RM3090E _58 Vehicle Interior _008789 HEATING / AIR CONDITIONING _0049188 AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System) J

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


DESCRIPTION

The blower with fan motor sub-assembly is operated by signals from the air conditioning amplifier assembly. Blower motor speed signals are transmitted in accordance with changes in the duty ratio.

WIRING DIAGRAM

E269952E01
3.042,1.75 3.5,1.948 0.458,0.198 10 false G54 5.469,2.75 7.073,3.135 1.604,0.385 10 false Air Conditioning Amplifier Assembly 5.74,1.708 6.698,1.896 0.958,0.188 10 false Duty Control 5.615,0.708 6.573,0.896 0.958,0.188 10 false BLW 3.042,1.938 4.5,2.5 1.458,0.563 10 false Blower with Fan Motor Sub-assembly 5.458,2.563 5.917,2.76 0.458,0.198 10 false G81 5.354,0.594 5.563,0.781 0.208,0.188 10 false 22 4.188,0.583 4.396,0.771 0.208,0.188 10 false 2 3.938,0.698 4.146,0.885 0.208,0.188 10 false SI 3.219,0.708 3.427,0.896 0.208,0.188 10 false +B 3.031,0.604 3.177,0.802 0.146,0.198 10 false 3 3.219,1.344 3.604,1.531 0.385,0.188 10 false GND 3.031,1.219 3.177,1.406 0.146,0.188 10 false 1 2.292,0.875 2.781,1.063 0.49,0.188 10 false HTR 0.625,0.708 1.438,0.927 0.813,0.219 10 false from Battery

CAUTION / NOTICE / HINT

NOTICE:
·

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

·

When the battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System)>INITIALIZATION



PROCEDURE

1.PERFORM ACTIVE TEST USING GTS
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.

Check the operation by referring to the table below.

Body Electrical > Air Conditioner > Active Test
Tester Display Measurement Item Control Range Diagnostic Note
Blower Motor Blower with fan motor sub-assembly Min.: 0, Max.: 31 -
Body Electrical > Air Conditioner > Active Test
Tester Display
Blower Motor
50004 121 2

Result:
Result Proceed to
OK A
NG (Blower with fan motor sub-assembly does not operate) B
NG (Blower with fan motor sub-assembly operates but does not change speed) C



A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System)>PROBLEM SYMPTOMS TABLE


B

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

C

6.CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
2.CHECK HARNESS AND CONNECTOR (BLOWER WITH FAN MOTOR SUB-ASSEMBLY - BODY GROUND)
a.
E146411C01
1.479,0.448 1.885,0.698 0.406,0.25 0.854,1.615 1.25,1.615 true 0.042,0.031 0.354,0.229 0.313,0.198 10 *a 1.563,0.49 1.875,0.688 0.313,0.198 10 G54 0.49,1.542 0.865,1.719 0.375,0.177 10 GND
*a Front view of wire harness connector
(to Blower with Fan Motor Sub-assembly)


Disconnect the blower with fan motor sub-assembly connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
G54-1 (GND) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (BLOWER WITH FAN MOTOR SUB-ASSEMBLY - BATTERY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.CHECK HARNESS AND CONNECTOR (BLOWER WITH FAN MOTOR SUB-ASSEMBLY - BATTERY)
a.
E146411C02
1.479,0.448 1.885,0.698 0.406,0.25 2.125,1.615 2.521,1.615 true 0.042,0.031 0.354,0.229 0.313,0.198 10 *a 1.563,0.49 1.875,0.688 0.313,0.198 10 G54 2.583,1.531 2.958,1.708 0.375,0.177 10 +B
*a Front view of wire harness connector
(to Blower with Fan Motor Sub-assembly)


Disconnect the blower with fan motor sub-assembly connector.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
G54-3 (+B) - Body ground Always 11 to 14 V



Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - BLOWER WITH FAN MOTOR SUB-ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - BLOWER WITH FAN MOTOR SUB-ASSEMBLY)
a.

Disconnect the G81 air conditioning amplifier assembly connector.


b.

Disconnect the G54 blower with fan motor sub-assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
G81-22 (BLW) - G54-2 (SI) Always Below 1 Ω
G81-22 (BLW) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

5.CHECK BLOWER WITH FAN MOTOR SUB-ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.CHECK BLOWER WITH FAN MOTOR SUB-ASSEMBLY
a.
E269948C02
1.5,0.313 1.927,0.552 0.427,0.24 2.896,1.813 2.771,1.813 2.771,1.813 2.542,1.427 true 0.042,0.052 0.354,0.25 0.313,0.198 10 *a 1.583,0.354 1.896,0.552 0.313,0.198 10 G81 2.938,1.729 3.313,1.917 0.375,0.188 10 BLW
*a Rear view of wire harness connector
(to Air Conditioning Amplifier Assembly)


Disconnect the air conditioning amplifier assembly connector.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
G81-22 (BLW) - Body ground Always 4.5 to 5.5 V



Result:
Proceed to
OK
NG



OK

6.CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPLACE BLOWER WITH FAN MOTOR SUB-ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>FRONT BLOWER MOTOR>REMOVAL


6.CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
E265341C04
1.385,0.323 1.729,0.552 0.344,0.229 2.281,1.906 2.031,1.115 false 1.427,0.354 1.76,0.552 0.333,0.198 10 false G81 0.24,0.167 0.573,0.365 0.333,0.198 10 false *a 2.219,1.938 2.646,2.188 0.427,0.25 10 false BLW 2.802,2.448 3.396,2.677 0.594,0.229 10 false 1 V/DIV. 3,3.896 3.427,4.146 0.427,0.25 10 false GND 1.354,4.302 2.302,4.563 0.948,0.26 10 false 500 μs./DIV.
*a Component with harness connected
(Air Conditioning Amplifier Assembly)


a.

Remove the air conditioning amplifier assembly with its connectors still connected.

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


b.

Turn the ignition switch to ON.


c.

Turn the blower switch LO.


d.

Measure the waveform of the air conditioning amplifier assembly connector.

OK:

Waveform is similar to that shown in the illustration.


HINT:

The waveform varies with the blower speed.


Item Content
Tester Connection G81-22 (BLW) - Body ground
Tool setting 1 V/DIV., 500 μs/DIV.
Vehicle condition Ignition switch ON
Blower switch LO


Result:
Proceed to
OK
NG



OK

REPLACE BLOWER WITH FAN MOTOR SUB-ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>FRONT BLOWER MOTOR>REMOVAL


NG

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

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