C1719

SUSPENSION CONTROL: ACTIVE HEIGHT CONTROL SUSPENSION: C1719: Oil Temperature Sensor Circuit Malfunction

DTC C1719 - Oil Temperature Sensor Circuit Malfunction

DESCRIPTION

This circuit is used for sending the data to detect the fluid temperature of the pump. The abnormality of the fluid 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 Testing and Inspection.

PROCEDURE

1. READ VALUE USING TECHSTREAM (OIL TEMPERATURE SENSOR)
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG) and the Techstream on.
(d) Enter the following menus: Chassis / AHC / Data List.
(e) According to the display on the Techstream, read the Data List.

AHC

OK:
Same as actual fluid temperature
NG -- CHECK HARNESS AND CONNECTOR (TEMPERATURE SENSOR - SUSPENSION CONTROL ECU)
OK -- Continue to next step.
2. RECONFIRM DTC OUTPUT
(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
(b) Perform a road test.
(c) Check for DTCs.

Result

B -- USE SIMULATION METHOD TO CHECK
A -- REPLACE SUSPENSION CONTROL ECU
3. CHECK HARNESS AND CONNECTOR (TEMPERATURE SENSOR - SUSPENSION CONTROL ECU)
NOTICE:
When inspecting the wire harness between the suspension control ECU and temperature sensor, it is difficult to determine the malfunctioning area if there is a sensor power supply malfunction. Therefore, disconnect the connectors for the temperature sensor, the acceleration sensors (front RH, front LH) and pressure accumulator sensor on the ECU side.
(a) Disconnect the K30 and K31 ECU connectors.
(b) Disconnect the e1 sensor connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. INSPECT FLUID TEMPERATURE SENSOR
(a) Connect the e1 temperature sensor connector.
(b) Disconnect the K30 and K31 ECU connectors.

NG -- REPLACE HEIGHT CONTROL PUMP AND MOTOR
OK -- REPLACE SUSPENSION CONTROL ECU