Dtc C1763 Abnormal Pump Motor Oil Pressure
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
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 | 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
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WIRING DIAGRAM
INSPECTION PROCEDURE
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 ().
| 1.INSPECT SUSPENSION CONTROL RELAY (AHC) |
Remove the suspension control relay from the engine room relay block.
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 |
| | REPLACE SUSPENSION CONTROL RELAY |
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| 2.CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - RELAY (AHC) AND BODY GROUND) |
Remove the suspension control relay from the engine room relay block.
Disconnect the K36 ECU connector.
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 |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| 3.CHECK HARNESS AND CONNECTOR (BATTERY - SUSPENSION CONTROL RELAY) |
Remove the suspension control relay from the engine room relay block.
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 |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| 4.CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL RELAY - PUMP AND MOTOR AND BODY GROUND) |
Remove the suspension control relay from the engine room relay block.
Disconnect the L36 pump and motor connector.
Measure the resistance according to the value(s) in the table below.
- 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 |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| 5.CHECK OPERATION OF HEIGHT CONTROL PUMP AND MOTOR |
Remove the height control pump and motor ().
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 |
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.
| | REPLACE HEIGHT CONTROL PUMP AND MOTOR ()
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| OK | |
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| REPLACE SUSPENSION CONTROL ECU ()
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