RM35X0E _58 Vehicle Interior _079316 HEATING / AIR CONDITIONING _0386651 AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System) J

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System)  Rear Blower Motor Circuit  


DESCRIPTION

The blower motor assembly reads the signal and controls operation and speed changes of the blower motor.

If the blower air volume is weak, or there are any other blower malfunctions such as the temperature or air volume cannot be changed, the following causes are possible.

Malfunction Status Factor
·

Blower does not operate at all. (No air comes out.)

·

Blower airflow volume cannot be changed.

·

Blower airflow volume is continuously weak.

·

Blower airflow volume is sometimes weak.

·

Cooling is poor. (w/ Integration Control Panel (for Rear Automatic Cooler))

·

Takes time to cool down. (w/ Integration Control Panel (for Rear Automatic Cooler))


Rear blower motor circuit

WIRING DIAGRAM

for Rear Automatic Cooler:
E414364E02
5.979,2.917 6.896,3.115 0.917,0.198 10 false BLWH 0.417,0.719 1.208,0.927 0.792,0.208 10 false Z11 2.063,0.292 2.979,0.49 0.917,0.198 10 false B 2.698,0.563 3.927,0.76 1.229,0.198 10 false RR BLW MTR LH 5.5,3.5 6.031,3.677 0.531,0.177 10 false N44 2.708,1.563 4.042,1.781 1.333,0.219 10 false RR BLW MTR RH 0.469,2.365 1.427,2.75 0.958,0.385 10 false from Battery 1.719,2.531 2.885,2.75 1.167,0.219 10 false CLR RR 1.323,0.302 2.24,0.5 0.917,0.198 10 false L 1.323,1.281 2.24,1.479 0.917,0.198 10 false L 2.073,1.281 2.99,1.479 0.917,0.198 10 false B 2.427,3.25 3.906,3.458 1.479,0.208 10 false Z15 2.635,2.375 3.802,2.594 1.167,0.219 10 false +B 2.646,2.927 3.813,3.146 1.167,0.219 10 false GND 3.229,2.375 4.396,2.594 1.167,0.219 10 false VM 3.333,2.927 4.5,3.146 1.167,0.219 10 false SI 0.417,0.885 3.396,1.104 2.979,0.219 10 false Rear Blower with Fan Motor Sub-assembly LH 0.51,1.875 3.479,2.125 2.969,0.25 10 false Rear Blower with Fan Motor Sub-assembly RH 2.438,3.427 3.917,3.635 1.479,0.208 10 false Blower Motor Control 0.521,1.719 1.313,1.927 0.792,0.208 10 false Z12 2.406,2.24 3.573,2.458 1.167,0.219 10 false 1 3.583,2.24 4.75,2.458 1.167,0.219 10 false 2 3.594,2.792 4.76,3.01 1.167,0.219 10 false 3 2.417,2.781 3.583,3 1.167,0.219 10 false 6 2.313,0.271 3.479,0.49 1.167,0.219 10 false 2 1.104,0.281 2.271,0.5 1.167,0.219 10 false 1 2.313,1.26 3.479,1.479 1.167,0.219 10 false 2 1.104,1.26 2.271,1.479 1.167,0.219 10 false 1 5.49,3.677 7.073,4.104 1.583,0.427 10 false Air Conditioning Amplifier Assembly 5.646,2.781 5.948,3.01 0.302,0.229 10 false 10

for Rear Automatic Air Conditioning:
E418841E01
5.979,2.104 6.896,2.302 0.917,0.198 10 false BLWH 5.5,3.5 6.031,3.677 0.531,0.177 10 false N44 1.167,1.438 2.125,1.823 0.958,0.385 10 false from Battery 2.438,1.594 3.604,1.813 1.167,0.219 10 false CLR RR 3.135,3.24 4.615,3.448 1.479,0.208 10 false u4 3.354,1.427 4.521,1.646 1.167,0.219 10 false +B 3.375,2.792 4.542,3.01 1.167,0.219 10 false GND 3.354,2.094 4.521,2.313 1.167,0.219 10 false VM 4.021,2.115 5.188,2.333 1.167,0.219 10 false SI 1.104,2.594 2.875,2.938 1.771,0.344 10 false Rear Blower with Fan Motor Sub-assembly 3.125,3.427 4.604,3.635 1.479,0.208 10 false Blower Motor Control 1.104,2.417 1.896,2.625 0.792,0.208 10 false u3 3.135,1.302 4.302,1.521 1.167,0.219 10 false 1 3.125,1.969 4.292,2.188 1.167,0.219 10 false 2 4.365,2.01 5.531,2.229 1.167,0.219 10 false 3 3.115,2.677 4.281,2.896 1.167,0.219 10 false 6 2.688,1.958 3.854,2.177 1.167,0.219 10 false 2 1.469,1.958 2.635,2.177 1.167,0.219 10 false 1 5.49,3.677 7.073,4.104 1.583,0.427 10 false Air Conditioning Amplifier Assembly 5.646,1.99 5.948,2.219 0.302,0.229 10 false 10

CAUTION / NOTICE / HINT

NOTICE:

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


PROCEDURE

1.CHECK VEHICLE TYPE
Result:
Result Proceed to
for Rear Automatic Cooler A
for Rear Automatic Air Conditioning B



A

2.PERFORM ACTIVE TEST USING GTS (REAR BLOWER MOTOR)

B

8.PERFORM ACTIVE TEST USING GTS (REAR BLOWER MOTOR)
2.PERFORM ACTIVE TEST USING GTS (REAR BLOWER MOTOR)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Air Conditioner / Active Test.


e.

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
Rear Blower Motor Rear blower with fan motor sub-assembly Min.: 0
Max.: 31 		-
Body Electrical > Air Conditioner > Active Test
Tester Display
Rear Blower Motor
50004 121 35

Result:
Result Proceed to
Rear blower with fan motor sub-assembly does not operate A
Rear blower with fan motor sub-assembly operates but does not change speed B



A

3.CHECK HARNESS AND CONNECTOR (BLOWER MOTOR CONTROL - BATTERY AND BODY GROUND)

B

7.CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
3.CHECK HARNESS AND CONNECTOR (BLOWER MOTOR CONTROL - BATTERY AND BODY GROUND)
a.
E293155C10
1.448,0.167 1.969,0.417 0.521,0.25 2.583,1.833 2.333,1.833 2.333,1.833 2.083,1.583 true 0.75,0.917 1,0.917 1,0.917 1.344,1.24 true 1.594,0.219 2.052,0.417 0.458,0.198 10 false Z15 0.073,0.073 0.531,0.271 0.458,0.198 10 false *a 0.542,0.833 1,1.031 0.458,0.198 10 false +B 2.625,1.74 3.083,1.938 0.458,0.198 10 false GND
*a Front view of wire harness connector
(to Blower Motor Control)


Disconnect the blower motor control connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
Z15-6 (GND) - Body ground Always Below 1 Ω



c.

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

Standard Voltage:
Tester Connection Condition Specified Condition
Z15-1 (+B) - Body ground Always 11 to 14 V



Result:
Proceed to
OK
NG



OK

4.INSPECT REAR BLOWER WITH FAN MOTOR SUB-ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.INSPECT REAR BLOWER WITH FAN MOTOR SUB-ASSEMBLY
a.

Remove the rear blower with fan motor sub-assembly.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>REAR BLOWER MOTOR (for Rear Cooler)>REMOVAL


b.

Inspect the rear blower with fan motor sub-assembly.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>REAR BLOWER MOTOR (for Rear Cooler)>INSPECTION


Result:
Proceed to
OK
NG



OK

5.CHECK HARNESS AND CONNECTOR (REAR BLOWER WITH FAN MOTOR SUB-ASSEMBLY - BLOWER MOTOR CONTROL AND BODY GROUND)

NG

REPLACE REAR BLOWER WITH FAN MOTOR SUB-ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>REAR BLOWER MOTOR (for Rear Cooler)>REMOVAL


5.CHECK HARNESS AND CONNECTOR (REAR BLOWER WITH FAN MOTOR SUB-ASSEMBLY - BLOWER MOTOR CONTROL AND BODY GROUND)
a.

Disconnect the Z11 rear blower with fan motor sub-assembly LH connector.


b.

Disconnect the Z12 rear blower with fan motor sub-assembly RH connector.


c.

Disconnect the Z15 blower motor control connector.


d.

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

Standard Resistance:
for LH:
Tester Connection Condition Specified Condition
Z11-2 (B) - Z15-2 (VM) Always Below 1 Ω
Z11-1 (L) - Body ground Always Below 1 Ω
Z11-2 (B) or Z15-2 (VM) - Other terminals and body ground Always 10 kΩ or higher

for RH:
Tester Connection Condition Specified Condition
Z12-2 (B) - Z15-2 (VM) Always Below 1 Ω
Z12-1 (L) - Body ground Always Below 1 Ω
Z12-2 (B) or Z15-2 (VM) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

6.CHECK HARNESS AND CONNECTOR (BLOWER MOTOR CONTROL - AIR CONDITIONING AMPLIFIER ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK HARNESS AND CONNECTOR (BLOWER MOTOR CONTROL - AIR CONDITIONING AMPLIFIER ASSEMBLY)
a.

Disconnect the Z15 blower motor control connector.


b.

Disconnect the N44 air conditioning amplifier assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
Z15-3 (SI) - N44-10 (BLWH) Always Below 1 Ω
Z15-3 (SI) or N44-10 (BLWH) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

7.CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
a.
E418806C01
0.49,0.604 1.021,0.896 0.531,0.292 2.333,1.333 2.083,1.333 2.083,1.333 1.958,1.063 true 0.063,0.083 0.375,0.281 0.313,0.198 10 false *a 2.375,1.26 2.688,1.458 0.313,0.198 10 false SI 2.875,2.823 3.323,3.063 0.448,0.24 10 false GND 0.635,0.667 0.948,0.865 0.313,0.198 10 false Z15
*a Component with harness connected
(Blower Motor Control)


Using an oscilloscope, check the waveform.

Item Content
Terminal No. (Symbol) Z15-3 (SI) - Body ground
Tool Setting 1 V/DIV., 500 μs./DIV.
Condition
·

Ignition switch ON

·

Blower switch: LO



OK:

Waveform is as shown in the illustration.


HINT:

Waveform varies with the blower level.



Result:
Proceed to
OK
NG



OK

REPLACE BLOWER MOTOR CONTROL

Click hereVehicle Interior>HEATING / AIR CONDITIONING>BLOWER MOTOR CONTROLLER (for Rear Cooler)>REMOVAL


NG

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING AMPLIFIER>REMOVAL


8.PERFORM ACTIVE TEST USING GTS (REAR BLOWER MOTOR)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Air Conditioner / Active Test.


e.

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
Rear Blower Motor Rear blower with fan motor sub-assembly Min.: 0
Max.: 31 		-
Body Electrical > Air Conditioner > Active Test
Tester Display
Rear Blower Motor
50004 121 35

Result:
Result Proceed to
Rear blower with fan motor sub-assembly does not operate A
Rear blower with fan motor sub-assembly operates but does not change speed B



A

9.CHECK HARNESS AND CONNECTOR (BLOWER MOTOR CONTROL - BATTERY AND BODY GROUND)

B

13.CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
9.CHECK HARNESS AND CONNECTOR (BLOWER MOTOR CONTROL - BATTERY AND BODY GROUND)
a.
E293155C11
1.448,0.167 1.969,0.417 0.521,0.25 2.583,1.833 2.333,1.833 2.333,1.833 2.083,1.583 true 0.75,0.917 1,0.917 1,0.917 1.344,1.24 true 1.646,0.219 2.104,0.417 0.458,0.198 10 false u4 0.073,0.073 0.531,0.271 0.458,0.198 10 false *a 0.542,0.833 1,1.031 0.458,0.198 10 false +B 2.625,1.74 3.083,1.938 0.458,0.198 10 false GND
*a Front view of wire harness connector
(to Blower Motor Control)


Disconnect the blower motor control connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
u4-6 (GND) - Body ground Always Below 1 Ω



c.

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

Standard Voltage:
Tester Connection Condition Specified Condition
u4-1 (+B) - Body ground Always 11 to 14 V



Result:
Proceed to
OK
NG



OK

10.INSPECT REAR BLOWER WITH FAN MOTOR SUB-ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.INSPECT REAR BLOWER WITH FAN MOTOR SUB-ASSEMBLY
a.

Remove the rear blower with fan motor sub-assembly.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>REAR BLOWER MOTOR (for Rear Air Conditioning System)>REMOVAL


b.

Inspect the rear blower with fan motor sub-assembly.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>REAR BLOWER MOTOR (for Rear Air Conditioning System)>INSPECTION


Result:
Proceed to
OK
NG



OK

11.CHECK HARNESS AND CONNECTOR (REAR BLOWER WITH FAN MOTOR SUB-ASSEMBLY - BLOWER MOTOR CONTROL AND BODY GROUND)

NG

REPLACE REAR BLOWER WITH FAN MOTOR SUB-ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>REAR BLOWER MOTOR (for Rear Air Conditioning System)>REMOVAL


11.CHECK HARNESS AND CONNECTOR (REAR BLOWER WITH FAN MOTOR SUB-ASSEMBLY - BLOWER MOTOR CONTROL AND BODY GROUND)
a.

Disconnect the u3 rear blower with fan motor sub-assembly connector.


b.

Disconnect the u4 blower motor control connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
u3-2 - u4-2 (VM) Always Below 1 Ω
u3-1 - Body ground Always Below 1 Ω
u3-2 or u4-2 (VM) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

12.CHECK HARNESS AND CONNECTOR (BLOWER MOTOR CONTROL - AIR CONDITIONING AMPLIFIER ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

12.CHECK HARNESS AND CONNECTOR (BLOWER MOTOR CONTROL - AIR CONDITIONING AMPLIFIER ASSEMBLY)
a.

Disconnect the u4 blower motor control connector.


b.

Disconnect the N44 air conditioning amplifier assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
u4-3 (SI) - N44-10 (BLWH) Always Below 1 Ω
u4-3 (SI) or N44-10 (BLWH) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

13.CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

13.CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
a.
E418806C02
0.49,0.604 1.021,0.896 0.531,0.292 2.333,1.333 2.083,1.333 2.083,1.333 1.958,1.063 true 0.063,0.083 0.375,0.281 0.313,0.198 10 false *a 2.375,1.26 2.688,1.458 0.313,0.198 10 false SI 2.875,2.667 3.323,2.906 0.448,0.24 10 false GND 0.677,0.667 0.99,0.865 0.313,0.198 10 false u4
*a Component with harness connected
(Blower Motor Control)


Using an oscilloscope, check the waveform.

Item Content
Terminal No. (Symbol) u4-3 (SI) - Body ground
Tool Setting 1 V/DIV., 500 μs./DIV.
Condition
·

Ignition switch ON

·

Blower switch: LO



OK:

Waveform is as shown in the illustration.


HINT:

Waveform varies with the blower level.



Result:
Proceed to
OK
NG



OK

REPLACE BLOWER MOTOR CONTROL

Click hereVehicle Interior>HEATING / AIR CONDITIONING>BLOWER MOTOR CONTROLLER (for Rear Air Conditioning System)>REMOVAL


NG

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING AMPLIFIER>REMOVAL