Toyota Corolla Cross: System Diagram
SYSTEM DIAGRAM
SYSTEM DIAGRAM

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SYSTEM DESCRIPTION
HEATED STEERING WHEEL SYSTEM
(a) The steering heater warms up the steering wheel when the steering heater
switch is turned on.
(b) The steering heater uses a control thermostat
CAUTION / NOTICE / HINT
HINT:
Use these procedures to troubleshoot the heated steering wheel system.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
PROBLEM SYMPTOMS TABLE
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
SEE MORE:
PRECAUTION PRECAUTIONS FOR REFRIGERANT HFO-1234yf (R1234yf)
(a) Compatibility (1) The parts used in the refrigerant cycle, the compressor oil, etc. of an HFO-1234yf (R1234yf) system are not compatible with a conventional HFC-134a (R134a) system.
(b) HFO-1234yf (R1234yf) Refrigerant (1) Always us
DESCRIPTION
The main relay is built into the electric brake booster (brake
booster with master cylinder assembly).
When the electric brake booster (brake booster with master cylinder
assembly) detects a malfunction in a circuit necessary for main relay to operate,
or in the main relay itself