Rear Blower Motor Circuit: Procedure

1. Connect Techstream to the DLC3.
2. Turn the ignition switch on (IG) and turn Techstream main switch on.
3. Select the item below in the Active Test, and then check that the rear blower motor operates.
   ACTIVE TEST / AIR CONDITIONER
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Rear Blower Motor	Rear blower motor	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 fuse from the main body ECU.
2. Measure the resistance of the RR CLR fuse.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   RR CLR 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 Terminals

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

   OK

   The rear blower motor operates smoothly.

3. Measure the current of the connector.

   Standard current

   Tester Connection	Condition	Specified Condition
   N10-1 - N10-2	Rear blower motor operates	Below 13.5 A

NG → See step   8 

OK: Go to next step 

1. Disconnect the N11 rear motor control connector.
   Fig 2: Checking Harness And Connector (Rear Blower Motor Control - 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
   N11-6 (GND) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the N11 rear motor control connector.
   Fig 3: Checking Harness And Connector (Rear Blower Motor Control - Battery)

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

   Standard voltage

   Tester Connection	Condition	Specified Condition
   N11-1 (+B) - Body ground	Ignition switch on (IG)	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the D38 amplifier connector.
   Fig 4: Checking Harness And Connector (Air Conditioning Amplifier - Body Ground)

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

   Standard voltage

   Tester Connection	Condition	Specified Condition
   D38-22 (BLWH) - D38-20 (GND2)	Ignition switch on (IG) Blower switch OFF	4.5 to 5.5 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the air conditioning amplifier with its connectors still connected.
   Fig 5: Checking Air Conditioning Amplifier With Waveform Reference

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. 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	BLWH (D38-22) - GND2 (D38-20)
   Tool Setting	1 V/DIV., 500 μsec./DIV.
   Condition	Ignition switch on (IG) Blower switch LO

NG → See step   10 

OK → See step   8