Air Conditioning System (For Automatic Air Conditioning System) Generator Signal Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - GENERATOR)

AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System) - Generator Signal Circuit


DESCRIPTION

When the engine is started, the generator assembly turns on and a voltage pulse signal is generated.
This signal is used by the air conditioning amplifier assembly.
The signal expressing the amount of output from the generator assembly is one element of PTC heater control.

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Generator Signal Circuit


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - GENERATOR)

  1. Disconnect the G25 amplifier connector.

  1. Disconnect the D3*1 or C65*2 generator connector.

    1. *1: for 1GR-FE
    2. *2: for 1KD-FTV

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

    Standard Resistance:
    for 1GR-FE
    Tester Connection
    		Condition
    		Specified Condition
    G25-25 (ALT) - D3-3 (M)
    		Always
    		Below 1 Ω
    G25-25 (ALT) - Body ground
    		Always
    		10 kΩ or higher
    for 1KD-FTV
    Tester Connection
    		Condition
    		Specified Condition
    G25-25 (ALT) - C65-3 (M)
    		Always
    		Below 1 Ω
    G25-25 (ALT) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (LandCruiser RM0000045E302NX.html)