C1718

SUSPENSION CONTROL: ACTIVE HEIGHT CONTROL SUSPENSION: C1718: Pressure Sensor Circuit Malfunction
C1718 - Pressure Sensor Circuit Malfunction

DESCRIPTION

This circuit is used for sending the data to detect the pressure output from the pump. The abnormality of the fluid pressure is judged by the ECU.

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. CHECK HARNESS AND CONNECTOR (PRESSURE SENSOR - SUSPENSION CONTROL ECU)

NOTICE:
When inspecting the wire harness between the suspension control ECU and pressure sensor, it is difficult to determine the malfunctioning area if there is a sensor power supply malfunction. Therefore, disconnect the connectors for the pressure sensor, the acceleration sensors (front RH, front LH) and fluid temperature sensor on the ECU side.

(a) Disconnect the e2 pressure sensor connector.

(b) Disconnect the K30 and K31 ECU connectors.

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

2. CHECK SUSPENSION CONTROL ECU

(a) Connect the K30 and K31 suspension control ECU connectors.

(b) Disconnect the e2 pressure sensor connector.

NG -- REPLACE SUSPENSION CONTROL ECU Removal
OK -- Continue to next step.

3. CHECK PRESSURE SENSOR

(a) Connect the K30 and K31 suspension control ECU connectors.

(b) Connect the e2 pressure sensor connector.

(c) Start the engine and push the up button of the height control switch to activate height control.

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

Standard Voltage:

NG -- REPLACE HEIGHT CONTROL PUMP AND MOTOR Removal

OK -- REPLACE SUSPENSION CONTROL ECU Removal