DESCRIPTION
The refreshing seat switch (for front side) communicates with the air conditioning amplifier assembly via LIN communication.
If the LIN communication system is malfunctioning, the air conditioning amplifier assembly will not operate even if the refreshing seat switch (for front side) is operated.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
---|---|---|---|
B14B5 | Lost Communication with Front Seat Temperature Adjustment Switch LIN | Lost communication with the refreshing seat switch |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
1. | CLEAR DTC |
(a) Clear the DTCs.
Click here
|
2. | CHECK FOR DTC |
(a) Check for DTCs.
Click here
OK:
DTC B14B5 is not output.
OK | ![]() | USE SIMULATION METHOD TO CHECK |
|
3. | CHECK HARNESS AND CONNECTOR (IG POWER SUPPLY - REFRESHING SEAT SWITCH - BODY GROUND) |
(a) Disconnect the J82 refreshing seat switch (for front side) switch connector. |
|
(b) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Condition | Specified Condition |
---|---|---|
J82-2 (IG) - Body ground | Engine switch on (IG) | 11 to 14 V |
J82-2 (IG) - Body ground | Engine switch off | Below 1 V |
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
J82-7 (E) - Body ground | Always | Below 1 Ω |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. | CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - REFRESHING SEAT SWITCH (FOR FRONT SIDE)) |
(a) Disconnect the J43 air conditioning amplifier assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
J43-14 (LIN1) - J82-4 (LIN1) | Always | Below 1 Ω |
J43-14 (LIN1) or J82-4 (LIN1) - Body ground | Always | 10 kΩ or higher |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. | REPLACE REFRESHING SEAT SWITCH (FOR FRONT SIDE) |
(a) Temporarily replace the refreshing seat switch (for front side) with a new or known good one.
Click here
|
6. | CLEAR DTC |
(a) Clear the DTCs.
Click here
|
7. | CHECK FOR DTC |
(a) Check for DTCs.
Click here
OK:
DTC B14B5 is not output.
OK | ![]() | END (REFRESHING SEAT SWITCH WAS DEFECTIVE) |
NG | ![]() | REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY |
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Drive Belt: Precaution
PRECAUTION NOTICE:
Do not apply or add any oil or grease to the belt tensioner to prevent abnormal noises from the belt tensioner pulley, belt squealing, etc.
Do not allow oil or grease to adhere to the moving parts of the belt tensioner, as this may cause malfunctions.
If oil or grease ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Power Seat Switch(w/o Seat Position Memory System): Installation
INSTALLATION CAUTION / NOTICE / HINT CAUTION: Wear protective gloves. Sharp areas on the parts may injure your hands. HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
PROCEDURE 1. INSTALL FRONT POWER SEAT SWITCH (a) Install the front po ...