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
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DESCRIPTION
The skid control ECU (brake actuator assembly) communicates
with the following ECUs and sensors via CAN communication.
ECM
TCM
Yaw rate and acceleration sensor (airbag ECU assembly)
Steering sensor
Power steering ECU assembly
Main body ECU (multiplex network body EC
DESCRIPTION
The airbag ECU assembly has a built-in yaw rate and acceleration
sensor and detects the vehicle condition.
Code
Tester Display
Measurement Item
Trouble Area
X0456
Yaw Rate Sensor Wrong Installation
His