SEAT FRONT POWER SEAT CONTROL SYSTEM(w/ Memory) Power Seat Position is not Memorized
DESCRIPTION
The position control ECU assembly receives seat memory switch signals from the outer mirror control ECU assembly LH via CAN communication. If the SET switch is being pressed when one of the M1 or M2 switches is pressed, or if one of the M1 or M2 switches is pressed within 3 seconds of pressing the SET switch, the main body ECU (multiplex network body ECU) sends a memory request signal to the position control ECU assembly. After receiving the request signal, the position control ECU assembly memorizes the location data of each motor.
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.
·Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.
PROCEDURE
Check that each function of the power seat operates normally by using the front power seat switch LH.
- OK:
Each function of the power seat operates normally using the front power seat switch LH.
- Result:
Proceed to OK NG
OK
NG
Read the Data List according to the display on the GTS.
- Body Electrical > Mirror L > Data List
-
Tester Display Measurement Item Range Normal Condition Diagnostic Note Seat Memory Switch1 M1 switch OFF or ON OFF: M1 switch off
ON: M1 switch on- Seat Memory Switch2 M2 switch OFF or ON OFF: M2 switch off
ON: M2 switch on- Seat Memory Set SW SET switch OFF or ON OFF: SET switch off
ON: SET switch on-
- Body Electrical > Mirror L > Data List
-
Tester Display Seat Memory Switch1 Seat Memory Switch2 Seat Memory Set SW - 50003 225 1,2,4
- OK:
On the GTS screen, ON or OFF is displayed accordingly.
- Result:
Proceed to OK NG
OK
NG
Perform the Active Test according to the display on the GTS.
- Body Electrical > Driver Seat > Active Test
-
Tester Display Measurement Item Control Range Diagnostic Note Buzzer Buzzer operation OFF/ON -
- Body Electrical > Driver Seat > Active Test
-
Tester Display Buzzer - 50004 162 5
- OK:
Buzzer sounds normally.
- Result:
Proceed to OK NG
OK
NG
for SFTM Made: Click hereVehicle Interior>SEAT>POWER SEAT CONTROL ECU (for SFTM Made)>REMOVAL202203,202303,_58,_111839,_0500782,RM1000000022EHU,202303,202406,_58,_111839,_0500782,RM100000002B4Y0,202406,999999,_58,_111839,_0500782,RM100000002MQQP,
for GTMC Made: Click hereVehicle Interior>SEAT>POWER SEAT CONTROL ECU (for GTMC Made)>REMOVAL202203,202303,_58,_111839,_0525817,RM10000000229H8,202303,202406,_58,_111839,_0525817,RM100000002B4XZ,202406,999999,_58,_111839,_0525817,RM100000002MQQR,
Replace the outer mirror control ECU assembly LH with a new or known good one.
- Result:
Proceed to NEXT
NEXT
Check the seat position memory and restoring functions.
- OK:
Seat position memory and restoring functions operate normally.
- Result:
Proceed to OK NG
OK
NG
Replace the position control ECU assembly with a new or known good one.
for SFTM Made: Click hereVehicle Interior>SEAT>POWER SEAT CONTROL ECU (for SFTM Made)>REMOVAL202203,202303,_58,_111839,_0500782,RM1000000022EHU,202303,202406,_58,_111839,_0500782,RM100000002B4Y0,202406,999999,_58,_111839,_0500782,RM100000002MQQP,
for GTMC Made: Click hereVehicle Interior>SEAT>POWER SEAT CONTROL ECU (for GTMC Made)>REMOVAL202203,202303,_58,_111839,_0525817,RM10000000229H8,202303,202406,_58,_111839,_0525817,RM100000002B4XZ,202406,999999,_58,_111839,_0525817,RM100000002MQQR,
- Result:
Proceed to NEXT
NEXT
Check the seat position memory and restoring functions.
- OK:
Seat position memory and restoring functions operate normally.
- Result:
Proceed to OK NG
OK
NG
- Result:
Proceed to OK NG
OK
NG
Click hereVehicle Interior>SEAT>SEAT MEMORY SWITCH>REMOVAL202111,999999,_58,_111839,_0500776,RM100000001Z3EN,
Disconnect the G22 outer mirror control ECU assembly LH connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Click Location & Routing(G22,I7)Location & Routingewd_type=routing;type=c,c;code=G22,I7
Click Connector(G22)Body>Front Door Wire RH / Front Door Wire LH>Outer Mirror Control ECU Assembly LHewd_type=component;type=c;code=G22;pinno=1,2,3,7
Click Connector(I7)Body>No. 2 Front Door Wire RH / No. 2 Front Door Wire LH>Seat Memory Switchewd_type=component;type=c;code=I7;pinno=3,2,4,1
G22-1 (MM) - I7-3 (MMRY) Always Below 1 Ω G22-1 (MM) or I7-3 (MMRY) - Body ground Always 10 kΩ or higher G22-2 (M1) - I7-2 (1) Always Below 1 Ω G22-2 (M1) or I7-2 (1) - Body ground Always 10 kΩ or higher G22-3 (M2) - I7-4 (2) Always Below 1 Ω G22-3 (M2) or I7-4 (2) - Body ground Always 10 kΩ or higher G22-7 (GND) - Body ground Always Below 1 Ω I7-1 (E) - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG