Dtc C1763 Abnormal Pump Motor Oil Pressure

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTC

INSPECT FOR FLUID LEAK

INSPECT SUSPENSION CONTROL RELAY (AHC)

CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - RELAY (AHC) AND BODY GROUND)

CHECK HARNESS AND CONNECTOR (BATTERY - SUSPENSION CONTROL RELAY)

CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL RELAY - PUMP AND MOTOR AND BODY GROUND)

CHECK OPERATION OF HEIGHT CONTROL PUMP AND MOTOR

DTC C1763 Abnormal Pump Motor Oil Pressure


DESCRIPTION


DTC Code
Detection Condition
Trouble Area
C1763
When either of the following conditions is met:
  1. While the motor relay is in operation, the condition that the fluid pressure is 0.6 MPa (6.1 kgf/cm2, 87 psi) or less continues for 0.6 seconds.
  2. When the vehicle is climbing a slope, no changes are detected in the fluid pressure for 8 seconds 3 times consecutively.
  1. Fluid level low
  2. Harness or connector
  3. Suspension control relay
  4. Height control pump and motor
  5. Suspension control ECU

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Suspension Control.Suspension Control System. Dtc C1763 Abnormal Pump Motor Oil Pressure


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.CHECK FOR DTC

  1. Check for DTCs (Click here).

Result:
Result
Proceed to
C1763 only is output
A
C1718 is output simultaneously
B


B
GO TO DTC CHART (C1718) (Click here)
A


2.INSPECT FOR FLUID LEAK

  1. Inspect for fluid leaks (Click here).

    OK:
    No fluid leakage.


NG
REPAIR FLUID LEAK OR REPLACE LEAKING PART(S)
OK


3.INSPECT SUSPENSION CONTROL RELAY (AHC)

  1. Remove the suspension control relay from the engine room relay block.



    Land Cruiser. Urj200, 202 Grj200 Vdj200.Suspension Control.Suspension Control System. Dtc C1763 Abnormal Pump Motor Oil Pressure

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3 - 5
    		Battery voltage is not applied to terminal 1 and 2
    		10 kΩ or higher
    Battery voltage is applied to terminal 1 and 2
    		Below 1 Ω


NG
REPLACE SUSPENSION CONTROL RELAY
OK


4.CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - RELAY (AHC) AND BODY GROUND)

Land Cruiser. Urj200, 202 Grj200 Vdj200.Suspension Control.Suspension Control System. Dtc C1763 Abnormal Pump Motor Oil Pressure

  1. Remove the suspension control relay from the engine room relay block.

  1. Disconnect the K36 ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    K36-16 (RC) - Relay block suspension control relay terminal 1
    		Always
    		Below 1 Ω
    K36-16 (RC) - Body ground
    		Always
    		10 kΩ or higher
    Relay block suspension control relay terminal 2 - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK HARNESS AND CONNECTOR (BATTERY - SUSPENSION CONTROL RELAY)

  1. Remove the suspension control relay from the engine room relay block.



    Land Cruiser. Urj200, 202 Grj200 Vdj200.Suspension Control.Suspension Control System. Dtc C1763 Abnormal Pump Motor Oil Pressure

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    Relay block suspension control relay terminal 5 - Body ground
    		Always
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


6.CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL RELAY - PUMP AND MOTOR AND BODY GROUND)

  1. Remove the suspension control relay from the engine room relay block.

  1. Disconnect the L36 pump and motor connector.



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


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Suspension Control.Suspension Control System. Dtc C1763 Abnormal Pump Motor Oil Pressure

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Relay block suspension control relay terminal 3 - L36-2
    		Always
    		Below 1 Ω
    Relay block suspension control relay terminal 3 - Body ground
    		Always
    		10 kΩ or higher
    L36-1 - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


7.CHECK OPERATION OF HEIGHT CONTROL PUMP AND MOTOR


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Suspension Control.Suspension Control System. Dtc C1763 Abnormal Pump Motor Oil Pressure

  1. Remove the height control pump and motor (Click here).

  1. Apply battery voltage to the height control pump and motor and check the operation of the motor.

    OK:
    Measurement Condition
    		Specified Condition
    Battery positive (+) → Terminal 2
    Battery negative (-) → Terminal 1
    		Motor operates
    NOTICE:
    1. Be careful of fluid spray when the height control pump and motor is operating.
    2. Do not allow the motor to operate for 60 seconds or more.
    3. If the height control pump and motor is shorted, locked, or has a similar type of malfunction, a large amount of current will be flowing. Therefore, if the motor does not operate, immediately stop this inspection.


NG
REPLACE HEIGHT CONTROL PUMP AND MOTOR (Click here)
OK

REPLACE SUSPENSION CONTROL ECU (Click here)