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:
TERMINALS OF ECU AIRBAG ECU ASSEMBLY
Terminal No. Terminal Symbol
Destination O1-3
PLR- Rear pretensioner squib LH (Rear seat outer belt assembly LH)
O1-4 PLR+
O1-5 PL+
Driver side pretensioner squib (Front seat outer belt assembly LH)
O1
REASSEMBLY CAUTION / NOTICE / HINT COMPONENTS (REASSEMBLY)
Procedure Part Name Code
1 REAR SIDE MARKER LIGHT BULB
81550S -
- -
2 REAR SIDE MARKER LIGHT SOCKET
- -
- -
*A for Bulb Type Clearance Light
- -
*1