Subaru Crosstrek Service Manual: Dtc u0424 invalid data received from hvac control module
CONTINUOUSLY VARIABLE TRANSMISSION (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0424 INVALID DATA RECEIVED FROM HVAC CONTROL MODULE
NOTE:
Refer to “LAN SYSTEM (DIAGNOSTICS)” for diagnostic procedure. Basic Diagnostic Procedure">
1. OUTLINE OF DIAGNOSIS
• Detect malfunction of CAN communication.
• Judge as NG when data received from the A/C control panel is not normal.
2. EXECUTION CONDITION
Secondary parameters | Execution condition |
12 V battery system voltage | ≥ 10 V |
Measured turbine shaft speed | > 0 rpm |
or | |
Transmission range | Drive or Reverse |
3. DIAGNOSTIC METHOD
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Malfunction Criteria | Threshold Value |
CAN data from A/C control panel | Freeze |
Time Needed for Diagnosis: 2 seconds
Malfunction Indicator Light Illumination: Does not illuminate.
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