Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Automatic High Beam Switch Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) detects the ON/OFF signal of the automatic high beam switch (turn signal switch).

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

for HEV Model: Click here

for Gasoline Model: Click here

  • *1: w/ Smart Key System

PROCEDURE

1.

READ VALUE USING GTS

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

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Auto High Beam Main Switch

Adaptive high beam switch signal

OFF or ON

OFF: Adaptive high beam switch not pressed

ON: Adaptive high beam switch pressed

-

Body Electrical > Main Body > Data List

Tester Display

Auto High Beam Main Switch

OK:

Normal conditions listed above are displayed.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

INSPECT AUTO HIGH BEAM SWITCH

Click here

NG

REPLACE AUTO HIGH BEAM SWITCH

OK

3.

INSPECT HARNESS AND CONNECTOR (AUTO HIGH BEAM SWITCH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)

(a) Disconnect the I85 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I52-5 (+B) -I85-14 (AHBI)

Always

Below 1 Ω

I52-5 (+B) - Body ground

Always

10 kΩ or higher

I52-2 (E) - Body ground

Always

Below 1 Ω

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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