Diagnosis Procedure
1.CHECK CONNECTOR
Turn the ignition switch OFF.
Disconnect the battery cable from the negative terminal.
Check the following terminals and connectors for damage, bend and loose connection (connector side and harness side).
Harness connector B1
Harness connector M6
2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
. Disconnect the following harness connectors.
Harness connectors B208 and B32
Harness connectors B1 and M6
Check the continuity between the harness connectors.

3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

Malfunction area chart
Main line between dlc and hvac circuitU1243 display unit
DTC Logic
Diagnosis Procedure
1.CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT
Check display unit power supply and ground circuit
2.CHECK CONTINUITY OF COMMUNICATION CIRCUIT
Turn ignition switch OFF.
Disconnect display unit connector M142 and AV control unit
connector M163.
...
Key cylinder switch
Description
The main power window and door lock/unlock switch detects
condition of the door key cylinder switch and
transmits to BCM as the LOCK or UNLOCK signal.
Component Function Check
1.CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL
Check KEY CYL UN-SW, KEY CYL UN-SW in "DATA MONITOR" mode ...
U1000 CAN comm circuit
Description
CAN (Controller Area Network) is a serial communication line for real time
application. It is an on-vehicle multiplex communication line with high data
communication speed and excellent error detection ability. Many electronic
control units are equipped on a vehicle and each contr ...