Toyota Yaris: Lighting System / Door Unlock Detection Switch Circuit

Toyota Yaris XP210 (2020-2025) Reapir and Service Manual / Vehicle Interior / Lighting (int) / Lighting System / Door Unlock Detection Switch Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) detects the condition of each door unlock detection switch.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

Click here

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

FR Door Lock Position Switch Status

Front door RH unlock detection switch signal

LOCK or UNLOCK

LOCK: Front door RH locked

UNLOCK: Front door RH unlocked

-

FL Door Lock Position Switch Status

Front door LH unlock detection switch signal

LOCK or UNLOCK

LOCK: Front door LH locked

UNLOCK: Front door LH unlocked

-

Body Electrical > Main Body > Data List

Tester Display

FR Door Lock Position Switch Status

FL Door Lock Position Switch Status

OK:

Normal conditions listed above are displayed.

Result

Proceed to

OK

A

NG ("FR Door Lock Position Switch Status" is not normal)

B

NG ("FL Door Lock Position Switch Status" is not normal)

C

A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

C

GO TO STEP 4

B

2.

INSPECT FRONT DOOR LOCK ASSEMBLY LH

Click here

NG

REPLACE FRONT DOOR LOCK ASSEMBLY LH

OK

3.

CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK ASSEMBLY LH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)

(a) Disconnect the H4 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

L11-8 (LSSR) - H4-9 (LSFL)

Always

Below 1 Ω

L11-8 (LSSR) or H4-9 (LSFL)

Always

10 kΩ or higher

L11-7 (E) - Body ground

Always

Below 1 Ω

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.

INSPECT FRONT DOOR LOCK ASSEMBLY RH

Click here

NG

REPLACE FRONT DOOR LOCK ASSEMBLY RH

OK

5.

CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK ASSEMBLY RH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)

(a) Disconnect the H4 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

K11-7 (LSSR) - H4-3 (LSFR)

Always

Below 1 Ω

K11-7 (LSSR) or H4-3 (LSFR) - Body ground

Always

10 kΩ or higher

K11-8 (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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