C1763

SUSPENSION CONTROL: ACTIVE HEIGHT CONTROL SUSPENSION: C1763: Abnormal Pump Motor Oil Pressure
C1763 - Abnormal Pump Motor Oil Pressure

DESCRIPTION





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
- 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 Programming and Relearning.

PROCEDURE

1. INSPECT SUSPENSION CONTROL RELAY (AHC)

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

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





Standard Resistance:





NG -- REPLACE SUSPENSION CONTROL RELAY
OK -- Continue to next step.

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





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

(b) Disconnect the K32 ECU connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

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

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

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





Standard Voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

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

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

(b) Disconnect the L44 pump and motor connector.

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





Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. CHECK OPERATION OF HEIGHT CONTROL PUMP AND MOTOR

(a) Remove the height control pump and motor Removal.





(b) Apply battery voltage to the height control pump and motor and check the operation of the motor.

OK:





NOTICE:
- 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 Removal

OK -- REPLACE SUSPENSION CONTROL ECU Removal