DTC P0974 [AW6A-EL, AW6AX-EL]

id050211803500

DTC P0974

Shift solenoid A circuit malfunction (short to power/open circuit)
DETECTION CONDITION
•  Open or short circuit in shift solenoid A signal system (The solenoid remains on continuously for 100 ms or more even if the TCM sends a solenoid off command).
Diagnostic support note:
•  This is continuous monitor (CCM).
•  The MIL illuminates if the TCM detects the above malfunction condition during first drive cycle.
•  A PENDING CODE is not available.
•  FREEZE FRAME DATA is available.
•  The AT warning light illuminates.
•  The DTC is stored in the TCM memory.
POSSIBLE CAUSE
•  Coupler component connector or terminal malfunction
•  Short to power supply in wiring harness between shift solenoid A terminal A and TCM terminal B5
•  Shift solenoid A connector or terminal malfunction
•  Shift solenoid A malfunction
•  Open circuit between shift solenoid A terminal A and TCM terminal B5
•  TCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has the FREEZE FRAME DATA been recorded on the repair order?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
•  Verify related repair 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.
3
INSPECT COUPLER COMPONENT CONNECTOR FOR POOR CONNECTION
•  Turn the ignition switch to the LOCK position.
•  Remove the TCM.
•  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.
4
INSPECT SHIFT SOLENOID A CIRCUIT FOR SHORT TO POWER SUPPLY
•  Turn the ignition switch to the LOCK position.
•  Inspect for continuity between coupler component terminal B5 (wiring harness-side) and all terminals except B5 (wiring harness-side).
•  Is there continuity?
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 SHIFT SOLENOID A CONNECTOR FOR POOR CONNECTION
•  Turn the ignition switch to the LOCK position.
•  Disconnect the shift solenoid A 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.
6
INSPECT SHIFT SOLENOID A
•  Inspect the shift solenoid A.
•  Is there any malfunction?
Yes
Replace the shift solenoid A, then go to Sep 8.
(See CONTROL VALVE BODY REMOVAL/INSTALLATION [AW6A-EL, AW6AX-EL].)
No
Go to the next step.
7
INSPECT SHIFT SOLENOID A CIRCUIT FOR OPEN CIRCUIT
•  Turn the ignition switch to the LOCK position.
•  Inspect for continuity between shift solenoid A terminal A (wiring harness-side) and coupler component terminal B5 (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 next step.
8
VERIFY TROUBLESHOOTING OF DTC P0974 COMPLETED
•  Make sure to reconnect all the disconnected connectors.
•  Clear the DTC from the memory using the M-MDS.
•  Drive the vehicle in D range and make sure that gears shift smoothly from 1GR to 6GR.
•  Is same DTC present?
Yes
Replace the TCM, then go to the next step.
(See TCM REMOVAL/INSTALLATION [AW6A-EL, AW6AX-EL].)
No
Go to the next step.
9
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “After Repair Procedure”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [AW6A-EL, AW6AX-EL].)
No
DTC troubleshooting completed.