Subaru Crosstrek Service Manual: 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.

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

Dtc c1562 reverse on fault

Other materials:

Dtc b2277 submerging circuit
KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC B2277 SUBMERGING CIRCUITDTC detecting condition:When the water-submersion detection circuit integrated into the keyless access CM detects the water submersion.Trouble symptom:&b ...

Installation
POWER ASSISTED SYSTEM (POWER STEERING) > Universal JointINSTALLATION1. Before installation, check the universal joint assembly - steering. Universal Joint > INSPECTION">2. Adjust the tilt position of the column assembly - steering to the neutral position and lock the tilt lever.3. Ali ...

Driving with a trailer
You should allow for considerably more stopping distance when towing a trailer. Avoid sudden braking because it may result in skidding or jackknifing and loss of control. Avoid abrupt starts and sudden accelerations. If your vehicle has a manual transmission, always start out in ...