Subaru Crosstrek Service Manual: Dtc u0073 control module communication bus off

Subaru Crosstrek Service Manual / Engine (diagnostics)(h4do) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc u0073 control module communication bus off

ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC U0073 CONTROL MODULE COMMUNICATION BUS OFF

NOTE:

For the diagnostic procedure, refer to LAN section. Basic Diagnostic Procedure">

1. OUTLINE OF DIAGNOSIS

Detect malfunction of CAN communication.

Judge as NG when CAN communication failure has occurred.

2. COMPONENT DESCRIPTION

(Common Specifications)

CAN Protocol 2.0 B (Active)

Frame Format: 11 Bit ID Frame (Standard Frame)

Conforms to ISO11898

Communication Speed: 500 kbps

3. EXECUTION CONDITION

Secondary Parameters	Execution condition
Battery voltage	≥ 10.9 V

4. GENERAL DRIVING CYCLE

Perform the diagnosis continuously after starting the engine.

5. DIAGNOSTIC METHOD

Judge as NG when the following conditions are established.

Judgment Value

Malfunction Criteria	Threshold Value
CAN bus condition	Bus off

Time Needed for Diagnosis: 436 ms

Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.

Dtc u0423 invalid data received from instrument panel cluster control module

ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC U0423 INVALID DATA RECEIVED FROM INSTRUMENT PANEL CLUSTER CONTROL MODULENOTE:For the diagnostic procedure, re ...

Dtc p0128 coolant thermostat (engine coolant temperature below thermostat regulating temperature)

ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC P0128 COOLANT THERMOSTAT (ENGINE COOLANT TEMPERATURE BELOW THERMOSTAT REGULATING TEMPERATURE)DTC detecting co ...

Other materials:

If you park your vehicle in case of an emergency
Models with multi function display Models without multi function display The hazard warning flasher should be used in day or night to warn other drivers when you have to park your vehicle under emergency conditions. Avoid stopping on the road. It is best to safely pull off the roa ...

Inspection
LIGHTING SYSTEM > Headlight SystemINSPECTION1. AUTO HEADLIGHT SYSTEM CHECKSTEPCHECKYESNO1.CHECK HEADLIGHT ILLUMINATION.Set the lighting switch to the switch 1 (TAIL/PARKING) and switch 2 (HEAD).Do the tail and headlight illuminate? Headlight System > INSPECTION">Go to Step 2.Check the ...

Dtc p2270 o2 sensor signal biased/stuck lean bank 1 sensor 2
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC P2270 O2 SENSOR SIGNAL BIASED/STUCK LEAN BANK 1 SENSOR 2DTC detecting condition:Detected when two consecutive driving cycles with fault occur.CAUTION:After servicing or replacing faulty parts, perform Clear Me ...