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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
CONTROL SYSTEMS > AT Shift Lock Solenoid and “P” Range SwitchREMOVAL1. SOLENOID UNIT1. Remove the AT select lever. Select Lever > REMOVAL">2. Remove the spacer and gasket. Select Lever > DISASSEMBLY">3. Using a flat tip screwdriver with a thin tip, remove the h ...

Caution
CLUTCH SYSTEM > General DescriptionCAUTION• Remove contamination including dirt and corrosion before removal, installation or disassembly.• Keep the disassembled parts in order and protect them from dust and dirt.• Before removal, installation or disassembly, be sure to clarify ...

List of diagnostic trouble code (dtc) List
Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > List of Diagnostic Trouble Code (DTC)LISTDTCItemReferenceB2300REAR RADAR CIRCUIT LOW Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2300 REAR RADAR CIRCUIT LOW">B2301REAR RADAR CIRCUIT HIGH Diagnostic Procedu ...

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