Other information:
DTC Description
DTC DETECTION LOGIC DTC No. CONSULT screen terms DTC detection condition
C1A21–48
UNIT HIGH TEMP
(Unit high temperature)
Diagnosis condition
When Ignition switch is ON.
Signal (terminal)
—
Threshold
Temperature around distance sensor (ICC sensor) is high...
Trouble Diagnosis For Unusual Pressure
Diagnose using a manifold gauge whenever system’s high and/or low side pressure(s) is/are unusual. The marker above the gauge scale in the following tables indicates the standard (usual) pressure range.
Symptom Table
Gauge indication Refrigerant cycle Probable cause Corrective action
Both high and low pressure sides are too high...