Toyota CH-R Service Manual: Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

NOTICE:

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

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  • If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight ECU sub-assembly LH.*2

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  • 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
  • *2: for LED Headlight

HINT:

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

Headlight(for Halogen Headlight)

Symptom

Suspected Area

Link

Left low beam headlight does not illuminate

No. 1 headlight bulb

Harness or connector

-

Right low beam headlight does not illuminate

No. 1 headlight bulb

Harness or connector

-

Both left and right low beam headlights do not illuminate

Headlight dimmer switch circuit

Low beam headlight circuit

Main body ECU (Multiplex network body ECU)

Left high beam headlight does not illuminate

Headlight unit assembly LH

Harness or connector

-

Right high beam headlight does not illuminate

Headlight unit assembly RH

Harness or connector

-

Both left and right high beam headlights do not illuminate

Headlight dimmer switch circuit

High beam headlight circuit

Main body ECU (Multiplex network body ECU)

High Flash (passing function) does not operate (high beam headlights are normal)

Headlight dimmer switch circuit

Main body ECU (Multiplex network body ECU)

Headlight(for LED Headlight)

Symptom

Suspected Area

Link

Left low beam headlight does not illuminate

Headlight unit assembly LH

Headlight ECU sub-assembly LH

Right low beam headlight does not illuminate

Headlight unit assembly RH

Headlight ECU sub-assembly RH

Both left and right low beam headlights do not illuminate

Headlight dimmer switch circuit

Main body ECU (Multiplex network body ECU)

Left high beam headlight does not illuminate

High beam headlight circuit

Headlight unit assembly LH

Headlight ECU sub-assembly LH

Right high beam headlight does not illuminate

High beam headlight circuit

Headlight unit assembly RH

Headlight ECU sub-assembly RH

Both left and right high beam headlights do not illuminate

Headlight dimmer switch circuit

Main body ECU (Multiplex network body ECU)

High Flash (passing function) does not operate (high beam headlights are normal)

Headlight dimmer switch circuit

Main body ECU (Multiplex network body ECU)

Left low beam headlight, high beam headlight, daytime running light and clearance light do not illuminate

Power source circuit

Headlight ECU sub-assembly LH

Right low beam headlight, high beam headlight, daytime running light and clearance light do not illuminate

Power source circuit

Headlight ECU sub-assembly RH

Parking Light (Clearance Light)/Daytime Running Light

Symptom

Suspected Area

Link

Left parking light (clearance light)/daytime running light does not illuminate*1

Headlight unit assembly LH

Harness or connector

-

Left clearance light/daytime running light does not illuminate*2

Clearance Light/Daytime running light circuit

Headlight ECU sub-assembly LH

Right parking light (clearance light)/daytime running light does not illuminate*1

Headlight unit assembly RH

Electric parking brake system

Harness or connector

-

Right clearance light/daytime running light does not illuminate*2

Clearance Light/Daytime running light circuit

Headlight ECU sub-assembly RH

Both left and right parking light (clearance light)/ do not illuminate*1

Electric parking brake system

Headlight dimmer switch circuit

Daytime running light relay circuit

Main body ECU (Multiplex network body ECU)

Both left and right clearance lights do not illuminate*2

Electric parking brake system

Headlight dimmer switch circuit

Main body ECU (Multiplex network body ECU)

  • *1: for Halogen Headlight
  • *2: for LED Headlight
Taillight

Symptom

Suspected Area

Link

Left or right taillight and rear side marker light (rear combination light assembly) do not illuminate*1

Rear combination light socket and wire

Rear combination light LED

Harness or connector

-

Left or right taillight (rear combination light assembly) do not illuminate*2

Rear combination light assembly

Harness or connector

-

Left or right taillight (rear light assembly) does not illuminate*2

Rear light assembly

Harness or connector

-

All of the taillights and license plate lights do not illuminate

Headlight dimmer switch circuit

Taillight relay circuit

Main body ECU (Multiplex network body ECU)

  • *1: w/ Toyota Safety Sense P
  • *2: for LED Headlight
License Plate Light

Symptom

Suspected Area

Link

Left or right license plate light does not illuminate

License plate light assembly

Harness or connector

-

Stop Light

Symptom

Suspected Area

Link

Left or right stop light (rear combination light assembly) does not illuminate*1

Rear combination light assembly

Harness or connector

-

Left or right stop light (rear combination light assembly) does not illuminate*2

Rear combination light socket and wire

Rear combination light LED

Harness or connector

-

Center stop light does not illuminate

Center stop light assembly

Harness or connector

-

All of the stop lights do not illuminate

STOP fuse

-

Stop light switch assembly

Harness or connector

-

  • *1: for LED Headlight
  • *2: for Halogen Headlight
Front Fog Light (w/ Fog Light)

Symptom

Suspected Area

Link

Left or right front fog light does not illuminate*1

Fog light assembly

Harness or connector

-

Left or right front fog light does not illuminate*2

Fog light bulb

-

Harness or connector

-

Both left and right front fog lights do not illuminate (taillights are normal)

Headlight dimmer switch circuit

Front fog light circuit

Main body ECU (Multiplex network body ECU)

  • *1: for LED Type
  • *2: for Bulb Type
Back-up Light

Symptom

Suspected Area

Link

Left or right back-up light does not illuminate*1

BKUP LP Relay

Back-up light bulb

-

Back up light socket

Harness or connector

-

Left or right back-up light does not illuminate*2

Back-up light bulb

-

Back up light socket

Harness or connector

-

Left or right back-up light does not illuminate*3

Rear light assembly

Harness or connector

-

Both left and right back-up lights do not illuminate

Park/neutral position switch assembly

Instrument panel junction block assembly

Harness or connector

-

  • *1: w/ Toyota Safety Sense P
  • *2: for Halogen Headlight
  • *3: for LED Headlight
Turn Signal Light

Symptom

Suspected Area

Link

Left or right front turn signal light does not operate*1

Meter/gauge system

Front turn signal light bulb

-

Front turn signal light socket

Harness or connector

-

Left or right front turn signal light does not operate*2

Meter/gauge system

Headlight unit assembly LH

Headlight ECU sub-assembly LH

Left or right rear turn signal light does not operate*1

Meter/gauge system

Rear combination light socket and wire

Rear turn signal light bulb

-

Harness or connector

-

Left or right rear turn signal light does not operate*2

Meter/gauge system

Rear combination light assembly

Headlight ECU sub-assembly LH

Left or right side turn signal light does not operate

Side turn signal bulb

Side turn signal light assembly

Outer rear view mirror assembly

Harness or connector

-

Turn signal lights do not operate in one direction

Meter/gauge system

Turn signal switch circuit

All turn signal lights do not operate

Turn signal switch circuit

Combination meter assembly

All turn signal lights do not flash at the correct speed

Combination meter assembly

  • *1: for Halogen Headlight
  • *2: for LED Headlight
Hazard Warning Signal Light

Symptom

Suspected Area

Link

Hazard warning signal lights do not operate

Hazard warning switch circuit

Combination meter assembly

Hazard warning signal switch indicator does not illuminate

Hazard warning signal switch assembly

Combination meter assembly

Harness or connector

-

Automatic Light Control System

Symptom

Suspected Area

Link

Automatic light control system does not operate

Headlight dimmer switch circuit

Main body ECU (Multiplex network body ECU)

Light Auto Turn-off System

Symptom

Suspected Area

Link

Light auto turn-off system does not operate

Headlight dimmer switch circuit

IG signal circuit

Door courtesy switch circuit

Main body ECU (Multiplex network body ECU)

Door Mirror Foot Light Control (w/ Door Mirror Foot Light)

Symptom

Suspected Area

Link

All of the door mirror foot lights do not illuminate

Power door lock control system

Wireless door lock control system (w/ Smart Key System)

Smart key system (for Entry Function) (w/ Smart Key System)

Door unlock detection switch circuit

Footwell light circuit

Main body ECU (Multiplex network body ECU)

Left or right door mirror foot light does not illuminate

Door mirror foot light

Harness or connector

-

Follow Me Home System (w/o Toyota Safety Sense P)

Symptom

Suspected Area

Link

Follow me home system does not operate

IG signal circuit

Headlight dimmer switch circuit

Main body ECU (Multiplex network body ECU)

    Initialization
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