VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
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.
NOTE:
When parameter selection for VDCCM is improper, this DTC may be memorized.
STEP | CHECK | YES | NO |
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.
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