Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Daytime Running Light Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the daytime running lights.

WIRING DIAGRAM

for LED Type Parking Light

for Bulb Type Parking Light

CAUTION / NOTICE / HINT

NOTICE:

  • Before replacing the main body ECU (multiplex network body ECU), refer to Registration.*1

    Click here

  • First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CAN communication malfunctions before troubleshooting this symptom.

    Click here

  • First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CXPI communication malfunctions before troubleshooting this symptom.

    for HEV Model: Click here

    for Gasoline Model: Click here

    • *1: w/ Smart Key System

PROCEDURE

1.

PERFORM ACTIVE TEST USING GTS

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

Body Electrical > Main Body > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Daytime Running Light

Daytime running lights

OFF or ON

-

Body Electrical > Main Body > Active Test

Tester Display

Daytime Running Light

OK:

Clearance lights and daytime running lights illuminate.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

CONFIRM MODEL

(a) Choose the model to be inspected.

Result

Proceed to

for LED Parking Light

A

for Bulb Parking Light

B

B

GO TO STEP 5

A

3.

CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY - POWER DISTRIBUTION BOX ASSEMBLY)

(a) Disconnect the A131 headlight assembly LH connector.

(b) Disconnect the A134 headlight assembly RH connector

(c) Disconnect the 8E power distribution box assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A131-1 (AT1) - 8E-5

Always

Below 1 Ω

A134-1 (AS1) - 8E-5

Always

Below 1 Ω

A131-1 (AT1) - Body ground

Always

10 kΩ or higher

A134-1 (AS1) - Body ground

Always

10 kΩ or higher

8E-5 - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CHECK POWER DISTRIBUTION BOX ASSEMBLY

(a) Remove the power distribution box assembly.

HINT:

Click here

(b) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

(c) Disconnect the 8E power distribution box assembly connector.

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

*a

Component without harness connected

(Power Distribution Box Assembly)

-

-

Standard Resistance

Tester Connection

Condition

Specified Condition

MB-22 (CXPI) - 8E-5

Always

Below 1 Ω

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

5.

CHECK HARNESS AND CONNECTOR (DAYTIME RUNNING LIGHT ASSEMBLY LH - BODY GROUND)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

B10-1(E) - Body ground

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.

CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY - POWER DISTRIBUTION BOX ASSEMBLY)

(a) Disconnect the A131 headlight assembly LH connector.

(b) Disconnect the A134 headlight assembly RH connector.

(c) Disconnect the 8E power distribution box assembly connector.

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

A131-6 (B) - 8E-3

Always

Below 1 Ω

A134-6 (B) - 8E-3

Always

Below 1 Ω

A131-6 (B) - Body ground

Always

10 kΩ or higher

A134-6 (B) - Body ground

Always

10 kΩ or higher

8E-3 - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

7.

CHECK POWER DISTRIBUTION BOX ASSEMBLY

(a) Remove the power distribution box assembly.

HINT:

Click here

(b) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

(c) Disconnect the 8E power distribution box assembly connector.

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

*a

Component without harness connected

(Power Distribution Box Assembly)

-

-

Standard Resistance

Tester Connection

Condition

Specified Condition

MB-22 (CXPI) - 8E-5

Always

Below 1 Ω

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

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