Subaru Crosstrek Service Manual: Dtc u0073 control module communication bus off
CONTINUOUSLY VARIABLE TRANSMISSION (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0073 CONTROL MODULE COMMUNICATION BUS OFF
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 CAN communication failure has occurred.
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 bus condition | Bus off |
Time Needed for Diagnosis: 2 seconds
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
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 MODULENOTE:Refer to “LAN SYSTEM (DI ...
Dtc u1235 lost communication with eyesight
CONTINUOUSLY VARIABLE TRANSMISSION (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC U1235 LOST COMMUNICATION WITH EyeSightNOTE:Refer to “LAN SYSTEM (DIAGNOSTICS)&rdq ...
Other materials:
Removal
GLASS/WINDOWS/MIRRORS > Front Regulator and Motor AssemblyREMOVAL1. Disconnect the ground cable from battery and wait for at least 60 seconds before starting work. NOTE">2. Remove the trim panel - front door. Door Trim > REMOVAL">3. Remove the sealing cover - front door. Fro ...
Inspection
TELEMATICS SYSTEM (DIAGNOSTICS) > Subaru Select MonitorINSPECTION1. COMMUNICATION FOR INITIALIZING IMPOSSIBLEWhen communication with DCM is impossibleDetecting condition:• Defective harness connector• Power supply circuit malfunction• Defective DCM• Defective CAN communica ...
Check power supply and ground line of engine control module (ecm)
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostics for Engine Starting FailureCHECK POWER SUPPLY AND GROUND LINE OF ENGINE CONTROL MODULE (ECM)CAUTION:After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION">, and Inspection Mode Inspection Mode > ...