DTC P0743:00 [DJVA-EL]

id0502l1822200

DTC P0743:00

TCC solenoid short to GND
DETECTION CONDITION
•  Condition: TCC solenoid signal not operating while TCM is normal
•  Status: Detects short to GND in TCC solenoid system
•  Period: Confirmed 1 time in 0.5 s or more
Diagnostic support note
•  The AT warning light illuminates if the TCM detects the above malfunction condition during the first drive cycle.
•  PENDING CODE is not available.
•  The DTC is stored in the TCM memory.
POSSIBLE CAUSE
•  Coupler component connector or terminal malfunction
•  Short to GND in wiring harness for coupler component terminal J and TCM terminal A16
•  Short to power supply in wiring harness for coupler component terminal J and TCM terminal A16
•  TCM conneCtor or terminal malfunction
•  Open circuit in wiring harness for coupler component terminal J and TCM terminal A16
•  TCC Solenoid malfunction
•  TCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
•  Verify related service information availability.
•  Is any related repair information available?
Yes
Perform repair or diagnosis according to the available repair information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
2
INSPECT COUPLER COMPONENT CONNECTOR FOR POOR CONNECTION
•  Switch the ignition to OFF.
•  Disconnect the coupler component connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion)
•  Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 8.
No
Go to the next step.
3
INSPECT TCC SOLENOID CIRCUIT FOR SHORT TO GND
•  Switch the ignition to OFF.
•  Inspect for continuity between the coupler component terminal J (wiring harness-side) and body GND.
•  Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to GND, then go to Step 8.
No
Go to the next step.
4
INSPECT TCC SOLENOID CIRCUIT FOR SHORT TO POWER SUPPLY
•  Switch the ignition to ON (Engine off).
•  Measure the voltage between the coupler component terminal J (wiring harness-side) and body GND.
•  Is the voltage B+?
Yes
Repair or replace the wiring harness for a possible short to power supply, then go to Step 8.
No
Go to the next step.
5
INSPECT TCM CONNECTOR FOR POOR CONNECTION
•  Switch the ignition to OFF.
•  Disconnect the TCM connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion)
•  Is there any malfunction?
Yes
Repair or replace the terminal, then go to the Step 8.
No
Go to the next step.
6
INSPECT TCC SOLENOID CIRCUIT FOR OPEN CIRCUIT
•  Switch the ignition to OFF.
•  Inspect for continuity between the coupler component terminal J (wiring harness-side) and TCM terminal A16 (wiring harness-side)
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to the Step 8.
7
INSPECT TCC SOLENOID
•  Inspect the TCC solenoid.
•  Is there any malfunction?
Yes
Perform the following procedure, then go to next step.
1.  Replace the CVT.
2.  Perform oil pressure sensor learning.
No
Go to the next step.
8
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Make sure to reconnect all the disconnected connectors.
•  Clear the DTC using the M-MDS.
•  Perform the following procedure to ensure that the DTC has been resolved:
1.  Start the engine.
2.  Neutral control implemented.
•  Is the same DTC present?
Yes
Perform the following procedure, then go to next step.
1.  Replace the TCM.
2.  Perform TCM learning.
No
Go to the next step.
9
VERIFY NO DTCs ARE PRESENT
•  Perform the “Reading DTCs Procedure”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [DJVA-EL].)
No
DTC troubleshooting completed.