (Highlander) or cooler refrigerant liquid pipe A (Highlander Hybrid).
4. Recover ANY remaining refrigerant from the system and disassemble the front of the vehicle to gain access to the connection of the air conditioning tube assembly (Highlander) or cooler refrigerant liquid pipe A (Highlander Hybrid) to the lower portion of the condenser. Follow the steps below for condenser assembly removal.
5. Remove the piping clamp and the two O-rings if the piping clamp remains attached to the air conditioning tube assembly or cooler refrigerant liquid pipe A, where it connects to the condenser assembly.
6. Inspect the air conditioning tube assembly or cooler refrigerant liquid pipe A O-ring surfaces for ANY damage or abnormalities as shown on page 6 of 25.
7. Did the inspection show ANY damage or abnormalities in the O-ring surfaces?
YES – Proceed as follows: • For Highlander vehicles continue to step 8. • For Highlander Hybrid vehicles go to step 10.
NO – Go to step 12.
8. Remove the air conditioning tube assembly (Highlander).
A. While pressing the end of the air conditioning tube assembly into the end of the condenser assembly, use pliers to squeeze together both sides of the piping clamp until it breaks apart.
B. Disconnect the air conditioning tube assembly from the condenser assembly.
C. Remove the two O-rings from the air conditioning tube assembly
D. Remove the piping clamp attached to the air conditioning tube assembly to the No. 2 air conditioning tube and accessory assembly.
E. Install the high side air conditioning line disconnect tool to the piping clamp.
F. Holding the No. 2 air conditioner tube and accessory assembly in one hand, and the air conditioning tube assembly in the other hand, push in the high side air conditioning line disconnect tool with both thumbs.
G. Raise the stopper of the high side air conditioning line disconnect tool and remove together the high side air conditioning line disconnect tool and the piping clamp from the No. 2 air conditioner tube and accessory assembly
H. Remove the piping clamp from the high side air conditioning line disconnect tool.
I. Remove the air conditioning tube assembly from the No. 2 air conditioning tube and accessory assembly.
J. Disconnect the connector from the pressure sensor.
K. Disengage the air conditioning tube assembly from the holder and remove it from the vehic
9. Install the NEW air conditioning tube assembly (Highlander).
A. Remove the protective cap or vinyl tape from the air conditioning tube assembly and the No. 2 air conditioner tube and accessory assembly.
B. Sufficiently apply compressor oil ND-oil 12, or equivalent, to the two NEW O-rings and the fitting surfaces of the No. 2 air conditioner tube and accessory assembly.
C. Install the two new O-rings to the No. 2 air conditioner tube and accessory assembly.
D. Connect the air conditioning tube assembly to the No. 2 air conditioner tube and accessory assembly.
E. Install the piping clamp to the air conditioning tube assembly.
F. Reconnect the connector to the pressure sensor.
G. Go to step 12.
10. Remove the cooler refrigerant liquid pipe A (Highlander Hybrid).
A. While pressing the end of the cooler refrigerant liquid pipe A into the end of the condenser assembly, use pliers to squeeze together both sides of the piping clamp until it breaks apart.
B. Disconnect the cooler refrigerant liquid pipe A.
C. Remove the two O-rings from the cooler refrigerant liquid pipe A.
D. Remove the piping clamp attached to the cooler refrigerant liquid pipe A from the No.1 air conditioning accessory assembly.
E. Install the high side air conditioning line disconnect tool to the piping clamp.
F. Holding the cooler refrigerant liquid pipe A in one hand and the No. 1 air conditioning accessory assembly in the other hand, push in the high side air conditioning line disconnect tool with both thumbs.
G. Raise together the high side air conditioning line disconnect tool stopper AND the piping clamp from the No. 1 Air conditioning accessory assembly.
H. Remove the piping clamp from the high side air conditioning line disconnect tool.
I. Remove the cooler refrigerant pipe A from the No. 1 air conditioning accessory assembly
J. Disconnect the connector from the pressure sensor.
K. Remove the bolt and rotate the hook connector
L. Disconnect the suction pipe sub-assembly from the expansion valve.
M. Remove the O-ring from the suction pipe sub-assembly
N. Disconnect the cooler refrigerant liquid pipe A from the expansion valve.
O. Remove the cooler refrigerant liquid pipe A from the vehicle.
11. Install the NEW cooler refrigerant liquid pipe A (Highlander Hybrid).
A. Remove the protective cap or vinyl tape from the cooler refrigerant liquid pipe A.
B. Sufficiently apply compressor oil ND-oil 11, or equivalent, to a NEW O-ring and the fitting surface of the cooler refrigerant liquid pipe A.
C. Install the O-ring to the cooler refrigerant liquid pipe A.
D. Connect the cooler refrigerant liquid pipe A to the expansion valve.
E. Remove the vinyl tape from the suction pipe sub-assembly.
F. Sufficiently apply compressor oil ND-oil 11, or equivalent, to a NEW O-ring and the fitting surface of the suction pipe sub-assembly.
G. Install the O-ring to the suction pipe sub-assembly.
H. Connect the suction pipe sub-assembly and rotate the hook connector.
I. Install the bolt. Torque: 9.8 N*m (100 kgf*cm, 87*in·lbf)
J. Remove the protective cap or vinyl tape from the cooler refrigerant liquid pipe A and No. 1 air conditioning accessory assembly.
K. Sufficiently apply compressor oil ND-oil 11, or equivalent, to two NEW O-rings and the cooler refrigerant liquid pipe A fitting surfaces
L. Install the two NEW O-rings to the cooler refrigerant liquid pipe A.
M. Connect the cooler refrigerant liquid pipe A to the No. 1 air conditioning accessory assembly.
N. Install the piping clamp to the No. 1 air conditioning accessory assembly.
O. Reconnect the connector to the pressure switch.
12. Inspect the condenser assembly O-ring surface for ANY damage or abnormalities as shown om page 21 of 25.
A. Did the inspection show ANY damage or abnormalities in the O-ring surfaces?
YES – Continue to step 13.
NO – Go to step 15
13. Remove the condenser assembly
14. Install the NEW condenser assembly.
15. Remove the protective cap or vinyl tape from the condenser assembly and air conditioning tube assembly (Highlander) or the cooler refrigerant liquid pipe A (Highlander Hybrid).
16. If a NEW piping clamp is not already installed, install a NEW piping clamp to the air conditioning tube assembly or cooler refrigerant liquid pipe A.
17. Sufficiently apply compressor oil ND-oil 12 or equivalent (Highlander) or ND-oil 11 or equivalent (Highlander Hybrid) to two NEW O-rings and the fitting surfaces of the air conditioning tube assembly or cooler refrigerant liquid pipe A.
18. Install the two NEW O-rings to the air conditioning tube assembly or the cooler refrigerant liquid pipe A.
19. Connect the air conditioning tube assembly or cooler refrigerant liquid pipe A to the condenser assembly.
20. Securely insert the piping clamp to the point where the large diameter section of the piping clamp is covered by the air conditioning tube assembly (Highlander) or cooler refrigerant liquid pipe A (Highlander Hybrid) to the condenser assembly.
21. Did the connection of the piping clamp fully seat and connect to the condenser assembly?
YES – Continue to step 22.
NO – Go back to step 13 and replace the condenser assembly
22. Reassemble the vehicle using the steps for condenser assembly installation.
23. Clear ANY DTCs and confirm normal air conditioning function operation
Applicability:
2020 Highlander, Highlander Hybrid
Introduction:
Some 2020 model year Highlander and Highlander Hybrid vehicles may experience a sudden loss of air conditioning cooling with Diagnostic Trouble Code (DTC) B1423 (Open in Pressure Sensor Circuit/Abnormal Refrigerant Pressure) present. Follow the Repair Procedure in this bulletin to address these conditions.
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 date.
Warranty application is limited to occurrence of the specified condition described in this bulletin.
Repair Procedure:
1. Does the vehicle exhibit a sudden loss of air conditioning cooling?
YES – Continue to step 2.
NO – This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual
2. Using Techstream, check for DTC B1423 (Open in Pressure Sensor Circuit/Abnormal Refrigerant Pressure). Is DTC B1423 present?
YES – Continue to step 3.
NO – This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.
3. Using a mirror, is the liquid pipe quick connection connected to the condenser fitting?
YES – This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.
NO – Continue to step 4 to inspect the air conditioning tube assembly (Highlander) or cooler refrigerant liquid pipe A (Highlander Hybrid).
4. Recover ANY remaining refrigerant from the system and disassemble the front of the vehicle to gain access to the connection of the air conditioning tube assembly (Highlander) or cooler refrigerant liquid pipe A (Highlander Hybrid) to the lower portion of the condenser. Follow the steps below for condenser assembly removal.
5. Remove the piping clamp and the two O-rings if the piping clamp remains attached to the air conditioning tube assembly or cooler refrigerant liquid pipe A, where it connects to the condenser assembly.
6. Inspect the air conditioning tube assembly or cooler refrigerant liquid pipe A O-ring surfaces for ANY damage or abnormalities as shown on page 6 of 25.
7. Did the inspection show ANY damage or abnormalities in the O-ring surfaces?
YES – Proceed as follows: • For Highlander vehicles continue to step 8. • For Highlander Hybrid vehicles go to step 10.
NO – Go to step 12.
8. Remove the air conditioning tube assembly (Highlander).
A. While pressing the end of the air conditioning tube assembly into the end of the condenser assembly, use pliers to squeeze together both sides of the piping clamp until it breaks apart.
B. Disconnect the air conditioning tube assembly from the condenser assembly.
C. Remove the two O-rings from the air conditioning tube assembly
D. Remove the piping clamp attached to the air conditioning tube assembly to the No. 2 air conditioning tube and accessory assembly.
E. Install the high side air conditioning line disconnect tool to the piping clamp.
F. Holding the No. 2 air conditioner tube and accessory assembly in one hand, and the air conditioning tube assembly in the other hand, push in the high side air conditioning line disconnect tool with both thumbs.
G. Raise the stopper of the high side air conditioning line disconnect tool and remove together the high side air conditioning line disconnect tool and the piping clamp from the No. 2 air conditioner tube and accessory assembly
H. Remove the piping clamp from the high side air conditioning line disconnect tool.
I. Remove the air conditioning tube assembly from the No. 2 air conditioning tube and accessory assembly.
J. Disconnect the connector from the pressure sensor.
K. Disengage the air conditioning tube assembly from the holder and remove it from the vehic
9. Install the NEW air conditioning tube assembly (Highlander).
A. Remove the protective cap or vinyl tape from the air conditioning tube assembly and the No. 2 air conditioner tube and accessory assembly.
B. Sufficiently apply compressor oil ND-oil 12, or equivalent, to the two NEW O-rings and the fitting surfaces of the No. 2 air conditioner tube and accessory assembly.
C. Install the two new O-rings to the No. 2 air conditioner tube and accessory assembly.
D. Connect the air conditioning tube assembly to the No. 2 air conditioner tube and accessory assembly.
E. Install the piping clamp to the air conditioning tube assembly.
F. Reconnect the connector to the pressure sensor.
G. Go to step 12.
10. Remove the cooler refrigerant liquid pipe A (Highlander Hybrid).
A. While pressing the end of the cooler refrigerant liquid pipe A into the end of the condenser assembly, use pliers to squeeze together both sides of the piping clamp until it breaks apart.
B. Disconnect the cooler refrigerant liquid pipe A.
C. Remove the two O-rings from the cooler refrigerant liquid pipe A.
D. Remove the piping clamp attached to the cooler refrigerant liquid pipe A from the No.1 air conditioning accessory assembly.
E. Install the high side air conditioning line disconnect tool to the piping clamp.
F. Holding the cooler refrigerant liquid pipe A in one hand and the No. 1 air conditioning accessory assembly in the other hand, push in the high side air conditioning line disconnect tool with both thumbs.
G. Raise together the high side air conditioning line disconnect tool stopper AND the piping clamp from the No. 1 Air conditioning accessory assembly.
H. Remove the piping clamp from the high side air conditioning line disconnect tool.
I. Remove the cooler refrigerant pipe A from the No. 1 air conditioning accessory assembly
J. Disconnect the connector from the pressure sensor.
K. Remove the bolt and rotate the hook connector
L. Disconnect the suction pipe sub-assembly from the expansion valve.
M. Remove the O-ring from the suction pipe sub-assembly
N. Disconnect the cooler refrigerant liquid pipe A from the expansion valve.
O. Remove the cooler refrigerant liquid pipe A from the vehicle.
11. Install the NEW cooler refrigerant liquid pipe A (Highlander Hybrid).
A. Remove the protective cap or vinyl tape from the cooler refrigerant liquid pipe A.
B. Sufficiently apply compressor oil ND-oil 11, or equivalent, to a NEW O-ring and the fitting surface of the cooler refrigerant liquid pipe A.
C. Install the O-ring to the cooler refrigerant liquid pipe A.
D. Connect the cooler refrigerant liquid pipe A to the expansion valve.
E. Remove the vinyl tape from the suction pipe sub-assembly.
F. Sufficiently apply compressor oil ND-oil 11, or equivalent, to a NEW O-ring and the fitting surface of the suction pipe sub-assembly.
G. Install the O-ring to the suction pipe sub-assembly.
H. Connect the suction pipe sub-assembly and rotate the hook connector.
I. Install the bolt. Torque: 9.8 N*m (100 kgf*cm, 87*in·lbf)
J. Remove the protective cap or vinyl tape from the cooler refrigerant liquid pipe A and No. 1 air conditioning accessory assembly.
K. Sufficiently apply compressor oil ND-oil 11, or equivalent, to two NEW O-rings and the cooler refrigerant liquid pipe A fitting surfaces
L. Install the two NEW O-rings to the cooler refrigerant liquid pipe A.
M. Connect the cooler refrigerant liquid pipe A to the No. 1 air conditioning accessory assembly.
N. Install the piping clamp to the No. 1 air conditioning accessory assembly.
O. Reconnect the connector to the pressure switch.
12. Inspect the condenser assembly O-ring surface for ANY damage or abnormalities as shown om page 21 of 25.
A. Did the inspection show ANY damage or abnormalities in the O-ring surfaces?
YES – Continue to step 13.
NO – Go to step 15
13. Remove the condenser assembly
14. Install the NEW condenser assembly.
15. Remove the protective cap or vinyl tape from the condenser assembly and air conditioning tube assembly (Highlander) or the cooler refrigerant liquid pipe A (Highlander Hybrid).
16. If a NEW piping clamp is not already installed, install a NEW piping clamp to the air conditioning tube assembly or cooler refrigerant liquid pipe A.
17. Sufficiently apply compressor oil ND-oil 12 or equivalent (Highlander) or ND-oil 11 or equivalent (Highlander Hybrid) to two NEW O-rings and the fitting surfaces of the air conditioning tube assembly or cooler refrigerant liquid pipe A.
18. Install the two NEW O-rings to the air conditioning tube assembly or the cooler refrigerant liquid pipe A.
19. Connect the air conditioning tube assembly or cooler refrigerant liquid pipe A to the condenser assembly.
20. Securely insert the piping clamp to the point where the large diameter section of the piping clamp is covered by the air conditioning tube assembly (Highlander) or cooler refrigerant liquid pipe A (Highlander Hybrid) to the condenser assembly.
21. Did the connection of the piping clamp fully seat and connect to the condenser assembly?
YES – Continue to step 22.
NO – Go back to step 13 and replace the condenser assembly
22. Reassemble the vehicle using the steps for condenser assembly installation.
23. Clear ANY DTCs and confirm normal air conditioning function operation