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) Blower Motor Circuit

DESCRIPTION

The blower with fan motor sub-assembly reads the signal from the air conditioning amplifier assembly 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.	Blower motor circuit malfunction

WIRING DIAGRAM

for LHD:

5.583,3.958 7.146,4.344 1.563,0.385 10 false Air Conditioning Amplifier Assembly 0.729,4.76 3.302,4.979 2.573,0.219 10 false Blower Resistor 3.656,0.635 4.271,0.833 0.615,0.198 10 false E 5.958,0.323 6.573,0.521 0.615,0.198 10 false SW 1 3.24,0.906 3.854,1.104 0.615,0.198 10 false OFF 2.927,3.865 5.292,4.083 2.365,0.219 10 false No. 2 Heater Control Sub-assembly 3.885,0.635 4.5,0.833 0.615,0.198 10 false LO 4.146,0.635 4.76,0.833 0.615,0.198 10 false M1 4.417,0.635 5.031,0.833 0.615,0.198 10 false M2 4.708,0.635 5.323,0.833 0.615,0.198 10 false HI 3.271,1.167 3.885,1.365 0.615,0.198 10 false LO 3.292,1.438 3.906,1.635 0.615,0.198 10 false M1 3.292,1.698 3.906,1.896 0.615,0.198 10 false M2 3.323,1.958 3.938,2.156 0.615,0.198 10 false HI 2.073,4.177 2.688,4.375 0.615,0.198 10 false HI 1.99,3.135 2.604,3.333 0.615,0.198 10 false M2 2,2.865 2.615,3.063 0.615,0.198 10 false M1 0.198,4.177 0.813,4.375 0.615,0.198 10 false 4 4.948,0.24 5.563,0.438 0.615,0.198 10 false LO 2.802,2.208 3.417,2.406 0.615,0.198 10 false E 2.802,2.865 3.417,3.063 0.615,0.198 10 false M1 2.813,3.125 3.427,3.323 0.615,0.198 10 false M2 2.823,3.385 3.438,3.583 0.615,0.198 10 false HI 3.51,5.052 4.906,5.406 1.396,0.354 10 false Blower with Fan Motor Sub-assembly 4.063,6.927 5.677,7.156 1.615,0.229 10 false FR HTR 0.396,4.177 1.01,4.375 0.615,0.198 10 false E 2.333,4.177 2.948,4.375 0.615,0.198 10 false 1 2.323,2.865 2.938,3.063 0.615,0.198 10 false 2 2.323,3.125 2.938,3.323 0.615,0.198 10 false 3 5.594,3.792 6.208,3.99 0.615,0.198 10 false N40 5.75,0.24 6.365,0.438 0.615,0.198 10 false 4 2.938,3.719 5.656,3.969 2.719,0.25 10 false N75 0.729,4.615 3.448,4.865 2.719,0.25 10 false N72 3.51,4.885 5.635,5.073 2.125,0.188 10 false N70 2.542,2.208 3.156,2.406 0.615,0.198 10 false 1 2.552,3.125 3.167,3.323 0.615,0.198 10 false 4 5.313,0.24 5.927,0.438 0.615,0.198 10 false 5 2.552,3.396 3.167,3.594 0.615,0.198 10 false 7 2.552,2.865 3.167,3.063 0.615,0.198 10 false 8 3.552,4.469 4.167,4.667 0.615,0.198 10 false 1 4.865,4.469 5.479,4.667 0.615,0.198 10 false 2 4.813,5.938 5.427,6.135 0.615,0.198 10 false 3 4.833,6.479 5.448,6.677 0.615,0.198 10 false 2 3.677,5.813 4.292,6.01 0.615,0.198 10 false 4 3.677,6.063 4.292,6.26 0.615,0.198 10 false 5 3.656,6.469 4.271,6.667 0.615,0.198 10 false 1 0.604,6.573 2.25,6.771 1.646,0.198 10 false from IG1 NO.3 Relay 1.052,6.135 2.698,6.333 1.646,0.198 10 false from Battery 2.427,6.333 4.073,6.531 1.646,0.198 10 false HTR FR 2.917,0.26 3.906,0.479 0.99,0.219 10 false Blower Switch

for RHD:

5.583,3.958 7.146,4.344 1.563,0.385 10 false Air Conditioning Amplifier Assembly 0.729,4.75 3.302,4.969 2.573,0.219 10 false Blower Resistor 3.656,0.635 4.271,0.833 0.615,0.198 10 false E 5.969,0.313 6.583,0.51 0.615,0.198 10 false SW 1 3.24,0.906 3.854,1.104 0.615,0.198 10 false OFF 2.927,3.854 5.292,4.073 2.365,0.219 10 false No. 2 Heater Control Sub-assembly 3.885,0.635 4.5,0.833 0.615,0.198 10 false LO 4.146,0.635 4.76,0.833 0.615,0.198 10 false M1 4.417,0.635 5.031,0.833 0.615,0.198 10 false M2 4.708,0.635 5.323,0.833 0.615,0.198 10 false HI 3.271,1.167 3.885,1.365 0.615,0.198 10 false LO 3.292,1.438 3.906,1.635 0.615,0.198 10 false M1 3.292,1.698 3.906,1.896 0.615,0.198 10 false M2 3.323,1.958 3.938,2.156 0.615,0.198 10 false HI 2.063,4.177 2.677,4.375 0.615,0.198 10 false HI 2.021,3.125 2.635,3.323 0.615,0.198 10 false M2 2.01,2.854 2.625,3.052 0.615,0.198 10 false M1 0.198,4.177 0.813,4.375 0.615,0.198 10 false 1 5,0.24 5.615,0.438 0.615,0.198 10 false LO 2.802,2.208 3.417,2.406 0.615,0.198 10 false E 2.802,2.865 3.417,3.063 0.615,0.198 10 false M1 2.813,3.135 3.427,3.333 0.615,0.198 10 false M2 2.833,3.385 3.448,3.583 0.615,0.198 10 false HI 3.51,5.052 4.906,5.406 1.396,0.354 10 false Blower with Fan Motor Sub-assembly 4.073,6.927 5.688,7.156 1.615,0.229 10 false FR HTR 0.396,4.177 1.01,4.375 0.615,0.198 10 false E 2.333,4.177 2.948,4.375 0.615,0.198 10 false 4 2.313,2.854 2.927,3.052 0.615,0.198 10 false 3 2.313,3.125 2.927,3.323 0.615,0.198 10 false 2 5.594,3.792 6.208,3.99 0.615,0.198 10 false N40 5.74,0.24 6.354,0.438 0.615,0.198 10 false 4 2.938,3.698 5.656,3.948 2.719,0.25 10 false N75 0.729,4.583 3.448,4.833 2.719,0.25 10 false N72 3.51,4.885 5.635,5.073 2.125,0.188 10 false N70 2.542,2.208 3.156,2.406 0.615,0.198 10 false 1 2.552,3.135 3.167,3.333 0.615,0.198 10 false 4 5.313,0.229 5.927,0.427 0.615,0.198 10 false 5 2.552,3.385 3.167,3.583 0.615,0.198 10 false 7 2.552,2.865 3.167,3.063 0.615,0.198 10 false 8 3.552,4.469 4.167,4.667 0.615,0.198 10 false 1 4.865,4.469 5.479,4.667 0.615,0.198 10 false 2 4.813,5.938 5.427,6.135 0.615,0.198 10 false 3 4.833,6.479 5.448,6.677 0.615,0.198 10 false 2 3.677,5.813 4.292,6.01 0.615,0.198 10 false 4 3.677,6.063 4.292,6.26 0.615,0.198 10 false 5 3.656,6.469 4.271,6.667 0.615,0.198 10 false 1 0.604,6.573 2.25,6.771 1.646,0.198 10 false from IG1 NO.3 Relay 1.052,6.135 2.698,6.333 1.646,0.198 10 false from Battery 2.427,6.333 4.073,6.531 1.646,0.198 10 false HTR FR 2.979,0.292 3.979,0.5 1,0.208 10 false 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 (FR HTR)

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

Inspect the heater relay (FR HTR).

Click hereVehicle Interior>HEATING / AIR CONDITIONING>RELAY>ON-VEHICLE INSPECTION201902,201906,_58,_079316,_0384901,RM100000001GIVT,201906,999999,_58,_079316,_0384901,RM100000001J16C,

Result:

Proceed to
OK
NG

2.INSPECT NO. 2 HEATER CONTROL SUB-ASSEMBLY

REPLACE HEATER RELAY (FR HTR)

2.INSPECT NO. 2 HEATER CONTROL SUB-ASSEMBLY

Remove the No. 2 heater control sub-assembly.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING PANEL (for Front)>REMOVAL201902,201906,_58,_079316,_0384897,RM100000001GIVG,201906,999999,_58,_079316,_0384897,RM100000001ISJP,

Inspect the No. 2 heater control sub-assembly.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING PANEL (for Front)>INSPECTION201902,999999,_58,_079316,_0384897,RM100000001GYVH,

Result:

Proceed to
OK
NG

3.INSPECT BLOWER RESISTOR

REPLACE NO. 2 HEATER CONTROL SUB-ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING PANEL (for Front)>REMOVAL201902,201906,_58,_079316,_0384897,RM100000001GIVG,201906,999999,_58,_079316,_0384897,RM100000001ISJP,

3.INSPECT BLOWER RESISTOR

Remove the blower resistor.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>BLOWER RESISTOR (for Rear Heater)>REMOVAL201902,999999,_58,_079316,_0389894,RM100000001HBYA,

Inspect the blower resistor.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>BLOWER RESISTOR (for Rear Heater)>INSPECTION201902,999999,_58,_079316,_0389894,RM100000001HBYF,

Result:

Proceed to
OK
NG

4.INSPECT BLOWER WITH FAN MOTOR SUB-ASSEMBLY

REPLACE BLOWER RESISTOR

Click hereVehicle Interior>HEATING / AIR CONDITIONING>BLOWER RESISTOR (for Rear Heater)>REMOVAL201902,999999,_58,_079316,_0389894,RM100000001HBYA,

4.INSPECT BLOWER WITH FAN MOTOR SUB-ASSEMBLY

Remove the blower with fan motor sub-assembly.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>FRONT BLOWER MOTOR>REMOVAL201902,201906,_58,_079316,_0384879,RM100000001GITB,201906,999999,_58,_079316,_0384879,RM100000001IHWR,

Inspect the blower with fan motor sub-assembly.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>FRONT BLOWER MOTOR>INSPECTION201902,999999,_58,_079316,_0384879,RM100000001HDSZ,

Result:

Proceed to
OK
NG

5.CHECK HARNESS AND CONNECTOR (HEATER RELAY (FR HTR) - BATTERY AND BODY GROUND)

REPLACE BLOWER WITH FAN MOTOR SUB-ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>FRONT BLOWER MOTOR>REMOVAL201902,201906,_58,_079316,_0384879,RM100000001GITB,201906,999999,_58,_079316,_0384879,RM100000001IHWR,

5.CHECK HARNESS AND CONNECTOR (HEATER RELAY (FR HTR) - BATTERY AND BODY GROUND)

0.083,0.083 0.396,0.281 0.313,0.198 10 false *a

*a	Front view of wire harness connector (to Heater Relay (FR HTR))

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

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 1 - Body ground	Ignition switch off	Below 1 V
Terminal 1 - Body ground	Ignition switch ON	11 to 14 V

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Terminal 4 - Body ground	Always	Below 1 Ω

Result:

Proceed to
OK
NG

6.CHECK HARNESS AND CONNECTOR (HEATER RELAY (FR HTR) - BLOWER WITH FAN MOTOR SUB-ASSEMBLY)

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK HARNESS AND CONNECTOR (HEATER RELAY (FR HTR) - BLOWER WITH FAN MOTOR SUB-ASSEMBLY)

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

Disconnect the N70 blower with fan motor sub-assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Terminal 3 - N70-2	Always	Below 1 Ω
Terminal 3 or N70-2 - Other terminals and body ground	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

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

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

Disconnect the N72 blower resistor connector.

Disconnect the N70 blower with fan motor sub-assembly connector.

Disconnect the N75 No. 2 heater control sub-assembly connector.

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

Standard Resistance:

for LHD:

Tester Connection	Condition	Specified Condition
N72-1 (HI) - N70-1	Always	Below 1 Ω
N72-4 (E) - Body ground	Always	Below 1 Ω
N72-1 (HI) or N70-1 - Other terminals and body ground	Always	10 kΩ or higher

for RHD:

Tester Connection	Condition	Specified Condition
N72-4 (HI) - N70-1	Always	Below 1 Ω
N72-1 (E) - Body ground	Always	Below 1 Ω
N72-4 (HI) or N70-1 - Other terminals and body ground	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

8.CHECK HARNESS AND CONNECTOR (BLOWER WITH FAN MOTOR SUB-ASSEMBLY - NO. 2 HEATER CONTROL SUB-ASSEMBLY)

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.CHECK HARNESS AND CONNECTOR (BLOWER WITH FAN MOTOR SUB-ASSEMBLY - NO. 2 HEATER CONTROL SUB-ASSEMBLY)

Disconnect the N70 blower with fan motor sub-assembly connector.

Disconnect the N75 No. 2 heater control sub-assembly connector.

Disconnect the N72 blower resistor connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
N70-1 - N75-7 (HI)	Always	Below 1 Ω
N70-1 or N75-7 (HI) - Other terminals and body ground	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

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

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

Disconnect the N75 No. 2 heater control sub-assembly connector.

Disconnect the N72 blower resistor connector.

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

Standard Resistance:

for LHD:

Tester Connection	Condition	Specified Condition
N75-4 (M2) - N72-3 (M2)	Always	Below 1 Ω
N75-8 (M1) - N72-2 (M1)	Always	Below 1 Ω
N75-1 (E) - Body ground	Always	Below 1 Ω
N75-4 (M2) or N72-3 (M2) - Other terminals and body ground	Always	10 kΩ or higher
N75-8 (M1) or N72-2 (M1) - Other terminals and body ground	Always	10 kΩ or higher

for RHD:

Tester Connection	Condition	Specified Condition
N75-4 (M2) - N72-2 (M2)	Always	Below 1 Ω
N75-8 (M1) - N72-3 (M1)	Always	Below 1 Ω
N75-1 (E) - Body ground	Always	Below 1 Ω
N75-4 (M2) or N72-2 (M2) - Other terminals and body ground	Always	10 kΩ or higher
N75-8 (M1) or N72-3 (M1) - Other terminals and body ground	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

10.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - HEATER RELAY (FR HTR) AND NO. 2 HEATER CONTROL SUB-ASSEMBLY)

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - HEATER RELAY (FR HTR) AND NO. 2 HEATER CONTROL SUB-ASSEMBLY)

Disconnect the N40 air conditioning amplifier assembly connector.

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

Disconnect the N75 No. 2 heater control sub-assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
N40-4 (SW 1) - N75-5 (LO)	Always	Below 1 Ω
N40-4 (SW 1) - Terminal 2	Always	Below 1 Ω
N40-4 (SW 1) or N75-5 (LO) - Other terminals and 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>REMOVAL201902,201906,_58,_079316,_0384899,RM100000001GIVN,201906,202310,_58,_079316,_0384899,RM100000001ISKD,202310,999999,_58,_079316,_0384899,RM100000002EPUA,

REPAIR OR REPLACE HARNESS OR CONNECTOR