DESCRIPTION
When the M1, M2 or M3 switch of the seat memory switch LH is pressed, the outer mirror control ECU assembly sends a switch signal to the main body ECU (multiplex network body ECU) via CAN communication. Then, the main body ECU (multiplex network body ECU) sends a recall request signal to the position control ECU and switch assembly LH. The position control ECU and switch assembly LH operates each motor to move the seat to the memorized position.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
If a memorizing operation has failed, release all of the switches. The seat memory function will not operate unless the switches are released.
If a restoring operation has failed, release all of the switches. The seat memory restoring function will not operate unless the switches are released.
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PROCEDURE
1. | CHECK FRONT POWER SEAT CONTROL OPERATION |
(a) Check that each function of the power seat operates normally by using the position control ECU and switch assembly LH.
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OK:
Each function of the power seat operates normally using the position control ECU and switch assembly LH.
NG | GO TO PROBLEM SYMPTOMS TABLE |
|
2. | CHECK SEAT POSITION MEMORY FUNCTION |
(a) Check the seat position memory function.
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OK:
Seat position memory function is normal.
NG | GO TO OTHER DIAGNOSIS PROCEDURE (Power Seat Position is not Memorized) |
|
3. | CHECK SEAT POSITION RESTORING FUNCTION |
(a) Under each of the following conditions, check that the seat position restoring function operates by pressing the M1, M2 or M3 switch.
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Result | Proceed to |
---|---|
Seat position restoring function does not operate at all. | A |
Seat position restoring function does not operate when the condition is *1. | B |
| C |
B | GO TO STEP 9 |
C | GO TO STEP 10 |
|
4. | READ VALUE USING TECHSTREAM (SEAT POSITION MEMORY) |
(a) Store a seat position in memory for the M1, M2 and M3 switches.
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(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG).
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / Driver Seat / Data List.
(f) Read the Data List according to the display on the Techstream.
Body Electrical > Driver Seat > Data List Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
---|---|---|---|---|
Seat Memory No1 | Seat position memorized with M1 switch | Mem or Not Mem | Mem: Memorized Not Mem: Not memorized | - |
Seat Memory No2 | Seat position memorized with M2 switch | Mem or Not Mem | Mem: Memorized Not Mem: Not memorized | - |
Seat Memory No3 | Seat position memorized with M3 switch | Mem or Not Mem | Mem: Memorized Not Mem: Not memorized | - |
Tester Display |
---|
Seat Memory No1 |
Seat Memory No2 |
Seat Memory No3 |
OK:
Mem is displayed on the Techstream screen.
NG | GO TO OTHER DIAGNOSIS PROCEDURE (Power Seat Position is not Memorized) |
|
5. | REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (DRIVER DOOR) |
(a) Replace the outer mirror control ECU assembly (driver door) with a new or known good one.
Click here
|
6. | CHECK SEAT POSITION MEMORY AND RESTORING FUNCTION |
(a) Check the seat position memory and restoring functions.
Click here
OK:
Seat position memory and restoring functions operate normally.
OK | END (OUTER MIRROR CONTROL ECU ASSEMBLY (DRIVER DOOR) WAS DEFECTIVE) |
|
7. | REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY LH |
(a) Replace the position control ECU and switch assembly LH with a new or known good one.
Click here
|
8. | CHECK SEAT POSITION MEMORY AND RESTORING FUNCTION |
(a) Check the seat position memory and restoring functions.
Click here
OK:
Seat position memory and restoring functions operate normally.
OK | END (POSITION CONTROL ECU AND SWITCH ASSEMBLY LH WAS DEFECTIVE) |
NG | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
9. | READ VALUE USING TECHSTREAM (SHIFT P POSITION STATE) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Driver Seat / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Driver Seat > Data List Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
---|---|---|---|---|
P Switch | Park state signal | ON or OFF | ON: Shift lever in P OFF: Shift lever in a position other than P | - |
Tester Display |
---|
P Switch |
OK:
On the Techstream screen, ON or OFF is displayed accordingly.
OK | REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY LH |
NG | GO TO AUTOMATIC TRANSAXLE SYSTEM (P0705) |
10. | READ VALUE USING TECHSTREAM (DRIVER DOOR COURTESY SWITCH) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Main Body > Data List Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
---|---|---|---|---|
FL Door Courtesy SW | Front door courtesy light switch assembly (driver door) signal* | ON or OFF | ON: Driver door open OFF: Driver door closed | - |
Tester Display |
---|
FL Door Courtesy SW |
OK:
On the Techstream screen, ON or OFF is displayed accordingly.
OK | REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY LH |
NG | GO TO LIGHTING SYSTEM (Door Courtesy Switch Circuit) |
Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Dynamic Radar Cruise Control System: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Before performing troubleshooting for the dynamic radar cruise control system, perform troubleshooting for the pre-collision system.
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*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. CUSTOMER PRO ...
Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Roof Drip Side Finish Moulding: Installation
INSTALLATION CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
PROCEDURE 1. INSTALL ROOF DRIP SIDE FINISH MOULDING CLIP NOTICE: When installing new roof drip side finish moulding clips, remove any double-sided tape r ...