DTC/circuit diagnosis
U0121 VDC CAN 2
DTC Logic
DTC DETECTION LOGIC
NOTE:
If DTC U0121 is displayed with DTC U1000, first perform the trouble diagnosis
for DTC U1000. Refer to DAS-
106, "DISTANCE SENSOR : DTC Logic".
CONSULT Display
DTC Detection Condition
Possible Cause
...
System
System Diagram
Compressor
Pressure relief valve
Liquid tank
Refrigerant pressure sensor
Condenser
Expansion valve
Evaporator
Blower motor
High-pressure gas
High-pressure liquid
Low-pressure liquid
Low-pressure gas
Suction port
Discharge port ...
Steering switch
Description
When one of the steering switches is pushed, the resistance in the steering
switch changes the signal to
identify which button is controlling the information display.
Diagnosis Procedure
Regarding Wiring Diagram information, refer to MWI-32, "Wiring Diagram".
1.CHECK STE ...