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 - ENGINE ROOM RELAY BLOCK AND BODY GROUND)

CHECK HARNESS AND CONNECTOR (BATTERY - ENGINE ROOM RELAY BLOCK)

CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL RELAY - HEIGHT CONTROL 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 (AHC)
  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 (AHC) 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 (AHC)
OK


4.CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - ENGINE ROOM RELAY BLOCK AND BODY GROUND)

  1. Remove the suspension control relay (AHC) from the engine room relay block.

  1. Disconnect the K36 suspension control 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) - Engine room relay block suspension control relay (AHC) terminal 1
    		Always
    		Below 1 Ω
    K36-16 (RC) or Engine room relay block suspension control relay (AHC) terminal 1 - Body ground
    		Always
    		10 kΩ or higher
    Engine room relay block suspension control relay (AHC) terminal 2 - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK HARNESS AND CONNECTOR (BATTERY - ENGINE ROOM RELAY BLOCK)

  1. Remove the suspension control relay (AHC) 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
    Engine room relay block suspension control relay (AHC) terminal 5 - Body ground
    		Always
    		11 to 14 V
    Text in Illustration
    *1
    		Engine Room Relay Block
    *a
    		Front view of wire harness connector
    (to Suspension Control Relay (AHC))


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


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

  1. Remove the suspension control relay (AHC) from the engine room relay block.

  1. Disconnect the L86 height control pump and motor connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Engine room relay block suspension control relay (AHC) terminal 3 - L86-2
    		Always
    		Below 1 Ω
    Engine room relay block suspension control relay (AHC) terminal 3 or L86-2 - Body ground
    		Always
    		10 kΩ or higher
    L86-1 - 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
    Text in Illustration
    *a
    		Component without harness connected
    (Height Control Pump and Motor)
    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)