Toyota CH-R Service Manual: Problem Symptoms Table

Toyota CH-R Service Manual / Seat / Seat Heater System / Problem Symptoms Table



If the battery voltage is low, the seat heater system may not operate. Refer to Data List for power steering system.

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  • 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.
  • Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Seat Heater System


Suspected Area


Driver side seat heater does not operate

Proceed to "Seat Heater for Front Left Seat does not Operate"

Front passenger side seat heater does not operate

Proceed to "Seat Heater for Front Right Seat does not Operate"

    Operation Check
    OPERATION CHECK CHECK FRONT SEAT HEATER (a) Turn the ignition switch to ON. (b) Turn the seat heater switch on and check that the indicator illuminates and the surface of the front seat warms up. ...

    Terminals Of Ecu
    TERMINALS OF ECU CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (for TMMT Made) (a) Disconnect the air conditioning amplifier assembly connector. (b) Measure the voltage and resistance according to th ...

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    Toyota CH-R Service Manual > Lighting System: Headlamp LH Circuit (B2439,B243A)
    DESCRIPTION A DTC is stored when the headlight ECU sub-assembly receives a light source malfunction signal from its respective headlight unit. The headlight ECU sub-assembly LH stores DTC B2439 or B243A. DTC No. Detection Item DTC Detection Condition ...

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    DESCRIPTION The door side airbag sensor LH and door side airbag sensor RH detect impacts to the vehicle through changes in pressure inside the front doors caused by deformation of the outer side of the front doors and send signals to the airbag sensor assembly. Based on the signals sent by the ...

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