Air Conditioning System (For Manual Air Conditioning System) Blower Motor Circuit

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Heating Air Conditioning. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING GTS (BLOWER MOTOR)

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

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

CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

CHECK BLOWER WITH FAN MOTOR SUB-ASSEMBLY

AIR CONDITIONING SYSTEM (for Manual Air Conditioning System) - Blower Motor Circuit


DESCRIPTION

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

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Manual Air Conditioning System) Blower Motor Circuit


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.PERFORM ACTIVE TEST USING GTS (BLOWER MOTOR)

  1. Select the Active Test, use the GTS to generate a control command, and then check that the blower with fan motor sub-assembly operates (Click here).

    Air Conditioner
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Blower Motor
    		Blower with fan motor sub-assembly
    		Min.: 0, Max.: 31
    		-
    OK:
    Blower with fan motor sub-assembly is operated normally using GTS.


NG
Go to step 2
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)

2.CHECK HARNESS AND CONNECTOR (BLOWER WITH FAN MOTOR SUB-ASSEMBLY - BATTERY AND BODY GROUND)
Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Manual Air Conditioning System) Blower Motor Circuit

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

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A29-1 (GND) - Body ground
    		Always
    		Below 1 Ω

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A29-3 (+B) - Body ground
    		Always
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Blower with Fan Motor Sub-assembly)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


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

  1. Disconnect the A29 blower with fan motor sub-assembly connector.

  1. Disconnect the E81 air conditioning amplifier assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A29-2 (SI) - E81-22 (BLW)
    		Always
    		Below 1 Ω
    A29-2 (SI) or E81-22 (BLW) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Manual Air Conditioning System) Blower Motor Circuit

  1. Using an oscilloscope, check the waveform

    Measurement Condition
    Item
    		Content
    Terminal No. (Symbol)
    		A29-2 (SI) - Body ground
    Tool Setting
    		1 V/DIV., 500 μs/DIV.
    Condition
    1. Ignition switch ON
    2. Blower switch LO
OK:
Waveform is as shown in the illustration.
Text in Illustration
*a
Component with harness connected
(Blower with Fan Motor Sub-assembly)
HINT:
Waveform varies with the blower level.


NG
Go to step 5
OK

REPLACE BLOWER WITH FAN MOTOR SUB-ASSEMBLY (Click here)

5.CHECK BLOWER WITH FAN MOTOR SUB-ASSEMBLY

  1. Replace the blower with fan motor sub-assembly with a new or known good one (Click here).

  1. Check that the air conditioning system is operated normally.

    OK:
    Air conditioning system is operated normally.


NG
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)
OK

END (BLOWER WITH FAN MOTOR SUB-ASSEMBLY WAS DEFECTIVE)