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 INTELLIGENT TESTER (IG POWER SOURCE VOLTAGE)

INSPECT FUSE (ECU-IG NO. 4)

INSPECT COWL SIDE JUNCTION BLOCK RH (IG NO. 4 RELAY)

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

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

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

CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK RH - 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 INTELLIGENT TESTER (IG POWER SOURCE VOLTAGE)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG) and the tester 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. 4)

  1. Remove the ECU-IG No. 4 fuse from the cowl side junction block RH.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    ECU-IG No. 4 fuse
    		Always
    		Below 1 Ω


NG
Go to step 7
OK


3.INSPECT COWL SIDE JUNCTION BLOCK RH (IG NO. 4 RELAY)

  1. Disconnect the K34 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


NG
Go to step 4
OK

REPLACE SUSPENSION CONTROL ECU (Click here)

4.CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK RH - ECU AND BODY GROUND)

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

  1. Disconnect the K34 and K35 ECU connectors.

  1. Disconnect the 3C cowl side junction block RH connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    K34-5 (IG) - 3C-5
    		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 RH)

  1. Disconnect the 3A cowl side junction block RH 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
    3A-1 - Body ground
    		Always
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


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

  1. Disconnect the 3C cowl side junction block RH connector.



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

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    3C-22 - Body ground
    		Engine switch on (IG)
    		11 to 14 V
    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3C-8 - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


7.CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK RH - ECU)

  1. Disconnect the K34 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
    HINT:
    If a fuse is blown, replace the fuse.


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE COWL SIDE JUNCTION BLOCK RH