Subaru Crosstrek Service Manual: Dtc c1423 different ecu specifications

DTC detecting condition:

Different control module specification

Trouble symptom:

• ABS does not operate.

• VDC does not operate.

• Hill start assist does not operate.

When parameter selection for VDCCM is improper, this DTC may be memorized.

1.CHECK VDCCM&H/U IDENTIFICATION SYMBOL.

Check the identification symbol attached on the H/U. General Description > SPECIFICATION">

Is the identification symbol correct?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1423 DIFFERENT ECU SPECIFICATIONS">Go to Step 2.

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

2.CHECK PARAMETER SELECTED IN VDCCM.

Subaru Select Monitor > OPERATION">

Does the parameter registered in the VDCCM match the relevant vehicle?

CVT model: Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1423 DIFFERENT ECU SPECIFICATIONS">Go to Step 3.
MT model: Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1423 DIFFERENT ECU SPECIFICATIONS">Go to Step 5.

Select and register the correct parameter. Subaru Select Monitor > OPERATION">

3.CHECK TCM SPECIFICATION.

Check the TCM specification.

Is the specification of TCM same as vehicle specification?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1423 DIFFERENT ECU SPECIFICATIONS">Go to Step 4.

Replace the TCM. Transmission Control Module (TCM)">

4.CHECK CVT SYSTEM.

1) Start the engine.

2) Read the DTC of the CVT system. Read Diagnostic Trouble Code (DTC)">

Is DTC of CVT system displayed?

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

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1423 DIFFERENT ECU SPECIFICATIONS">Go to Step 5.

5.CHECK ECM SPECIFICATION.

Check the ECM specification.

Is the specification of ECM same as vehicle specification?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1423 DIFFERENT ECU SPECIFICATIONS">Go to Step 6.

Replace the ECM. Engine Control Module (ECM)">

6.CHECK ENGINE SYSTEM.

1) Start the engine.

2) Read DTC of the engine system. Read Diagnostic Trouble Code (DTC)">

Is engine system DTC displayed?

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

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1423 DIFFERENT ECU SPECIFICATIONS">Go to Step 7.

7.CHECK VDCCM&H/U.

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

2) Perform the Inspection Mode. Inspection Mode">

3) 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 C1423 DIFFERENT ECU SPECIFICATIONS">Go to Step 8.

8.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 c1432 different ecu specifications

Dtc c1731 g sensor abnormal

Other materials:

Installation
FUEL INJECTION (FUEL SYSTEMS)(H4DO) > Fuel Level SensorINSTALLATIONInstall in the reverse order of removal.CAUTION:Be sure to install the fuel level sensor harness to the clip first, then install the connector cable. Otherwise, malfunction may occur.(A)Fuel level sensor harness(B)Connector cable ...

Removal
MANUAL TRANSMISSION AND DIFFERENTIAL(5MT) > Shifter Fork and RodREMOVAL1. 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 ...

Inspection mode Operation
Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Inspection ModeOPERATIONIt is possible to diagnose the DTC by performing the indicated inspection mode. After correcting the DTC, perform a necessary inspection mode and make sure that the function is resumed correctly and the DTC is r ...