Lexus ES manuals

Lexus ES: Front Side Marker Light Circuit

Lexus ES (XZ10) Service Manual / Vehicle Interior / Lighting (ext) / Lighting System (for Hv Model) / Front Side Marker Light Circuit

DESCRIPTION

When the light control switch is in the tail or head position, the main body ECU (multiplex network body ECU) sends an illumination request signal to the headlight ECU sub-assembly to illuminate the front side marker lights.

WIRING DIAGRAM

for LED Type Turn Signal Light

for Bulb Type Turn Signal Light (for TMC Made)

for Bulb Type Turn Signal Light (for TMMK Made)

CAUTION / NOTICE / HINT

NOTICE:

  • If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight ECU sub-assembly LH.*1

    Click here

  • If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.*2

    Click here

  • If the headlight assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.*3

    Click here

  • Inspect the front side marker light bulb before performing the following procedure.*2
  • When replacing the headlight ECU sub-assembly LH, always replace it with a new one. If a headlight ECU sub-assembly LH which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
    • *1: for LED Type Turn Signal Light
    • *2: for Bulb Type Turn Signal Light
    • *3: for Bulb Type Turn Signal Light (for TMMK Made)

PROCEDURE

1.

CONFIRM MODEL

(a) Choose the model to be inspected.

Result

Proceed to

for LED Type Turn Signal Light

A

for Bulb Type Turn Signal Light

B
B

GO TO STEP 5

A

2.

CHECK LIGHTS

(a) Check the illumination of each front side marker lights.

Result

Proceed to

LH side front side marker light does not illuminate

A

RH side front side marker light does not illuminate

B
B

GO TO STEP 4

A

3.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / AFS / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > AFS > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Clearance Light

Parking lights

OFF or ON

-
Body Electrical > AFS > Active Test

Tester Display

Clearance Light

OK:

Front side marker light illuminate.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

GO TO STEP 9

4.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / AFS (Sub) / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > AFS (Sub) > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Clearance Light

Parking lights

OFF or ON

-
Body Electrical > AFS (Sub) > Active Test

Tester Display

Clearance Light

OK:

Front side marker light illuminate.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

GO TO STEP 16

5.

CHECK LIGHTS

(a) Check the illumination of each front side marker lights.

Result

Proceed to

LH side front side marker light does not illuminate

A

RH side front side marker light does not illuminate

B
B

GO TO STEP 13

A

6.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / HL AutoLeveling / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > HL AutoLeveling > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Clearance Light

Parking lights

OFF or ON

-
Body Electrical > HL AutoLeveling > Active Test

Tester Display

Clearance Light

OK:

Front side marker light illuminate.

Result

Proceed to

OK

A

NG (for TMC Made)

B

NG (for TMMK Made)

C
A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

C

GO TO STEP 11

B

7.

CHECK HEADLIGHT CORD LH

(a) Interchange the headlight cord LH with RH and connect the connectors.

Click here

NEXT

8.

CHECK OPERATION (FRONT SIDE MARKER LIGHT)

(a) Check that the front side marker light operates normally.

OK:

Front side marker light operates normally.

NG

REPLACE HEADLIGHT CORD LH

OK

9.

CHECK HEADLIGHT UNIT ASSEMBLY LH

(a) Interchange the headlight unit assembly LH with RH and connect the connectors.

for LED Type Turn Signal Light: Click here

for Bulb Type Turn Signal Light: Click here

NEXT

10.

CHECK OPERATION (FRONT SIDE MARKER LIGHT)

(a) Check that the front side marker light operates normally.

OK:

Front side marker light operates normally.

OK

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

NG

REPLACE HEADLIGHT UNIT ASSEMBLY LH

11.

CHECK HEADLIGHT ASSEMBLY LH

(a) Remove each headlight ECU sub-assembly, interchange the headlight assembly LH with RH and connect the connectors.

Click here

NEXT

12.

CHECK OPERATION (FRONT SIDE MARKER LIGHT)

(a) Check that the front side marker light operates normally.

OK:

Front side marker light operates normally.

OK

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

NG

REPLACE HEADLIGHT ASSEMBLY LH

13.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / HL AutoLeveling (Sub) / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > HL AutoLeveling (Sub) > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Clearance Light

Parking lights

OFF or ON

-
Body Electrical > HL AutoLeveling (Sub) > Active Test

Tester Display

Clearance Light

OK:

Front side marker light illuminate.

Result

Proceed to

OK

A

NG (for TMC Made)

B

NG (for TMMK Made)

C
A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

C

GO TO STEP 18

B

14.

CHECK HEADLIGHT CORD RH

(a) Interchange the headlight cord RH with LH and connect the connectors.

Click here

NEXT

15.

CHECK OPERATION (FRONT SIDE MARKER LIGHT)

(a) Check that the front side marker light operates normally.

OK:

Front side marker light operates normally.

NG

REPLACE HEADLIGHT CORD RH

OK

16.

CHECK HEADLIGHT UNIT ASSEMBLY RH

(a) Interchange the headlight unit assembly RH with LH and connect the connectors.

for LED Type Turn Signal Light: Click here

for Bulb Type Turn Signal Light: Click here

NEXT

17.

CHECK OPERATION (FRONT SIDE MARKER LIGHT)

(a) Check that the front side marker light operates normally.

OK:

Front side marker light operates normally.

OK

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

NG

REPLACE HEADLIGHT UNIT ASSEMBLY RH

18.

CHECK HEADLIGHT ASSEMBLY RH

(a) Remove each headlight ECU sub-assembly, interchange the headlight assembly RH with LH and connect the connectors.

Click here

NEXT

19.

CHECK OPERATION (FRONT SIDE MARKER LIGHT)

(a) Check that the front side marker light operates normally.

OK:

Front side marker light operates normally.

OK

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

NG

REPLACE HEADLIGHT ASSEMBLY RH

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