Toyota CH-R Service Manual: Meter Illumination is Always Dark

Toyota CH-R Service Manual / Meter / Gauge / Display / Meter / Gauge System / Meter Illumination is Always Dark

DESCRIPTION

The combination meter assembly receives signals from this circuit to adjust the illumination of the combination meter assembly. The combination meter assembly sets the illumination level based on the user operation of the light control rheostat switch.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

    Click here

  • When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly 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: w/ Smart Key System

HINT:

  • The meter illumination dims when the taillights are turned on.
  • Setting the meter illumination level to maximum brightness cancels the above dimming of the meter illumination.
  • Setting the meter illumination level to minimum brightness turns off the meter illumination.
  • The automatic light control sensor sensitivity can be customized.

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PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check if CAN communication DTCs are output.

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Result

Proceed to

CAN communication DTCs are not output.

A

CAN communication DTCs are output.

B
B

GO TO CAN COMMUNICATION SYSTEM

A

2.

CHECK FOR DTC

(a) Check if lighting system DTCs are output.

Click here

Body Electrical > Main Body > Trouble Codes

Result

Proceed to

DTC B1244 is not output.

A

DTC B1244 is output.

B
B

GO TO DTC B1244

A

3.

REPLACE COMBINATION METER ASSEMBLY

(a) Replace the combination meter assembly.

Click here

OK:

The operation of the combination meter assembly returns to normal.

OK

END
NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

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    DESCRIPTION In this circuit, the combination meter assembly receives auto dimmer signals from the main body ECU (multiplex network body ECU) via CAN communication. When the combination meter asse ...

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