RM38N0EC _58 Vehicle Interior _111839 SEAT _0505694 FRONT POWER SEAT CONTROL SYSTEM(w/ Memory) J

SEAT  FRONT POWER SEAT CONTROL SYSTEM(w/ Memory)  Front Power Seat does not Operate with Front Power Seat Switch  


DESCRIPTION

Signals are input into the position control ECU assembly. The built-in ECU manages the signals received from the power seat switch and operates each motor. If the position control ECU assembly receives more than 2 motor operation signals for the same motor, the motor will be stopped. Manual operation resumes when the position control ECU assembly receives only 1 signal.

WIRING DIAGRAM

for SFTM Made


B647018E01
1,0.271 2.885,0.563 1.885,0.292 10 false from Auxiliary Battery 0.99,0.833 2.875,1.125 1.885,0.292 10 false from Auxiliary Battery 1,1.406 2.885,1.698 1.885,0.292 10 false from IGR NO. 1 Relay 3.229,0.469 5.115,0.76 1.885,0.292 10 false ECU-DCC NO. 2 3.375,1 5.26,1.292 1.885,0.292 10 false P/SEAT D 3.281,1.583 4.396,1.813 1.115,0.229 10 false ECU-IGR NO. 1 4.802,0.313 5.292,0.542 0.49,0.229 10 false U35 4.813,1.417 5.302,1.646 0.49,0.229 10 false U35 4.813,2.26 5.302,2.49 0.49,0.229 10 false U33 4.844,0.083 5.333,0.313 0.49,0.229 10 false 15 4.885,0.635 5.375,0.865 0.49,0.229 10 false 3 4.885,1.177 5.375,1.406 0.49,0.229 10 false 1 5.24,0.292 5.885,0.573 0.646,0.281 10 false SYSB 5.24,0.854 5.885,1.135 0.646,0.281 10 false +B 5.24,1.417 5.885,1.698 0.646,0.281 10 false IG 4.781,2.917 6.948,3.396 2.167,0.479 10 false Position Control ECU Assembly 0.875,2.635 1.833,2.917 0.958,0.281 10 false U37 0.885,2.792 3.26,3.031 2.375,0.24 10 false Front Power Seat Switch LH 2.74,2.135 3.229,2.365 0.49,0.229 10 false 20 4.823,0.865 5.313,1.094 0.49,0.229 10 false U33 4.896,2.021 5.385,2.25 0.49,0.229 10 false 2 5.271,2.271 5.917,2.552 0.646,0.281 10 false GND 2.344,2.26 2.833,2.49 0.49,0.229 10 false GND


for GTMC Made


B613104E07
1,0.271 2.885,0.563 1.885,0.292 10 false from Auxiliary Battery 0.99,0.833 2.875,1.125 1.885,0.292 10 false from Auxiliary Battery 1,1.406 2.885,1.698 1.885,0.292 10 false from IGR NO. 1 Relay 3.229,0.469 5.115,0.76 1.885,0.292 10 false ECU-DCC NO. 2 3.375,1 5.26,1.292 1.885,0.292 10 false P/SEAT D 3.281,1.583 4.396,1.813 1.115,0.229 10 false ECU-IGR NO. 1 4.802,0.313 5.292,0.542 0.49,0.229 10 false U35 4.813,1.417 5.302,1.646 0.49,0.229 10 false U35 6.417,0.792 6.906,1.021 0.49,0.229 10 false U54 4.813,2.25 5.302,2.479 0.49,0.229 10 false U35 4.844,0.073 5.333,0.302 0.49,0.229 10 false 15 4.885,0.615 5.375,0.844 0.49,0.229 10 false 3 4.885,1.177 5.375,1.406 0.49,0.229 10 false 1 4.854,2.01 5.344,2.24 0.49,0.229 10 false 12 5.24,0.292 5.885,0.573 0.646,0.281 10 false SYSB 5.24,0.854 5.885,1.135 0.646,0.281 10 false +B 5.24,1.417 5.885,1.698 0.646,0.281 10 false IG 5.229,2.25 5.875,2.531 0.646,0.281 10 false SGND 4.781,2.917 6.948,3.396 2.167,0.479 10 false Position Control ECU Assembly 0.875,2.635 1.833,2.917 0.958,0.281 10 false U37 0.885,2.792 3.26,3.031 2.375,0.24 10 false Front Power Seat Switch LH 2.74,2.135 3.229,2.365 0.49,0.229 10 false 20 4.813,0.865 5.302,1.094 0.49,0.229 10 false U54 6.49,0.552 6.979,0.781 0.49,0.229 10 false 2 5.969,0.792 6.615,1.073 0.646,0.281 10 false GND 2.333,2.271 2.823,2.5 0.49,0.229 10 false GND


CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.


PROCEDURE

1.CHECK FRONT POWER SEAT OPERATION
a.

Check that each function of the power seat operates normally by using the front power seat switch LH.

Click hereVehicle Interior>SEAT>FRONT POWER SEAT CONTROL SYSTEM (w/ Memory)>OPERATION CHECK


Result:
Result Proceed to
All power seat functions do not operate A
One or more power seat functions do not operate B



A

2.INSPECT FRONT POWER SEAT SWITCH LH

B

GO TO OTHER DIAGNOSIS PROCEDURE (One or more Power Seat Motors do not Operate)

Click hereVehicle Interior>SEAT>FRONT POWER SEAT CONTROL SYSTEM (w/ Memory)>One or more Power Seat Motors do not Operate


3.CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - POWER SUPPLY)
a.

Disconnect the U33*1 or U54*2 and U35 position control ECU assembly connectors.

*1: for SFTM Made

*2: for GTMC Made



b.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:
for SFTM Made
Tester Connection Condition Specified Condition

Click Location & Routing(U33,U35)Location & Routing

Click Connector(U33)Seat>Front Seat Wire RH / Front Seat Wire LH>Position Control ECU Assembly LH

Click Connector(U35)Seat>Front Seat Wire RH / Front Seat Wire LH>Position Control ECU Assembly LH

U33-3 (+B) - Body ground Ignition switch off 11 to 14 V
U35-15 (SYSB) - Body ground Ignition switch off 11 to 14 V
U35-1 (IG) - Body ground Ignition switch ON 11 to 14 V
U35-1 (IG) - Body ground Ignition switch off Below 1 V


for GTMC Made
Tester Connection Condition Specified Condition

Click Location & Routing(U54,U35)Location & Routing

Click Connector(U54)Seat>Front Seat Wire RH / Front Seat Wire LH>Position Control ECU Assembly LH

Click Connector(U35)Seat>Front Seat Wire RH / Front Seat Wire LH>Position Control ECU Assembly LH

U54-3 (+B) - Body ground Ignition switch off 11 to 14 V
U35-15 (SYSB) - Body ground Ignition switch off 11 to 14 V
U35-1 (IG) - Body ground Ignition switch ON 11 to 14 V
U35-1 (IG) - Body ground Ignition switch off Below 1 V


Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - BODY GROUND)
a.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
for SFTM Made
Tester Connection Condition Specified Condition

Click Location & Routing(U33)Location & Routing

Click Connector(U33)Seat>Front Seat Wire RH / Front Seat Wire LH>Position Control ECU Assembly LH

U33-2 (GND) - Body ground Always Below 1 Ω

for GTMC Made
Tester Connection Condition Specified Condition

Click Location & Routing(U54)Location & Routing

Click Connector(U54)Seat>Front Seat Wire RH / Front Seat Wire LH>Position Control ECU Assembly LH

U54-2 (GND) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

5.CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - POSITION CONTROL ECU ASSEMBLY OR BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - POSITION CONTROL ECU ASSEMBLY OR BODY GROUND)
a.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
for SFTM Made
Tester Connection Condition Specified Condition

Click Location & Routing(U37)Location & Routing

Click Connector(U37)Seat>Front Seat Wire RH / Front Seat Wire LH>Front Power Seat Switch LH

U37-20 (GND) - Body ground Always Below 1 Ω

for GTMC Made
Tester Connection Condition Specified Condition

Click Location & Routing(U37,U35)Location & Routing

Click Connector(U37)Seat>Front Seat Wire RH / Front Seat Wire LH>Front Power Seat Switch LH

Click Connector(U35)Seat>Front Seat Wire RH / Front Seat Wire LH>Position Control ECU Assembly LH

U37-20 (GND) - U35-12 (SGND) Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE POSITION CONTROL ECU ASSEMBLY

for SFTM Made: Click hereVehicle Interior>SEAT>POWER SEAT CONTROL ECU (for SFTM Made)>REMOVAL

for GTMC Made: Click hereVehicle Interior>SEAT>POWER SEAT CONTROL ECU (for GTMC Made)>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR