Rear Blower Motor Circuit: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the Techstream main switch on.
3. Select the item below in the Active Test, and then check that the rear blower with fan motor sub-assembly operates.
   ACTIVE TEST / AIR CONDITIONER
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Rear Blower Motor	Rear blower with fan motor sub-assembly	Min.: 0, Max.: 31	-

   Result

   Result	Proceed to
   NG (blower motor does not operate)	A
   NG (blower motor operates but does not change speed)	B
   OK	C

B → See step   6 

C → See step   9 

A: Go to next step 

1. Remove the RR CLR H-fuse from the engine room relay block.
2. Measure the resistance of the H-fuse.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   RR CLR H-fuse	Always	Below 1 Ω

NG → REPLACE FUSE 

OK: Go to next step 

1. Disconnect the N10 motor connector.
   Fig 1: Identifying Rear Blower Motor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect a battery positive (+) lead to terminal 2 and a negative (-) lead to terminal 1, then check that the rear blower motor operates smoothly.

   OK

   The rear blower with fan motor sub-assembly operates smoothly.

3. Measure the current of the connector.

   Standard current

   Tester Connection	Condition	Specified Condition
   N10-1 - N10-2	Rear blower with fan motor sub-assembly operates	Below 13.5 A

NG → See step   8 

OK: Go to next step 

1. Disconnect the N11 rear motor control connector.
   Fig 2: Identifying Harness And Connector (Rear Blower Motor - Rear Blower Motor Control And Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   N10-2 - N11-2 (VIM)	Always	Below 1 Ω
   N10-1 - Body ground	Always	Below 1 Ω
   N10-2 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Install the RR CLR H-fuse.
2. Measure the voltage according to the value(s) in the table below.
   Fig 3: Checking Harness And Connector (Rear Blower Motor Control - Battery And Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard voltage

   Tester Connection	Condition	Specified Condition
   N11-1 (+B) - Body ground	Always	11 to 14 V

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

   Standard resistance

   Tester Connection	Condition	Specified Condition
   N11-6 (GND) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the D38 amplifier connector.
   Fig 4: Identifying Harness And Connector (Air Conditioning Amplifier - Blower Motor Control)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   D38-22 (BLWH) - D11-3 (SI)	Always	Below 1 Ω
   D38-20 (GND2) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the D38 amplifier connector.
2. Remove the air conditioning amplifier with its connectors still connected. Refer to REMOVAL .
   Fig 5: Identifying Air Conditioning Amplifier

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check the waveform of the amplifier connector.

   OK

   Waveform is as shown in the illustration.

   HINT: 

   The waveform varies with the blower level.

   Item	Content
   Tester Connection	D38-22 (BLWH) - D38-20 (GND2)
   Tool Setting	1 V/DIV., 500 μsec./DIV.
   Condition	Ignition switch ON Blower switch LO

NG → See step   10 

OK → See step   11