RM35X0E _58 Vehicle Interior _078601 SEAT _0396768 SEAT HEATER SYSTEM U

SEAT  SEAT HEATER SYSTEM  TERMINALS OF ECU  


REAR SEAT CLIMATE CONTROL ECU (REAR NO. 1 LH)


E313799N01
3.333,0.167 3.729,0.396 0.396,0.229 3.406,0.198 3.865,0.396 0.458,0.198 10 false v12

a.

Disconnect the v12 rear seat climate control ECU (rear No. 1 LH) connector.


b.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.


Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
v12-3 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
v12-12 (IG) - Body ground B - Body ground Ignition power supply Engine switch on (IG) 11 to 14 V
Engine switch off Below 1 V
v12-13 (+B) - Body ground P - Body ground Battery power supply Always 11 to 14 V


c.

Reconnect the v12 rear seat climate control ECU (rear No. 1 LH) connector.


d.

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

Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
v12-2 (HTR-) - Body ground GR - Body ground Seat heater ground Always Below 1 Ω
v12-7 (HSWM) - Body ground L - Body ground Seat heater switch signal
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 1 LH]) off


11 to 14 V
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 1 LH]) on


Below 1 V
v12-11 (HTR+) - Body ground W - Body ground Seat heater drive signal
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 1 LH]) off


Below 1 V
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 1 LH]) on


11 to 14 V
v12-15 (TMT+) - Body ground SB - Body ground Seat heater sensor input signal - -
v12-16 (TMT-) - Body ground BR - Body ground Seat heater sensor input signal - -


e.

Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
v12-1 (IND1) - Body ground LG - Body ground Seat heater indicator light (LO) signal
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 1 LH]) on (LO)


Pulse generation
v12-24 (HSWI) - Body ground R - Body ground Seat heater indicator light (HI) signal
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 1 LH]) on (HI)


Pulse generation



REAR SEAT CLIMATE CONTROL ECU (REAR NO. 1 RH)


E313799N02
3.333,0.167 3.729,0.396 0.396,0.229 3.438,0.198 3.896,0.396 0.458,0.198 10 false v5

a.

Disconnect the v5 rear seat climate control ECU (rear No. 1 RH) connector.


b.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.


Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
v5-3 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
v5-12 (IG) - Body ground B - Body ground Ignition power supply Engine switch on (IG) 11 to 14 V
Engine switch off Below 1 V
v5-13 (+B) - Body ground P - Body ground Battery power supply Always 11 to 14 V


c.

Reconnect the v5 rear seat climate control ECU (rear No. 1 RH) connector.


d.

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

Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
v5-2 (HTR-) - Body ground GR - Body ground Seat heater ground Always Below 1 Ω
v5-7 (HSWM) - Body ground L - Body ground Seat heater switch signal
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 1 RH]) off


11 to 14 V
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 1 RH]) on


Below 1 V
v5-11 (HTR+) - Body ground W - Body ground Seat heater drive signal
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 1 RH]) off


Below 1 V
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 1 RH]) on


11 to 14 V
v5-15 (TMT+) - Body ground SB - Body ground Seat heater sensor input signal - -
v5-16 (TMT-) - Body ground BE - Body ground Seat heater sensor input signal - -


e.

Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
v5-1 (IND1) - Body ground LG - Body ground Seat heater indicator light (LO) signal
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 1 RH]) on (LO)


Pulse generation
v5-24 (HSWI) - Body ground R - Body ground Seat heater indicator light (HI) signal
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 1 RH]) on (HI)


Pulse generation



REAR SEAT CLIMATE CONTROL ECU (REAR NO. 2 LH) (w/ Rear No. 2 Power Seat)


E313799N03
3.333,0.167 3.729,0.396 0.396,0.229 3.417,0.198 3.875,0.396 0.458,0.198 10 false y12

a.

Disconnect the y12 rear seat climate control ECU (rear No. 2 LH) connector.


b.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.


Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
y12-3 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
y12-12 (IG) - Body ground B - Body ground Ignition power supply Engine switch on (IG) 11 to 14 V
Engine switch off Below 1 V
y12-13 (+B) - Body ground P - Body ground Battery power supply Always 11 to 14 V


c.

Reconnect the y12 rear seat climate control ECU (rear No. 2 LH) connector.


d.

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

Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
y12-2 (OTOD) - Body ground GR - Body ground Seat heater ground Always Below 1 Ω
y12-7 (OSRV) - Body ground L - Body ground Seat heater switch signal
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 2 LH]) off


11 to 14 V
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 2 LH]) on


Below 1 V
y12-11 (OTOU) - Body ground W - Body ground Seat heater drive signal
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 2 LH]) off


Below 1 V
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 2 LH]) on


11 to 14 V
y12-15 (RCLU) - Body ground SB - Body ground Seat heater sensor input signal - -
y12-16 (RCLD) - Body ground BE - Body ground Seat heater sensor input signal - -


e.

Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
y12-1 (OSRB) - Body ground LG - Body ground Seat heater indicator light (LO) signal
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 2 LH]) on (LO)


Pulse generation
y12-24 (OSRG) - Body ground R - Body ground Seat heater indicator light (HI) signal
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 2 LH]) on (HI)


Pulse generation



REAR SEAT CLIMATE CONTROL ECU (REAR NO. 2 RH) (w/ Rear No. 2 Power Seat)


E313799N04
3.333,0.167 3.729,0.396 0.396,0.229 3.458,0.198 3.917,0.396 0.458,0.198 10 false y4

a.

Disconnect the y4 rear seat climate control ECU (rear No. 2 RH) connector.


b.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.


Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
y4-3 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
y4-12 (IG) - Body ground B - Body ground Ignition power supply Engine switch on (IG) 11 to 14 V
Engine switch off Below 1 V
y4-13 (+B) - Body ground P - Body ground Battery power supply Always 11 to 14 V


c.

Reconnect the y4 rear seat climate control ECU (rear No. 2 RH) connector.


d.

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

Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
y4-2 (RLCD) - Body ground GR - Body ground Seat heater ground Always Below 1 Ω
y4-7 (OSRV) - Body ground L - Body ground Seat heater switch signal
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 2 RH]) off


11 to 14 V
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 2 RH]) on


Below 1 V
y4-11 (RCLU) - Body ground W - Body ground Seat heater drive signal
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 2 RH]) off


Below 1 V
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 2 RH]) on


11 to 14 V
y4-15 (OTSU) - Body ground SB - Body ground Seat heater sensor input signal - -
y4-16 (OTSD) - Body ground BE - Body ground Seat heater sensor input signal - -


e.

Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
y4-1 (OSRB) - Body ground LG - Body ground Seat heater indicator light (LO) signal
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 2 RH]) on (LO)


Pulse generation
y4-24 (OSRG) - Body ground R - Body ground Seat heater indicator light (HI) signal
·

Engine switch on (IG)

·

Seat heater switch (rear power seat switch [rear No. 2 RH]) on (HI)


Pulse generation