Honda Civic manuals

Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc u0424 invalid data received from hvac control module

DTC DETECTING CONDITION:

Defective data was transmitted from A/C CM.

TROUBLE SYMPTOM:

Cooperation control of air conditioner does not operate properly.

STEPCHECKYESNO

1.CHECK PERFORMING OF BASIC DIAGNOSTIC PROCEDURE.

Was the basic diagnostic procedure performed up to STEP 8-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0424 INVALID DATA RECEIVED FROM HVAC CONTROL MODULE

Perform the basic diagnostic procedure. Basic Diagnostic Procedure

2.CHECK DTC.

Check the displayed DTC.

Are DTCs other than U*** displayed-

Perform the diagnosis according to DTC.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0424 INVALID DATA RECEIVED FROM HVAC CONTROL MODULE

3.CHECK DTC.

Check the displayed DTC.

Is DTC for the bus off or the data no-receive displayed-

Perform the diagnosis according to DTC.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0424 INVALID DATA RECEIVED FROM HVAC CONTROL MODULE

4.CHECK DTC.

Check the displayed DTC.

Is U0424 a current malfunction-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0424 INVALID DATA RECEIVED FROM HVAC CONTROL MODULE

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0424 INVALID DATA RECEIVED FROM HVAC CONTROL MODULE

5.CHECK DTC.

1) Turn the ignition switch to OFF.

2) Disconnect the A/C CM connector.

3) Connect the disconnected connectors.

4) Read the DTC using Subaru Select Monitor.

Is U0424 a current malfunction-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0424 INVALID DATA RECEIVED FROM HVAC CONTROL MODULE

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0424 INVALID DATA RECEIVED FROM HVAC CONTROL MODULE

6.CHECK DTC.

Using the Subaru Select Monitor, read DTC of all the systems.

Is the air conditioner data abnormal detected in several modules-

Replace the A/C CM. Control Unit

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0424 INVALID DATA RECEIVED FROM HVAC CONTROL MODULE

7.REPLACE MODULE.

1) Replace the A/C CM.

2) Read the DTC using Subaru Select Monitor.

Is U0424 a current malfunction-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0424 INVALID DATA RECEIVED FROM HVAC CONTROL MODULE

System is normal.

8.CHECK MODULE.

1) Reinstall the A/C CM.

2) Replace the module that the DTC has been detected.

3) Read the DTC using Subaru Select Monitor.

Is U0424 a current malfunction-

Replace the A/C CM. Control Unit

System is normal.

9.CHECK HARNESS.

1) Shake the harness, and check for poor contact.

2) Read the DTC using Subaru Select Monitor.

Is U0424 a current malfunction-

Repair the poor contact of harness, or replace the harness.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0424 INVALID DATA RECEIVED FROM HVAC CONTROL MODULE

10.CHECK CONNECTOR.

Check the connector used for high speed CAN for poor contact.

Is there poor contact of connector-

Repair the connector that has poor contact, or replace harness.

It is possible that temporary poor communication occurs. Delete the DTC.

Dtc u0427 invalid data received from vehicle security control module
DTC DETECTING CONDITION:Defective data was transmitted from keyless access CM.TROUBLE SYMPTOM:Cooperation control of keyless access does not operate properly.STEPCHECKYESNO1.CHECK PERFORMING OF BASIC ...

Dtc u0423 invalid data received from instrument panel cluster control module
DTC DETECTING CONDITION:Defective data was transmitted from combination meter.TROUBLE SYMPTOM:Display of combination meter does not operate properly.STEPCHECKYESNO1.CHECK PERFORMING OF BASIC DIAGNOSTI ...

Other materials:

Dtc p0197 engine oil temperature sensor "a" circuit low
DTC DETECTING CONDITION:Immediately at fault recognitionTROUBLE SYMPTOM:• Hard to start• Improper idling• Poor driving performanceCAUTION:After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION, and Inspection Mode Inspection Mode > PROC ...

© 2017-2024 Copyright www.sulegacy.com