RM35X0E _58 Vehicle Interior _079316 HEATING / AIR CONDITIONING _0386654 AIR CONDITIONING SYSTEM(for Heater System) J

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for Heater 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.

·

No heating at all. (Airflow volume control is normal.)

·

Air outlet temperature does not increase. (Airflow volume control is normal.)


Rear blower motor circuit malfunction

WIRING DIAGRAM

E416668E04
2.458,1.26 4.146,1.458 1.688,0.198 10 false HTR RR NO.1 5.135,0.802 6.625,1.031 1.49,0.229 10 false u2 4.063,4.833 6.708,5.094 2.646,0.26 10 false N81 5.167,2.292 5.479,2.49 0.313,0.198 10 false LO 5.729,2.292 6.042,2.49 0.313,0.198 10 false HI 5.448,2.292 5.76,2.49 0.313,0.198 10 false M1 4.938,2.292 5.25,2.49 0.313,0.198 10 false E 4.49,2.563 4.802,2.76 0.313,0.198 10 false OFF 4.063,3.74 4.375,3.938 0.313,0.198 10 false E 4.563,2.833 4.875,3.031 0.313,0.198 10 false LO 4.552,3.083 4.865,3.281 0.313,0.198 10 false M1 4.583,3.354 4.896,3.552 0.313,0.198 10 false HI 4.063,4.5 4.375,4.698 0.313,0.198 10 false HI 4.042,4.24 4.354,4.438 0.313,0.198 10 false M1 2.875,5.302 3.188,5.5 0.313,0.198 10 false HI 2.844,4.25 3.156,4.448 0.313,0.198 10 false M2 1.125,5.292 1.438,5.49 0.313,0.198 10 false M1 1.25,5.688 2.938,5.885 1.688,0.198 10 false u1 1.375,1.083 3.063,1.281 1.688,0.198 10 false A/C-IG1 NO.2 1.354,0.667 3.042,0.865 1.688,0.198 10 false HTR RR NO.1 0.385,0.5 2.073,0.698 1.688,0.198 10 false from Battery 0.302,0.927 1.229,1.292 0.927,0.365 10 false from IG1 NO.1 Relay 4.052,1.802 4.365,2 0.313,0.198 10 false LO 2.292,0.406 3.979,0.604 1.688,0.198 10 false 5 2.313,0.823 4,1.021 1.688,0.198 10 false 2 3.438,0.406 5.125,0.604 1.688,0.198 10 false 3 3.448,0.813 5.135,1.01 1.688,0.198 10 false 1 5.344,0.396 5.667,0.594 0.323,0.198 10 false 1 6.625,0.406 6.948,0.604 0.323,0.198 10 false 2 3.802,1.802 4,2.01 0.198,0.208 10 false 4 5.135,0.979 6.771,1.375 1.635,0.396 10 false Rear Heater Blower Motor Sub-assembly 3.823,3.74 4.135,3.938 0.313,0.198 10 false 1 3.76,4.25 4.073,4.448 0.313,0.198 10 false 10 3.833,4.51 4.146,4.708 0.313,0.198 10 false 8 4.052,5.01 6.698,5.271 2.646,0.26 10 false No. 2 Air Conditioning Control Assembly 0.958,5.292 1.271,5.49 0.313,0.198 10 false 2 3.146,4.24 3.458,4.438 0.313,0.198 10 false 3 3.135,5.292 3.448,5.49 0.313,0.198 10 false 1 1.25,5.854 3.188,6.063 1.938,0.208 10 false Rear Heater Blower Resistor 5.281,1.896 6.531,2.104 1.25,0.208 10 false Rear Blower Switch

CAUTION / NOTICE / HINT

NOTICE:

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


PROCEDURE

1.INSPECT HEATER RELAY (HTR RR NO.1)
a.

Remove the heater relay (HTR RR NO.1) from the No. 1 engine room relay block assembly.


b.

Inspect the heater relay (HTR RR NO.1).

Click hereVehicle Interior>HEATING / AIR CONDITIONING>RELAY>ON-VEHICLE INSPECTION


Result:
Proceed to
OK
NG



OK

2.INSPECT NO. 2 AIR CONDITIONING CONTROL ASSEMBLY

NG

REPLACE HEATER RELAY (HTR RR NO.1)

3.INSPECT REAR HEATER BLOWER RESISTOR
a.

Remove the rear heater blower resistor.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>BLOWER RESISTOR (for Rear Heater)>REMOVAL


b.

Inspect the rear heater blower resistor.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>BLOWER RESISTOR (for Rear Heater)>INSPECTION


Result:
Proceed to
OK
NG



OK

4.INSPECT REAR HEATER BLOWER MOTOR SUB-ASSEMBLY

NG

REPLACE REAR HEATER BLOWER RESISTOR

Click hereVehicle Interior>HEATING / AIR CONDITIONING>BLOWER RESISTOR (for Rear Heater)>REMOVAL


4.INSPECT REAR HEATER BLOWER MOTOR SUB-ASSEMBLY
a.

Remove the blower motor assembly.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>REAR HEATER UNIT>DISASSEMBLY


b.

Inspect the blower motor assembly.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>REAR HEATER UNIT>INSPECTION


Result:
Proceed to
OK
NG



OK

5.CHECK HARNESS AND CONNECTOR (HEATER RELAY (HTR RR NO.1) - BATTERY)

NG

REPLACE REAR HEATER BLOWER MOTOR SUB-ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>REAR HEATER UNIT>DISASSEMBLY


5.CHECK HARNESS AND CONNECTOR (HEATER RELAY (HTR RR NO.1) - BATTERY)
a.
B340809C08
0.115,0.083 0.427,0.281 0.313,0.198 10 false *a
*a Front view of wire harness connector
(to Heater Relay (HTR RR NO.1))


Remove the heater relay (HTR RR NO.1) from the No. 1 engine room relay block assembly.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
Terminal 5 - Body ground Always 11 to 14 V
Terminal 2 - Body ground Ignition switch off Below 1 V
Terminal 2 - Body ground Ignition switch ON 11 to 14 V



Result:
Proceed to
OK
NG



OK

6.CHECK HARNESS AND CONNECTOR (HEATER RELAY (HTR RR NO.1) - REAR HEATER BLOWER MOTOR SUB-ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK HARNESS AND CONNECTOR (HEATER RELAY (HTR RR NO.1) - REAR HEATER BLOWER MOTOR SUB-ASSEMBLY)
a.

Remove the heater relay (HTR RR NO.1) from the No. 1 engine room relay block assembly.


b.

Disconnect the u2 rear heater blower motor sub-assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
Terminal 3 - u2-1 Always Below 1 Ω
Terminal 3 or u2-1 - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

7.CHECK HARNESS AND CONNECTOR (REAR HEATER BLOWER RESISTOR - REAR HEATER BLOWER MOTOR SUB-ASSEMBLY AND BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.CHECK HARNESS AND CONNECTOR (REAR HEATER BLOWER RESISTOR - REAR HEATER BLOWER MOTOR SUB-ASSEMBLY AND BODY GROUND)
a.

Disconnect the u1 rear heater blower resistor connector.


b.

Disconnect the u2 rear heater blower motor sub-assembly connector.


c.

Disconnect the N81 No. 2 air conditioning control assembly connector.


d.

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

Standard Resistance:
Tester Connection Condition Specified Condition
u1-1 (HI) - u2-2 Always Below 1 Ω
u1-2 (M1) - Body ground Always Below 1 Ω
u1-1 (HI) or u2-2 - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

8.CHECK HARNESS AND CONNECTOR (REAR HEATER BLOWER MOTOR SUB-ASSEMBLY - NO. 2 AIR CONDITIONING CONTROL ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.CHECK HARNESS AND CONNECTOR (REAR HEATER BLOWER MOTOR SUB-ASSEMBLY - NO. 2 AIR CONDITIONING CONTROL ASSEMBLY)
a.

Disconnect the u2 rear heater blower motor sub-assembly connector.


b.

Disconnect the N81 No. 2 air conditioning control assembly connector.


c.

Disconnect the u1 rear heater blower resistor connector.


d.

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

Standard Resistance:
Tester Connection Condition Specified Condition
u2-2 - N81-8 (HI) Always Below 1 Ω
u2-2 or N81-8 (HI) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

9.CHECK HARNESS AND CONNECTOR (NO. 2 AIR CONDITIONING CONTROL ASSEMBLY - BLOWER RESISTOR AND BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.CHECK HARNESS AND CONNECTOR (NO. 2 AIR CONDITIONING CONTROL ASSEMBLY - BLOWER RESISTOR AND BODY GROUND)
a.

Disconnect the N81 No. 2 air conditioning control assembly connector.


b.

Disconnect the u1 rear heater blower resistor connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
N81-10 (M2) - u1-3 (M1) Always Below 1 Ω
N81-1 (E) - Body ground Always Below 1 Ω
N81-10 (M1) or u1-3 (M2) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

10.CHECK HARNESS AND CONNECTOR (HEATER RELAY (HTR RR NO.1) - NO. 2 AIR CONDITIONING CONTROL ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.CHECK HARNESS AND CONNECTOR (HEATER RELAY (HTR RR NO.1) - NO. 2 AIR CONDITIONING CONTROL ASSEMBLY)
a.

Remove the heater relay (HTR RR NO.1) from the No. 1 engine room relay block assembly.


b.

Disconnect the N81 No. 2 air conditioning control assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
N81-4 (LO) - Terminal 1 Always Below 1 Ω
N81-4 (LO) or Terminal 1 - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE REAR HEATER ASSEMBLY

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR