Lexus NX: Relay

On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT FRONT WIPER DEICER RELAY

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 - 5

Auxiliary battery voltage is not applied between terminals 1 and 2

10 kΩ or higher

Auxiliary battery voltage is applied between terminals 1 and 2

Below 1 Ω

If the result is not as specified, replace the front wiper deicer relay.

2. INSPECT DEFOGGER RELAY

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 - 4

Auxiliary battery voltage is not applied between terminals 1 and 2

Below 1 Ω

Auxiliary battery voltage is applied between terminals 1 and 2

10 kΩ or higher

3 - 5

Auxiliary battery voltage is not applied between terminals 1 and 2

10 kΩ or higher

Auxiliary battery voltage is applied between terminals 1 and 2

Below 1 Ω

4 - 5

Always

10 kΩ or higher

If the result is not as specified, replace the defogger relay.

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 Window Defogger System

 Parts Location

PARTS LOCATION ILLUSTRATION *1 AIR CONDITIONING CONTROL ASSEMBLY - REAR WINDOW DEFOGGER SWITCH *2 INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - ECU-IG NO.1 FUSE - ECU-IG NO.3 FUSE *3 DLC3

 System Diagram

SYSTEM DIAGRAM Communication Table Transmitter Receiver Signal Communication Method Air Conditioning Control Assembly Air Conditioning Amplifier Assembly Rear window defogger switch

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 System Diagram

SYSTEM DIAGRAM Communication Table Transmitting ECU Receiving ECU Signal Communication Method Main body ECU (multiplex network body ECU) Multiplex network door ECU Combination switch assembly signal Back door opener switch assembly signal Power back door ON/OFF signal

 Rear Occupant Classification Sensor LH Collision Detection (B1787)

DESCRIPTION DTC B1787 is stored when the occupant detection ECU receives a collision detection signal, which is sent by the rear occupant classification sensor LH when an accident occurs. DTC B1787 is also stored when the front seat adjuster assembly RH is subjected to a strong impact, even if an ac

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