Diagnosis Procedure
1.CHECK CONNECTOR
2.CHECK HARNESS FOR OPEN CIRCUIT

3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the AV control unit. Refer to the following.
M&A branch line circuit
HVAC branch line circuitDiagnosis system (HVAC)
CONSULT Function
CONSULT can display each diagnosis item using the diagnosis test modes as
shown.
CONSULT application items
SELF DIAGNOSTIC RESULT
Display Item List
*: Perform self-diagnosis under sunshine. When performing indoors, aim a
light (more than 60 W) at sunload sensor, ...
CAN communication circuit
Diagnosis Procedure
1.CONNECTOR INSPECTION
Turn the ignition switch OFF.
Disconnect the battery cable from the negative terminal.
Disconnect all the unit connectors on CAN communication system.
Check terminals and connectors for damage, bend and loose
connection.
2.CHECK HARNESS CON ...
Steering switch
Description
When one of the steering wheel audio control switches is pushed, the
resistance in the steering wheel audio
control switch circuit changes, depending on which button is pushed.
Diagnosis Procedure
1.CHECK STEERING WHEEL AUDIO CONTROL SWITCH RESISTANCE
Turn ignition switch ...