Lexus NX: Data List / Active Test




Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.


In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

(a) Turn the power switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / Combination Meter or AFS* / Data List.

  • *: w/ Headlight Cleaner System, for Triple Beam Headlight

(f) According to the display on the Techstream, read the Data List.

Body Electrical > Combination Meter > Data List

Tester Display

Measurement Item


Normal Condition

Diagnostic Note

Washer Switch

Level warning switch condition


ON: Fluid volume is less than 600 to 800 cc (36.6 to 48.8

OFF: Fluid volume is more than 600 to 800 cc (36.6 to 48.8


Body Electrical > AFS > Data List

Tester Display

Measurement Item


Normal Condition

Diagnostic Note

Front Window Washer Switch

Washer switch condition


ON: Windshield wiper switch assembly (front washer switch) on

OFF: Windshield wiper switch assembly (front washer switch) off

w/ Headlight Cleaner System


 Headlight Cleaner Motor and Relay Circuit

DESCRIPTION The headlight ECU sub-assembly RH controls the headlight cleaner motor and pump assembly. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: First check that the front washer operates norm

 Washer Fluid Level Warning Switch Circuit

DESCRIPTION When the volume of washer fluid decreases to below a certain level (when the level warning switch assembly is turned on), the multi-information display warns the driver by displaying a mes

 Wiper Ecu


 Driving assist systems

To keep driving safety and performance, the following systems operate automatically in response to various driving situations. Be aware, however, that these systems are supplementary and should not be relied upon too heavily when operating the vehicle. Summary of the driving assist systems

 Steering Angle Sensor Communication Error (C1784)

DESCRIPTION Steering sensor signals are sent to the absorber control ECU via CAN communication. When there is a communication malfunction, the malfunction will be detected by the diagnosis function. DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate C1784 S

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