RM38N0EC _58 Vehicle Interior _111839 SEAT _0505696 SEAT HEATER SYSTEM J

SEAT SEAT HEATER SYSTEM Seat Heater for Front Right Seat does not Operate

DESCRIPTION

When the seat heater switch of the front seat heater switch (refreshing seat switch) is operated, the air conditioning amplifier assembly receives a signal and operates the front seat heater.

WIRING DIAGRAM

0.865,0.667 1.479,0.865 0.615,0.198 10 false LIN1 1.219,4.802 1.677,5 0.458,0.198 10 false E44 2.104,1.49 3.479,1.688 1.375,0.198 10 false S/HTR F/R 3.104,1.344 5.156,1.688 2.052,0.344 10 false from S/HTR FR Relay 4.823,1.01 5.281,1.208 0.458,0.198 10 false L9 4.823,1.188 6.531,1.563 1.708,0.375 10 false Front Seat Heater Switch (Refreshing Seat Switch) 5.115,0.667 5.656,0.958 0.542,0.292 10 false SLIN 3.854,4.719 5.531,5.271 1.677,0.552 10 false Front Seat Cushion Heater Assembly RH 0.094,5.219 1.667,5.854 1.573,0.635 10 false Air Conditioning Amplifier Assembly 0.833,6.292 4.5,6.49 3.667,0.198 10 false : LIN Communication Line 1.26,4.615 1.583,4.958 0.323,0.344 10 false 17 4.979,0.51 5.302,0.729 0.323,0.219 10 false 8 0.823,4.792 1.281,4.99 0.458,0.198 10 false GND 1.26,4.01 1.708,4.385 0.448,0.375 10 false 12 1.219,4.208 1.677,4.406 0.458,0.198 10 false E46 0.74,4.188 1.198,4.385 0.458,0.198 10 false SM1R 1.208,0.677 1.667,0.875 0.458,0.198 10 false E44 3.604,4.198 4.063,4.396 0.458,0.198 10 false U5 5.656,4.729 7.115,5.281 1.458,0.552 10 false Front Seatback Heater Assembly RH 3.656,1.979 3.813,2.177 0.156,0.198 10 false 2 3.656,3.125 3.813,3.323 0.156,0.198 10 false 1 5.427,2.167 5.885,2.365 0.458,0.198 10 false B 5.417,2.865 5.875,3.063 0.458,0.198 10 false B 3.615,3.302 4.073,3.5 0.458,0.198 10 false U5 3.604,2.156 4.063,2.354 0.458,0.198 10 false U5 3.656,4.01 3.813,4.208 0.156,0.198 10 false 6 1.313,0.469 1.469,0.667 0.156,0.198 10 false 7

CAUTION / NOTICE / HINT

NOTICE:: ·

If the auxiliary battery voltage becomes low, auxiliary battery load control will operate in order to ensure sufficient power is supplied to the power steering system. In this case, the seat heater system may not operate.

·

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

PROCEDURE

1.CLEAR DTC

Clear the DTCs.

Body Electrical > Air Conditioner > Clear DTCs: 50002 450

Result:

Proceed to
NEXT

2.CHECK FOR DTC

Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes: 50001 450

OK:: DTC B14C011, B14C015 and B14B587 are not output.

Result:

Proceed to
OK
NG

3.PERFORM ACTIVE TEST USING GTS

GO TO DIAGNOSTIC TROUBLE CODE CHART

Click hereVehicle Interior>SEAT>SEAT HEATER SYSTEM>DIAGNOSTIC TROUBLE CODE CHART202203,999999,_58,_111839,_0505696,RM1000000022RFD,

3.PERFORM ACTIVE TEST USING GTS

Perform the Active Test according to the display on the GTS.

Body Electrical > Air Conditioner > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Front Right Seat Heater	Front seat RH side seat heater operation	OFF or ON	-

Body Electrical > Air Conditioner > Active Test

Tester Display
Front Right Seat Heater

50004 450 17

OK:: The seat heater operates normally.

Result:

Proceed to
OK
NG

REPLACE FRONT SEAT HEATER SWITCH (REFRESHING SEAT SWITCH)

Click hereVehicle Interior>SEAT>SEAT HEATER SWITCH>REMOVAL202111,999999,_58,_111839,_0500783,RM100000001Z3FF,

4.INSPECT FRONT SEATBACK HEATER ASSEMBLY RH

for SFTM Made: Click hereVehicle Interior>SEAT>FRONT SEATBACK HEATER (for SFTM Made)>INSPECTION202111,999999,_58,_111839,_0500779,RM100000001Z3EZ,

for GTMC Made: Click hereVehicle Interior>SEAT>FRONT SEATBACK HEATER (for GTMC Made)>INSPECTION202203,999999,_58,_111839,_0525814,RM10000000229GV,

Result:

Proceed to
OK
NG

5.INSPECT FRONT SEAT CUSHION HEATER ASSEMBLY RH

REPLACE FRONT SEAT BACK HEATER ASSEMBLY RH

for SFTM Made: Click hereVehicle Interior>SEAT>FRONT SEATBACK HEATER (for SFTM Made)>REMOVAL202203,202303,_58,_111839,_0500779,RM1000000022EHS,202303,202406,_58,_111839,_0500779,RM100000002B4XU,202406,999999,_58,_111839,_0500779,RM100000002MQTH,

for GTMC Made: Click hereVehicle Interior>SEAT>FRONT SEATBACK HEATER (for GTMC Made)>REMOVAL202203,202303,_58,_111839,_0525814,RM10000000229GY,202303,202406,_58,_111839,_0525814,RM100000002B4XT,202406,999999,_58,_111839,_0525814,RM100000002MQS6,

5.INSPECT FRONT SEAT CUSHION HEATER ASSEMBLY RH

for SFTM Made: Click hereVehicle Interior>SEAT>FRONT SEAT CUSHION HEATER (for SFTM Made)>INSPECTION202111,999999,_58,_111839,_0500780,RM100000001Z3F3,

for GTMC Made: Click hereVehicle Interior>SEAT>FRONT SEAT CUSHION HEATER (for GTMC Made)>INSPECTION202203,999999,_58,_111839,_0525815,RM10000000229GZ,

Result:

Proceed to
OK
NG

6.CHECK HARNESS AND CONNECTOR (FRONT SEAT CUSHION HEATER ASSEMBLY RH - POWER SUPPLY AND BODY GROUND)

REPLACE FRONT SEAT CUSHION HEATER ASSEMBLY RH

for SFTM Made: Click hereVehicle Interior>SEAT>FRONT SEAT CUSHION HEATER (for SFTM Made)>REMOVAL202203,202303,_58,_111839,_0500780,RM1000000022EHR,202303,202406,_58,_111839,_0500780,RM100000002B4XW,202406,999999,_58,_111839,_0500780,RM100000002MQTN,

for GTMC Made: Click hereVehicle Interior>SEAT>FRONT SEAT CUSHION HEATER (for GTMC Made)>REMOVAL202203,202303,_58,_111839,_0525815,RM10000000229H2,202303,202406,_58,_111839,_0525815,RM100000002B4XV,202406,999999,_58,_111839,_0525815,RM100000002MQTL,

6.CHECK HARNESS AND CONNECTOR (FRONT SEAT CUSHION HEATER ASSEMBLY RH - POWER SUPPLY AND BODY GROUND)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Click Location & Routing(U5)Location & Routingewd_type=routing;type=c;code=U5 Click Connector(U5)Seat>Front Seat Wire RH / Front Seat Wire LH>Front Seat Cushion Heater Assembly RHewd_type=component;type=c;code=U5;pinno=2
U5-2 - Body ground	Always	Below 1 Ω

Tester Connection

Condition

Specified Condition

Click Location & Routing(U5)Location & Routingewd_type=routing;type=c;code=U5

Click Connector(U5)Seat>Front Seat Wire RH / Front Seat Wire LH>Front Seat Cushion Heater Assembly RHewd_type=component;type=c;code=U5;pinno=2

U5-2 - Body ground

Always

Below 1 Ω

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
Click Location & Routing(U5)Location & Routingewd_type=routing;type=c;code=U5 Click Connector(U5)Seat>Front Seat Wire RH / Front Seat Wire LH>Front Seat Cushion Heater Assembly RHewd_type=component;type=c;code=U5;pinno=1
U5-1 - Body ground	Ignition switch ON	11 to 14 V
U5-1 - Body ground	Ignition switch off	Below 1 V

Tester Connection

Condition

Specified Condition

Click Location & Routing(U5)Location & Routingewd_type=routing;type=c;code=U5

Click Connector(U5)Seat>Front Seat Wire RH / Front Seat Wire LH>Front Seat Cushion Heater Assembly RHewd_type=component;type=c;code=U5;pinno=1

U5-1 - Body ground

Ignition switch ON

11 to 14 V

U5-1 - Body ground

Ignition switch off

Below 1 V

Result:

Proceed to
OK
NG

7.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - FRONT SEAT CUSHION HEATER ASSEMBLY RH)

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - FRONT SEAT CUSHION HEATER ASSEMBLY RH)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Click Location & Routing(E46,U5)Location & Routingewd_type=routing;type=c,c;code=E46,U5 Click Connector(E46)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Air Conditioning Amplifier Assemblyewd_type=component;type=c;code=E46;pinno=12 Click Connector(U5)Seat>Front Seat Wire RH / Front Seat Wire LH>Front Seat Cushion Heater Assembly RHewd_type=component;type=c;code=U5;pinno=6
E46-12 (SM1R) - U5-6	Always	Below 1 Ω
E46-12 (SM1R) or U5-6 - Body ground	Always	10 kΩ or higher

Tester Connection

Condition

Specified Condition

Click Location & Routing(E46,U5)Location & Routingewd_type=routing;type=c,c;code=E46,U5

Click Connector(E46)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Air Conditioning Amplifier Assemblyewd_type=component;type=c;code=E46;pinno=12

Click Connector(U5)Seat>Front Seat Wire RH / Front Seat Wire LH>Front Seat Cushion Heater Assembly RHewd_type=component;type=c;code=U5;pinno=6

E46-12 (SM1R) - U5-6

Always

Below 1 Ω

E46-12 (SM1R) or U5-6 - Body ground

Always

10 kΩ or higher

Result:

Proceed to
OK
NG

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING AMPLIFIER>REMOVAL202111,999999,_58,_111841,_0499808,RM100000001Z0AA,

REPAIR OR REPLACE HARNESS OR CONNECTOR