Subaru Crosstrek Service Manual: Dtc c0044 tcm communication circuit

DTC detecting condition:

No CAN signal from TCM.

Trouble symptom:

• ABS does not operate.

• VDC does not operate.

• EyeSight does not operate.

1.CHECK LAN SYSTEM.

Perform the diagnosis for LAN system. Basic Diagnostic Procedure">

Is there any fault in LAN system?

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

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C0044 TCM COMMUNICATION CIRCUIT">Go to Step 2.

2.CHECK POOR CONTACT OF CONNECTORS.

Is there poor contact of TCM connector?

Repair the connector.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C0044 TCM COMMUNICATION CIRCUIT">Go to Step 3.

3.CHECK TCM.

Refer to the basic diagnostic procedure for Transmission (diagnostics).

Is the check result OK?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C0044 TCM COMMUNICATION CIRCUIT">Go to Step 4.

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

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

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C0044 TCM COMMUNICATION CIRCUIT">Go to Step 5.

5.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 c0042 power supply voltage failure

Dtc c0047 can communication

Other materials:

Inspection
MANUAL TRANSMISSION AND DIFFERENTIAL(5MT) > Main Shaft AssemblyINSPECTIONDisassembled parts should be washed with cleaning solvent first, then inspected carefully.1. BearingReplace the bearings in the following cases.• When the bearing balls, outer races and inner races are broken or rusty. ...

Key lock cylinders Replacement
SECURITY AND LOCKS > Key Lock CylindersREPLACEMENT1. STEERING LOCK1. Disconnect the ground cable from battery. NOTE">2. Remove the cover assembly - column.(1) Remove the screws by turning the steering wheel to right and left.(2) Release the claw, and remove the cover assembly - column UP ...

Installation
CONTINUOUSLY VARIABLE TRANSMISSION(TR580) > Drive PlateINSTALLATION1. Temporarily install the drive plate and reinforcement drive plate.NOTE:Align the knock pin hole of the crankshaft position sensor plate to the knock pin of the crankshaft to secure the knock pin.2. Set the ST.ST 498497300CRA ...