Blower Motor Circuit [06/2015 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Air Conditioner / Active Test.
5. Perform the Active Test according to the display on the Techstream.

   Body Electrical > Air Conditioner > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Blower Motor	Blower motor with fan sub-assembly	Min.: 0, Max.: 31	-

   Body Electrical > Air Conditioner > Active Test 

   Tester Display
   Blower Motor

   Result

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

Result:  1

A 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [06/2015 - ] 

Result:  3

C 

See step  6

Result:  2

B 

See step  2

1. Disconnect the F20 blower motor with fan sub-assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F20-1 (GND) - Body ground	Always	Below 1 Ω

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Blower Motor with Fan Sub-assembly)

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  1

OK 

See step  3

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   F20-3 (+B) - Body ground	Always	11 to 14 V

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Blower Motor with Fan Sub-assembly)

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  1

OK 

See step  4

1. Disconnect the F28 air conditioning amplifier assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F28-22 (BLW) - F20-2 (SI)	Always	Below 1 Ω
   F28-22 (BLW) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  1

OK 

See step  5

1. Reconnect the F20 blower motor with fan sub-assembly connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   F28-22 (BLW) - Body ground	Always	4.5 to 5.5 V

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Air Conditioning Amplifier Assembly)

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPLACE BLOWER MOTOR WITH FAN SUB-ASSEMBLY. Refer to  REMOVAL [06/2015 - ] 

Result:  1

OK 

See step  6

1. Remove the air conditioning amplifier assembly.

   Refer to REMOVAL [06/2015 - ]

2. Reconnect the air conditioning amplifier assembly connector.
3. Turn the ignition switch to ON.
4. Turn the blower switch on (LO).
5. Measure the waveform between terminal F28-22 (BLW) of the air conditioning amplifier assembly and ground point.

   OK

   Waveform is similar to that shown in the illustration.

   HINT: 

   The waveform varies with the blower speed.

   Item	Content
   Tool Setting	1 V/DIV., 500 μs./DIV.
   Vehicle Condition	Ignition switch ON Blower switch: LO

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Air Conditioning Amplifier Assembly)

   Result

   Proceed to
   OK
   NG

Result:  1

OK 

REPLACE BLOWER MOTOR WITH FAN SUB-ASSEMBLY. Refer to  REMOVAL [06/2015 - ] 

Result:  2

NG 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [06/2015 - ]