Toyota Corolla Cross: Diagnosis System
DIAGNOSIS SYSTEM
DESCRIPTION
The main body ECU (multiplex network body ECU) and certification ECU (smart key
ECU assembly) control the LIN communication system. LIN communication system data
and Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector
3 (DLC3).
When the system seems to be malfunctioning, use the GTS to check for malfunctions
and perform repairs.
CHECK DLC3
(a) Check the DLC3.
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INSPECT AUXILIARY BATTERY VOLTAGE
(a) Measure the auxiliary battery voltage with the ignition switch off.
Standard Voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the auxiliary battery.
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DATA LIST / ACTIVE TEST
DATA LIST
NOTICE:
In the table below, the values listed under "Normal Condition" are reference
values. Do not depend solely on these reference values when decidi
DIAGNOSTIC TROUBLE CODE CHART
LIN Communication System
DTC No.
Detection Item
Link
B120687
P/W Master SW System Missing Message
DESCRIPTION
This DTC is stored when LIN communication between the main body ECU (multiplex
network body ECU) and multiplex network master switch assembly, front power window
regulator motor assem
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Precaution
PRECAUTION
PRECAUTION
(a) Before disassembling the transfer assembly, thoroughly clean it to remove
any foreign matter. This will help prevent contamination inside the transfer during
disassembly and reassembly.
(b) When removing the transfer cover or any other light alloy parts
INSIDE VEHICLE
These are maintenance and inspection items that are considered to be the
owner's responsibility.
The owner can do them or they can have them done at a service center.
These items include those that should be checked on a daily basis, those
that in most cases do not r
