Lexus NX: Power Switch Illumination Circuit

Lexus NX Service Manual / Vehicle Interior / Lighting (int) / Lighting System / Power Switch Illumination Circuit

DESCRIPTION

The illuminated entry system controls the power switch illumination.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Recognition code registration is necessary when replacing the main body ECU (multiplex network body ECU).
  • If the main body ECU (multiplex network body ECU) is replaced, refer to Registration.

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM (POWER/ENGINE SW LIGHT)

(a) Using the GTS, perform the Active Test.

Click here

Body Electrical > Entry&Start > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Power/Engine SW Light

Power switch illumination

ON or OFF

-

Body Electrical > Entry&Start > Active Test

Tester Display

Power/Engine SW Light

OK:

Power switch illumination illuminates.

Power switch illumination illuminates

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Power switch illumination does not illuminate

2.

INSPECT POWER SWITCH

(a) Remove the power switch.

Click here

(b) Inspect the power switch.

Click here

NG

REPLACE POWER SWITCH

OK

3.

CHECK HARNESS AND CONNECTOR (POWER SWITCH - CERTIFICATION ECU [SMART KEY ECU ASSEMBLY])

(a) Disconnect the I16 power switch connector.

(b) Disconnect the I53 certification ECU (smart key ECU assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I16-9 (SWIL) - I53-17 (SWIL)

Always

Below 1 Ω

I16-6 (AGND) - I53-12 (AGND)

Always

Below 1 Ω

I16-9 (SWIL) or I53-17 (SWIL) - Body ground

Always

10 kΩ or higher

I16-6 (AGND) or I53-12 (AGND) - Body ground

Always

10 kΩ or higher

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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