Subaru Crosstrek manuals

Subaru Crosstrek Service Manual: Dtc c1421 ecm control system

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC C1421 ECM CONTROL SYSTEM

DTC detecting condition:

ECM malfunctioning

Trouble symptom:

ABS does not operate.

VDC does not operate.

Hill start assist does not operate.

STEPCHECKYESNO

1.CHECK COOPERATION CONTROL FEASIBILITY OF ECM USING SUBARU SELECT MONITOR.

1) Start the engine, and run the engine at idle approximately 5 minutes.

2) Using the Subaru Select Monitor, select “Data monitor”. Subaru Select Monitor > OPERATION">

3) Check the «E/G Control Stop Flag» displayed on screen.

Is the «E/G Control Stop Flag» “1”?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1421 ECM CONTROL SYSTEM">Go to Step 4.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1421 ECM CONTROL SYSTEM">Go to Step 2.

2.CHECK WARNING LIGHT.

Check whether the VDC warning light illuminates after driving for 1 minute or more at a speed of 10 km/h (6 MPH) or more.

Does the VDC warning light illuminate?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1421 ECM CONTROL SYSTEM">Go to Step 3.

VDC is normal. Perform the Clear Memory Mode. Clear Memory Mode">

NOTE:

DTC may be recorded if cranking is performed during driving.

3.CHECK POOR CONTACT OF CONNECTORS.

Is there poor contact of ECM connector?

Repair the connector.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1421 ECM CONTROL SYSTEM">Go to Step 4.

4.CHECK DTC OF ECM.

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

Are any DTCs displayed?

Perform the diagnosis according to DTC. List of Diagnostic Trouble Code (DTC)">

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1421 ECM CONTROL SYSTEM">Go to Step 5.

5.CHECK VDCCM&H/U.

1) Connect all connectors.

2) Perform the Clear Memory Mode. Clear Memory Mode">

3) Perform the Inspection Mode. Inspection Mode">

4) Read the DTC. Read Diagnostic Trouble Code (DTC)">

Is the same DTC displayed?

Replace the VDCCM only. VDC Control Module and Hydraulic Control Unit (VDCCM&H/U) > REPLACEMENT">

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1421 ECM CONTROL SYSTEM">Go to Step 6.

6.CHECK DETECTION OF OTHER DTCS FOR VDC.

Read Diagnostic Trouble Code (DTC)">

Is any other DTC displayed?

Perform the diagnosis according to DTC. List of Diagnostic Trouble Code (DTC)">

Currently, it is normal. There may have been a temporary poor contact in the harness and connector or a temporary noise interference.

Dtc c1422 vdc interruption for engine convenience
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC C1422 VDC INTERRUPTION FOR ENGINE CONVENIENCEDTC DETECTING CONDITION:ECM prohibits the coop ...

Dtc c1562 reverse on fault
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC C1562 REVERSE ON FAULTDTC detecting condition:Abnormal reverse signalTrouble symptom:Hill s ...

Other materials:

Removal
GLASS/WINDOWS/MIRRORS > Outer Mirror AssemblyREMOVALRefer to “DISASSEMBLY” for removal procedures of scalp cap and mirror face. Outer Mirror Assembly > DISASSEMBLY">1. Disconnect the ground cable from battery and wait for at least 60 seconds before starting work. NOTE&quo ...

Dtc b1820 short in side airbag rh
AIRBAG SYSTEM (DIAGNOSTICS) > Diagnostic Chart with Trouble CodeDTC B1820 SHORT IN SIDE AIRBAG RHDiagnosis start condition:Ignition voltage is 10 V to 16 V.DTC detecting condition:• Side airbag harness (RH) circuit is shorted.• Side airbag module (RH) is faulty.• Airbag control ...

Disassembly
BRAKE > Front Disc Brake AssemblyDISASSEMBLYCAUTION:Be careful not to allow foreign matter to enter the brake hose connector.1. Remove mud and foreign matter from the caliper body.2. Remove the piston - disc brake.(1) Place a wooden block in the caliper body as shown in the figure to prevent the ...

© 2016-2025 Copyright www.sucross.com