Active Height Control Suspension Ecu Power Source Circuit

Suspension. Land Cruiser. Urj200, 202 Grj200 Vdj200
Suspension Control. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING GTS (IG POWER SOURCE VOLTAGE)

INSPECT FUSE (ECU-IG NO. 2)

INSPECT COWL SIDE JUNCTION BLOCK LH (IG NO. 1 RELAY)

CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK LH - SUSPENSION CONTROL ECU AND BODY GROUND

CHECK HARNESS AND CONNECTOR (BATTERY - COWL SIDE JUNCTION BLOCK LH)

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - COWL SIDE JUNCTION BLOCK LH AND BODY GROUND)

CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK LH - SUSPENSION CONTROL ECU)

ACTIVE HEIGHT CONTROL SUSPENSION - ECU Power Source Circuit


DESCRIPTION

This circuit supplies the power source to the suspension control ECU.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Suspension Control.Suspension Control System.Active Height Control Suspension Ecu Power Source Circuit


INSPECTION PROCEDURE

NOTICE:
  1. Before performing troubleshooting, inspect the connectors of related circuits.
  2. If the suspension control ECU or height control sensor is replaced, the vehicle height offset calibration must be performed (Click here).
1.READ VALUE USING GTS (IG POWER SOURCE VOLTAGE)

  1. Turn the engine switch off.

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG) and the GTS on.

  1. Read the "IG Power Source Voltage" item in the Data List..

    AHC
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    IG Power Source Voltage
    		Power supply voltage /
    min.: 0 V
    max.: 255 V
    		Engine switch on (IG): 11 to 14 V
    		-
    OK:
    11 to 14 V


NG
Go to step 2
OK

CHECK INDICATOR CIRCUIT (Click here)

2.INSPECT FUSE (ECU-IG NO. 2)

  1. Remove the ECU-IG No. 2 fuse from the cowl side junction block LH.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    ECU-IG No. 2 fuse
    		Always
    		Below 1 Ω


NG
Go to step 7
OK


3.INSPECT COWL SIDE JUNCTION BLOCK LH (IG NO. 1 RELAY)

  1. Disconnect the K34 suspension control ECU connector.



    Land Cruiser. Urj200, 202 Grj200 Vdj200.Suspension Control.Suspension Control System.Active Height Control Suspension Ecu Power Source Circuit

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    K34-5 (IG) - Body ground
    		Engine switch on (IG)
    		11 to 14 V
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to Suspension Control ECU)


NG
Go to step 4
OK

REPLACE SUSPENSION CONTROL ECU (Click here)

4.CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK LH - SUSPENSION CONTROL ECU AND BODY GROUND

  1. Disconnect the K34 and K35 suspension control ECU connectors.

  1. Disconnect the 2K cowl side junction block LH connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    K34-5 (IG) - 2K-29
    		Always
    		Below 1 Ω
    K34-1 (GND) - Body ground
    		Always
    		Below 1 Ω
    K35-6 (GND) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK HARNESS AND CONNECTOR (BATTERY - COWL SIDE JUNCTION BLOCK LH)

  1. Disconnect the 2G cowl side junction block LH connector.



    Land Cruiser. Urj200, 202 Grj200 Vdj200.Suspension Control.Suspension Control System.Active Height Control Suspension Ecu Power Source Circuit

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    2G-1 - Body ground
    		Always
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Cowl Side Junction Block LH)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


6.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - COWL SIDE JUNCTION BLOCK LH AND BODY GROUND)

Land Cruiser. Urj200, 202 Grj200 Vdj200.Suspension Control.Suspension Control System.Active Height Control Suspension Ecu Power Source Circuit


Text in Illustration
*a
Front view of wire harness connector
(to Cowl Side Junction Block LH)
-
-

  1. Disconnect the 2I and 2J cowl side junction block LH connectors.

  1. Measure the voltage and resistance according to the value(s) in the tables below.

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    2I-18 - Body ground
    		Engine switch on (IG)
    		11 to 14 V
    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2J-1 - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


7.CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK LH - SUSPENSION CONTROL ECU)

  1. Disconnect the K34 suspension control ECU connector.



    Land Cruiser. Urj200, 202 Grj200 Vdj200.Suspension Control.Suspension Control System.Active Height Control Suspension Ecu Power Source Circuit

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    K34-5 (IG) - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to Suspension Control ECU)
    HINT:
    If a fuse is blown, replace the fuse.


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE COWL SIDE JUNCTION BLOCK LH