Last Modified: 7-3-2017 6.8:8.0.40 Doc ID: RM000001CU5004X
Model Year Start: 2007 Model: LX470 Prod Date Range: [08/2006 -           ]
Title: SUSPENSION CONTROL: ACTIVE HEIGHT CONTROL SUSPENSION: C1719; Oil Temperature Sensor Circuit Malfunction; 2007 MY LX470 [08/2006 -        ]

DTC

C1719

Oil Temperature Sensor Circuit Malfunction

DESCRIPTION

This circuit is sending the data to detect the fluid temperature of the pump and to judge the abnormality of the fluid by the ECU.

HINT:

"Oil temperature sensor" refers to the fluid temperature sensor.

DTC No.

DTC Detection Condition

Trouble Area

C1719/19

When detecting the abnormal signal from the fluid temp. sensor (Fluid temp. sensor terminal voltage of ECU is 0.1 V or less or 4.8 V or more) for every 0.01 sec. and that condition continued for 0.5 sec. and had been consisted 10 times.
  • Fluid temperature sensor
  • Suspension control ECU
  • Wire harness

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

When using the intelligent tester, start from *1. When not using the intelligent tester, start from *2

PROCEDURE

1.

READ VALUE USING INTELLIGENT TESTER (TEMPERATURE SENSOR)*1

(a) Connect the intelligent tester (with CAN VIM) to the DLC3.

(b) Turn the ignition switch ON and push the intelligent tester main switch ON.

(c) Select the DATA LIST mode on the intelligent tester.

(d) Check the temperature value of the fluid temperature sensor displayed on the intelligent tester.

OK:

Same as actual fluid temperature

OK

REPLACE SUSPENSION CONTROL ECU

NG

2.

INSPECT FLUID TEMPERATURE SENSOR*2

(a) Disconnect the fluid temperature sensor connector.

(b) Measure the resistance between terminals 1 and 2 of the fluid temperature sensor connector.

Standard resistance:

Tester Connection

Specified Condition

1 - 2

2.45 +- 0.45 kΩ at 20°C (68°F)
NG

REPLACE FLUID TEMPERATURE SENSOR

OK

3.

CHECK WIRE HARNESS (FLUID TEMPERATURE SENSOR - SUSPENSION CONTROL ECU)
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

REPLACE SUSPENSION CONTROL ECU