ACTIVE HEIGHT CONTROL SUSPENSION, Diagnostic DTC:C1763

DTC Code DTC Name
C1763 Abnormal Pump Motor Oil Pressure

DESCRIPTION

DTC Code Detection Condition Trouble Area
C1763

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.

  • Harness or connector

  • Suspension control relay

  • Height control pump and motor

  • Suspension control ECU

WIRING DIAGRAM

A01EODOE02

INSPECTION PROCEDURE

Note


  • Before performing troubleshooting, inspect the connectors of related circuits.

  • If the suspension control ECU or height control sensor is replaced, the vehicle height offset calibration must be performed Click here.

PROCEDURE


  1. INSPECT SUSPENSION CONTROL RELAY (AHC)


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

    2. A01EN96E01

      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

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

    A01EP1SE02

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

    2. Disconnect the K32 ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K32-16 (RC) - Relay block suspension control relay terminal 1 Always Below 1 Ω
      K32-16 (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

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


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

    2. A01EPQYE01

      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

  4. 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.

    2. Disconnect the L44 pump and motor connector.

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

      A01EQTUE02
      Standard Resistance
      Tester Connection Condition Specified Condition
      Relay block suspension control relay terminal 3 - L44-2 Always Below 1 Ω
      Relay block suspension control relay terminal 3 - Body ground Always 10 kΩ or higher
      L44-1 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK OPERATION OF HEIGHT CONTROL PUMP AND MOTOR


    1. A01ESHAE01

      Remove the height control pump and motor Click here.

    2. 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

      Note


      • Be careful of fluid spray when the height control pump and motor is operating.

      • Do not allow the motor to operate for 60 seconds or more.

      • 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