Subaru Crosstrek Service Manual: Dtc u0422 invalid data received from body control module

DTC DETECTING CONDITION:

Defective data was transmitted from body integrated unit.

TROUBLE SYMPTOM:

Cooperation control with body integrated unit does not operate properly.

1.CHECK PERFORMING OF BASIC DIAGNOSTIC PROCEDURE.

Was the basic diagnostic procedure performed up to STEP 3?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE">Go to Step 2.

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 U0422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE">Go to Step 3.

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 U0422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE">Go to Step 4.

4.CHECK DTC.

Check the displayed DTC.

Is U0422 a current malfunction?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE">Go to Step 5.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE">Go to Step 9.

5.CHECK DTC.

1) Turn the ignition switch to OFF.

2) Disconnect the body integrated unit connector.

3) Connect the disconnected connectors.

4) Read the DTC using Subaru Select Monitor. Read Diagnostic Trouble Code (DTC)">

Is U0422 a current malfunction?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE">Go to Step 6.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE">Go to Step 9.

6.CHECK DTC.

Using the Subaru Select Monitor, read DTC of all the systems. Read Diagnostic Trouble Code (DTC)">

Is the body integrated data abnormal detected in several modules?

Replace the body integrated unit. Body Integrated Unit">

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE">Go to Step 7.

7.REPLACE MODULE.

1) Replace the body integrated unit.

2) Read the DTC using Subaru Select Monitor. Read Diagnostic Trouble Code (DTC)">

Is U0422 a current malfunction?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE">Go to Step 8.

System is normal.

8.CHECK MODULE.

1) Reinstall the body integrated unit.

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

3) Read the DTC using Subaru Select Monitor. Read Diagnostic Trouble Code (DTC)">

Is U0422 a current malfunction?

Replace the body integrated unit. Body Integrated Unit">

System is normal.

9.CHECK HARNESS.

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

2) Using the Subaru Select Monitor, read DTC of CAN system. Read Diagnostic Trouble Code (DTC)">

Is U0422 a current malfunction?

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

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE">Go to Step 10.

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 u0420 invalid data received from power steering control module

Dtc u0423 invalid data received from instrument panel cluster control module

Other materials:

Dtc p0685 ecm/pcm power relay control circuit/open
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC P0685 ECM/PCM POWER RELAY CONTROL CIRCUIT/OPENDTC DETECTING CONDITION:Detected when two consecutive driving cycles with fault occur.CAUTION:After servicing or replacing faulty parts, perform Clear Memory Mode ...

Removal
MANUAL TRANSMISSION AND DIFFERENTIAL(5MT) > Transfer Driven GearREMOVAL1. Remove the manual transmission assembly from the vehicle. Manual Transmission Assembly > REMOVAL">2. Remove the back-up light switch and the neutral position switch. Switches and Harness > REMOVAL">3 ...

Rear gate - if the rear gate cannot be opened
If the rear gate of your Subaru Ascent cannot be opened using the standard external button, it is possible to unlock it manually from inside the cargo area as an emergency measure. 1. Carefully remove the access panel located at the lower center of the rear gate trim. Use a flat-head scre ...