Description
CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Modern vehicle is equipped with many electronic control unit, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart, refer to LAN-24, "CAN Communication Signal Chart".
DTC Logic
DTC DETECTION LOGIC

Diagnosis Procedure
1.PERFORM SELF DIAGNOSTIC
Turn ignition switch ON and wait for 2 seconds or more.
Check "Self Diagnostic Result".
U1010 control unit (CAN)Explanation of scheduled maintenance items
The following descriptions are provided to give
you a better understanding of the scheduled
maintenance items that should be regularly
checked or replaced. The maintenance schedule
indicates at which mileage/time intervals each
item requires service.
In addition to scheduled maintenance, you ...
Horn function
Symptom Table
HAZARD AND HORN REMINDER FUNCTION MALFUNCTION
NOTE:
Before performing the diagnosis in the following table, check
"Work flow". Refer to DLK-9, "Work Flow".
If the following symptoms are detected, check systems shown in
the "Diagnosis/service procedure" column
...
Lighting & turn signal switch
Removal and Installation
NOTE: The lighting and turn signal switch is
integral with the combination switch assembly.
REMOVAL
Unlock steering wheel.
CAUTION:
Before servicing, disconnect both battery terminals and wait
at least three minutes
Do not use air tools or electric tools ...