DESCRIPTION When the M1 or
M2 switch of the seat memory switch 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 assembly. The position control ECU assembly
operates each motor to move the seat to the memorized position. WIRING DIAGRAM
 CAUTION / NOTICE / HINT
NOTICE:
- The seat position will not be stored if the SET switch and 2 or more of
the seat memory switches (for example, M1 switch and M2 switch) are
pressed simultaneously.
If a memorizing operation has failed, release all of
the switches. The seat memory function will not operate unless the
switches are released.
- The seat will not return to the memorized position if 2 or more of the
seat memory switches (for example, M1 switch and M2 switch) are pressed
simultaneously.
If a restoring operation has failed, release all of the
switches. The seat memory restoring function will not operate unless
the switches are released.
- The front power seat control system (w/ Memory) uses the CAN
communication system. First, confirm that there are no malfunctions in
the CAN communication system. Refer to How to Proceed with
Troubleshooting.
Click here 
- Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
Click here
PROCEDURE |
1. | CHECK FRONT POWER SEAT CONTROL OPERATION |
(a) Check that each function of the power seat operates normally by using the front power seat switch LH.
Click here OK: Each function of the power seat operates normally using the front power seat switch LH.
| NG |
 | GO TO PROBLEM SYMPTOMS TABLE |
|
OK |
 | |
| 2. |
CHECK SEAT POSITION MEMORY FUNCTION | (a) Check the seat position memory function.
Click here OK: Seat position memory function is normal.
| NG |
| GO TO OTHER DIAGNOSIS PROCEDURE (Power Seat Position is not Memorized) |
|
OK | |
| |
| 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 or M2 switch. Click here
- The engine switch is on (IG), and the shift lever is in P.*1
- Within 180 seconds after the driver door is opened with the engine switch off.*2
- Within 60 seconds after the driver door is opened and then closed with the engine switch off.*3
|
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 |
- Seat position restoring function does not operate when the condition is *2.
- Seat position restoring function does not operate when the condition is *3.
| C |
| B |
| GO TO STEP 7 |
| C |
| GO TO STEP 10 |
|
A | |
| |
| 4. |
READ VALUE USING TECHSTREAM (SEAT POSITION MEMORY) |
(a) Store a seat position in memory for the M1 and M2 switches. Click here
(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 |
- | Body Electrical > Driver Seat > Data List
|
Tester Display | | Seat Memory No1 | |
Seat Memory No2 | OK: Mem is displayed on the Techstream screen.
| NG |
| GO TO OTHER DIAGNOSIS PROCEDURE (Power Seat Position is not Memorized) |
|
OK | |
| |
| 5. |
REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY LH |
(a) Replace the outer mirror control ECU assembly LH with a new or known good one.
Click here
|
NEXT | |
| |
| 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 LH WAS DEFECTIVE) |
| NG |
| GO TO STEP 8 |
| 7. |
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: Powertrain / Engine / Data List.
(e) Read the Data List according to the display on the Techstream. Powertrain > Engine > Data List
|
Tester Display | Measurement Item |
Range | Normal Condition |
Diagnostic Note | |
Shift SW Status (P Range) |
Park/neutral position switch status |
ON or OFF | ON: Shift lever in P
OFF: Shift lever not in P |
- | Powertrain > Engine > Data List
|
Tester Display | | Shift SW Status (P Range) |
OK: On the Techstream screen, ON or OFF is displayed accordingly.
| NG |
| GO TO AUTOMATIC TRANSAXLE SYSTEM (P070513) |
|
OK | |
| |
| 8. |
REPLACE POSITION CONTROL ECU ASSEMBLY |
(a) Replace the position control ECU assembly with a new or known good one.
Click here
|
NEXT | |
| |
| 9. |
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 ASSEMBLY WAS DEFECTIVE) |
| NG |
| REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| 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 |
- | Body Electrical > Main Body > Data List
|
Tester Display | | FL Door Courtesy SW |
OK: On the Techstream screen, ON or OFF is displayed accordingly.
| OK |
| REPLACE POSITION CONTROL ECU ASSEMBLY |
| NG |
| GO TO LIGHTING SYSTEM (Front Door Courtesy Switch Circuit) | | 
