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 A/C auto amp. Refer to the following.
M&A branch line circuit
STRG branch line circuitICC system limitations
WARNING
Listed below are the system limitations for
the ICC system. Failure to operate the
vehicle in accordance with these system
limitations could result in serious injury or
death.
The ICC system is primarily intended for
use on straight, dry, open roads with
light traffic. It is ...
Vehicle load capacity
Do not exceed the load limit of your vehicle
shown as "The combined weight of
occupants and cargo" on the Tire and
Loading Information label. Do not exceed
the number of occupants shown as
"Seating Capacity" on the Tire and Loading
Information label.
To get "the combined weight of occupants ...
U1218 AV control unit
DTC Logic
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DTC Logic
U121A AV CONTROL UNIT
DTC Logic
U121B AV CONTROL UNIT
DTC Logic
U121C AV CONTROL UNIT
DTC Logic
...