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
When the ignition switch is turned to ON, auxiliary battery voltage is applied
to terminal MREL of the ECM through the coil of the EFI-MAIN relay. This causes
the EFI-MAIN relay to close, which supplies power to terminal +B of the TCM.
WIRING DIAGRAM
Refer to DTC U010087.
Click h
INSTALLATION CAUTION / NOTICE / HINT COMPONENTS (INSTALLATION)
Procedure Part Name Code
1 VACUUM SENSOR GROMMET
- -
- -
2 VACUUM SENSOR ASSEMBLY
89420H
- -
3 BRAKE MASTER CYLINDER SUB-ASSEMBLY
472
System Description
ECU Power Source Circuit
