Toyota Yaris: Power Mirror Control System / Power Retractable Mirrors do not Operate with Power Retract Mirror Switch

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Vehicle Exterior / Mirror (ext) / Power Mirror Control System / Power Retractable Mirrors do not Operate with Power Retract Mirror Switch

DESCRIPTION

When the outer mirror switch assembly is operated, the mirror retract/return signal is sent to the main body ECU (multiplex network body ECU) and then to power distribution box assembly via CXPI communication.

The power distribution box assembly retracts or returns the outer rear view mirror assemblies based on the signal.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • If the main body ECU (multiplex network body ECU) is replaced, refer to the Registration.

    Click here

  • The power mirror control system uses the CXPI communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the power mirror control system after confirming that the communication system is functioning properly.

PROCEDURE

1.

READ VALUE USING GTS (Outer Mirror Fold Switch)

(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

Outer Mirror Fold Switch

Retractable outer mirror switch signal

OFF or ON

OFF: Retractable outer mirror switch not in retract position

ON: Retractable outer mirror switch in retract position

-

Body Electrical > Main Body > Data List

Tester Display

Outer Mirror Fold Switch

OK:

On the GTS screen, ON or OFF is displayed accordingly.

NG

GO TO STEP 12

OK

2.

CHECK VEHICLE CONDITION

(a) Check the malfunctioning parts.

Result

Proceed to

Both outer rear view mirror assemblies are malfunctioning

A

Outer rear view mirror assembly LH is malfunctioning

B

Outer rear view mirror assembly RH is malfunctioning

C

B

GO TO STEP 8

C

GO TO STEP 10

A

3.

PERFORM ACTIVE TEST USING GTS

(a) Perform the Active Test according to the display on the GTS.

Body Electrical > Main Body > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Mirror Fold Signal

Retract mirror operation

OFF or ON

-

Mirror Return Signal

Retract mirror operation

OFF or ON

-

Body Electrical > Main Body > Active Test

Tester Display

Mirror Fold Signal

Body Electrical > Main Body > Active Test

Tester Display

Mirror Return Signal

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

4.

READ VALUE USING GTS (Power Retract Mirror Input Signal)

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

Body Electrical > Power Distribution Box > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Power Retract Mirror Input Signal

Power retract mirror drive signal (Input)

Stop, Retract, Return

Stop: Outer rear view mirror assembly not move

Retract: Outer mirror switch in retract position

Return: Outer mirror switch in return position

-

Body Electrical > Power Distribution Box > Data List

Tester Display

Power Retract Mirror Input Signal

OK:

The GTS display changes correctly according to the outer mirror switch assembly operation.

NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

OK

5.

CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - OUTER REAR VIEW MIRROR ASSEMBLY)

(a) Disconnect the 4C power distribution box assembly connector.

(b) Disconnect the L14 outer rear view mirror assembly LH connector.

(c) Disconnect the K14 outer rear view mirror assembly RH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

4C-10 - L14-10 (MF)

Always

Below 1 Ω

4C-10 - K14-10 (MF)

Always

Below 1 Ω

4C-21 - L14-11 (MR)

Always

Below 1 Ω

4C-21 - K14-11 (MR)

Always

Below 1 Ω

4C-10 - Body Ground

Always

10 kΩ or higher

4C-21 - Body Ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.

INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH

Click here

NG

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH

OK

7.

INSPECT OUTER REAR VIEW MIRROR ASSEMBLY RH

Click here

OK

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

NG

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH

8.

INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH

Click here

NG

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH

OK

9.

CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - OUTER REAR VIEW MIRROR ASSEMBLY LH)

(a) Disconnect the 4C power distribution box assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

4C-10 - L14-10 (MF)

Always

Below 1 Ω

4C-21 - L14-11 (MR)

Always

Below 1 Ω

OK

USE SIMULATION METHOD TO CHECK

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.

INSPECT OUTER REAR VIEW MIRROR ASSEMBLY RH

Click here

NG

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH

OK

11.

CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - OUTER REAR VIEW MIRROR ASSEMBLY RH)

(a) Disconnect the 4C power distribution box assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

4C-10 - K14-10 (MF)

Always

Below 1 Ω

4C-21 - K14-11 (MR)

Always

Below 1 Ω

OK

USE SIMULATION METHOD TO CHECK

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

12.

INSPECT OUTER MIRROR SWITCH ASSEMBLY

Click here

NG

REPLACE OUTER MIRROR SWITCH ASSEMBLY

OK

13.

CHECK HARNESS AND CONNECTOR (OUTER MIRROR SWITCH ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the H5 main body ECU (multiplex network body ECU).

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

L12-9 (MAT) - H5-26 (AMR)

Always

Below 1 Ω

L12-10 (MR) - H5-27 (RET)

Always

Below 1 Ω

L12-8 (E) - Body ground

Always

Below 1 Ω

L12-9 (MAT) or H5-26 (AMR) - Body ground

Always

10 kΩ or higher

L12-10 (MR) or H5-27 (RET) - Body ground

Always

10 kΩ or higher

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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