Lexus NX: Lock Function does not Operate (Close &)

Lexus NX Service Manual / Vehicle Exterior / Door / Hatch / Power Back Door System / Lock Function does not Operate (Close &)

DESCRIPTION

The door control switch signal is sent to the multiplex network door ECU. If the power back door system does not operate when the door control switch is operated, the door control switch circuit may be malfunctioning.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the replacement, removal and installation of the multiplex network door ECU or disconnection of the connectors of the multiplex network door ECU has been performed, initialize the power back door system.

Click here

PROCEDURE

1.

READ VALUE USING TECHSTREAM

(a) Read the Data List according to the display on the Techstream.

Click here

Body Electrical > Back Door > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Close and Lock SW

Door control switch signal

ON or OFF

ON: Door control switch pushed

OFF: Door control switch not pushed

-

Body Electrical > Back Door > Data List

Tester Display

Close and Lock SW

OK:

The door control switch functions as specified in the normal condition column.

OK

REPLACE MULTIPLEX NETWORK DOOR ECU

NG

2.

INSPECT DOOR CONTROL SWITCH

(a) Remove the door control switch.

Click here

(b) Inspect the door control switch.

Click here

NG

REPLACE DOOR CONTROL SWITCH

OK

3.

CHECK HARNESS AND CONNECTOR (DOOR CONTROL SWITCH - MULTIPLEX NETWORK DOOR ECU AND BODY GROUND)

(a) Disconnect the Y29 door control switch connector.

(b) Disconnect the Y26 multiplex network door ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

Y29-5 (CLLS) - Y26-10 (CLSW)

Always

Below 1 Ω

Y29-2 (E) - Body ground

Always

Below 1 Ω

Y29-5 (CLLS) or Y26-10 (CLSW) - Body ground

Always

10 kΩ or higher

OK

REPLACE MULTIPLEX NETWORK DOOR ECU

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

READ NEXT:

 Power Back Door Touch Sensor

 Components

COMPONENTS ILLUSTRATION *1 BACK DOOR CENTER GARNISH *2 BACK DOOR LOCK COVER *3 BACK DOOR SIDE GARNISH LH *4 BACK DOOR SIDE GARNISH RH *5 BACK DOOR TRIM BASE *6 BACK DOOR

 Removal

REMOVAL CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH and LH sides. The procedure listed below is for the LH side. PROCEDURE 1. REMOVE BACK DOOR CENTER GARNISH Click here

SEE MORE:

 Reassembly

REASSEMBLY PROCEDURE 1. INSTALL REAR BUMPER PAD HINT: When installing the rear bumper pad, heat the rear bumper cover and rear bumper pad using a heat light. Use the same procedure described for the other side. Standard: Item Temperature Rear Bumper Cover 20 to 30°C (68 to 86°F

 Customize Parameters

CUSTOMIZE PARAMETERS CUSTOMIZE INTUITIVE PARKING ASSIST SYSTEM (a) Customizing with the Techstream. NOTICE: When the customer requests a change in a function, first make sure that the function can be customized. Be sure to make a note of the current settings before customizing. When troublesh

© 2016-2025 Copyright www.lexunx.com