RM38N0EC _58 Vehicle Interior _111839 SEAT _0505696 SEAT HEATER SYSTEM U

SEAT  SEAT HEATER SYSTEM  TERMINALS OF ECU  


CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


E444901N05
0.688,0.5 1.104,0.76 0.417,0.26 2.146,0.49 2.563,0.75 0.417,0.26 3.667,0.479 4.083,0.74 0.417,0.26 5.115,0.469 5.531,0.729 0.417,0.26 6.313,0.469 6.729,0.729 0.417,0.26 6.448,0.542 6.76,0.74 0.313,0.198 10 false z1 5.219,0.552 5.677,0.75 0.458,0.198 10 false E44 3.76,0.552 4.219,0.75 0.458,0.198 10 false E45 2.25,0.563 2.708,0.76 0.458,0.198 10 false E46 0.781,0.573 1.24,0.771 0.458,0.198 10 false E47

a.

Disconnect the E44 air conditioning amplifier assembly 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) Terminal Description Condition Specified Condition
E44-6 (IG+) - E44-17 (GND) IG power supply Ignition switch off Below 1 V
E44-6 (IG+) - E44-17 (GND) IG power supply Ignition switch ON 11 to 14 V
E44-5 (B) - E44-17 (GND) Auxiliary battery power supply Ignition switch off*1
Always*2 		11 to 14 V
E44-17 (GND) - Body ground Ground Always Below 1 Ω

*1: for HV Model

*2: for Gasoline Model



c.

Reconnect the E44 air conditioning amplifier assembly connector.


d.

Measure the voltage and check for pulses generation according to the value(s) in the table below.

Terminal No. (Symbol) Terminal Description Condition Specified Condition
E46-12 (SM1R) - E44-17 (GND) Front seat heater control signal
·

Ignition switch ON

·

Front seat heater switch (refreshing seat switch) (for RH) on (LO)

(heater position)


Below 1 V
E46-13 (SM1L) - E44-17 (GND) Front seat heater control signal
·

Ignition switch ON

·

Front seat heater switch (refreshing seat switch) (for LH) on (LO)

(heater position)


Below 1 V
E44-7 (LIN1) - Body ground Seat heater switch signal Ignition switch ON Pulse generation



CHECK FRONT SEAT HEATER SWITCH (REFRESHING SEAT SWITCH)


B520623N17
3.51,0.188 3.938,0.427 0.427,0.24 3.646,0.229 4.094,0.542 0.448,0.313 10 false L9

a.

Disconnect the L9 front seat heater switch (refreshing seat switch) 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) Terminal Description Condition Specified Condition
L9-9 (IG) - L9-7 (E) IG power supply Ignition switch off Below 1 V
L9-9 (IG) - L9-7 (E) IG power supply Ignition switch ON 11 to 14 V
L9-7 (E) - Body ground Ground Always Below 1 Ω


c.

Reconnect the L9 front seat heater switch (refreshing seat switch) connector.


d.

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

Terminal No. (Symbol) Terminal Description Condition Specified Condition
L9-8 (SLIN) - L9-7 (E) Front seat heater switch signal Ignition switch ON Pulse generation