Lexus NX: Battery Thermometer Sensor

On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT THERMISTOR ASSEMBLY

(a) Disconnect the thermistor assembly connector.

*a

Component without harness connected

(Thermistor Assembly)

*b

Sensing Portion

*c

Resistance

*d

Temperature

*e

Allowable Range

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 - 2

10°C (50°F)

3.00 to 3.73 kΩ

1 - 2

15°C (59°F)

2.45 to 2.88 kΩ

1 - 2

20°C (68°F)

1.95 to 2.30 kΩ

1 - 2

25°C (77°F)

1.60 to 1.80 kΩ

1 - 2

30°C (86°F)

1.28 to 1.47 kΩ

1 - 2

35°C (95°F)

1.00 to 1.22 kΩ

1 - 2

40°C (104°F)

0.80 to 1.00 kΩ

1 - 2

45°C (113°F)

0.65 to 0.85 kΩ

1 - 2

50°C (122°F)

0.50 to 0.70 kΩ

1 - 2

55°C (131°F)

0.44 to 0.60 kΩ

1 - 2

60°C (140°F)

0.36 to 0.50 kΩ

NOTICE:

  • Hold the sensor only by its connector. Touching the sensor may change the resistance value.
  • When measuring, the sensor temperature must be the same as the ambient temperature.

HINT:

As the temperature increases, the resistance decreases (see the graph).

If the resistance is not as specified, replace the thermistor assembly.

READ NEXT:

 Charging System

 Precaution

PRECAUTION CAUTION: Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated g

 System Diagram

SYSTEM DIAGRAM

SEE MORE:

 Headlamp LH Circuit (B2439,B243A)

DESCRIPTION This DTC is output when the headlight ECU sub-assembly receives an abnormal signal from the headlight unit. The headlight ECU sub-assembly LH outputs DTC B2439 and B243A DTC No. Detection Item DTC Detection Condition Trouble Area B2439 Headlamp LH Circuit Headlight ECU s

 Calibration

CALIBRATION DESCRIPTION (a) After replacing any VSC related components or performing wheel alignment adjustment, clear and read the sensor calibration data. Refer to the table below and then perform the necessary operation according to the part to be replaced in order to perform calibration. Part

© 2016-2025 Copyright www.lexunx.com