DTC P2721 [SJ6A-EL]

id050208812000

DTC P2721

Shift solenoid G circuit malfunction (short to power)

DETECTION CONDITION

• Short circuit in shift solenoid G signal system (while TCM monitors solenoid output voltage, the voltage that differs from the signal output by CPU in TCM is detected).
Diagnostic support note:
• The MIL illuminates if the TCM detects the above malfunction condition during the 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

• Short to power in wiring harness between shift solenoid G terminal B and TCM terminal 1Y
• Short to power in wiring harness between shift solenoid G terminal A and TCM terminal 1L
• Shift solenoid G malfunction
• Damaged connector between shift solenoid G and TCM
• TCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has the FREEZE FRAME DATA been recorded?
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 Service Bulletins and/or on-line 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 TCM CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch to the LOCK position.
• Disconnect the TCM connector.
• Inspect for poor connection at TCM terminals 1Y and 1L (such as damaged/pulled-out pins, corrosion).
• Are terminals normal?
Yes
Go to the next step.
No
Repair or replace the connector and/or terminal, then go to Step 7.
4
INSPECT SHIFT SOLENOID G CIRCUIT FOR SHORT TO POWER SUPPLY
• Turn the ignition switch to the ON position (engine off).
• Measure the voltage at TCM (wiring harness-side) terminals 1Y and 1L.
• Is there 0 V at the TCM wiring harness-side connector terminals?
Yes
Go to go to Step 7.
No
Go to the next step.
5
INSPECT SHIFT SOLENOID G CIRCUIT FOR SHORT TO POWER SUPPLY
• Turn the ignition switch to the LOCK position.
• Disconnect the couple component connector.
• Turn the ignition switch to the ON position (engine off).
• Measure the voltage at TCM (wiring harness-side) terminals 1Y and 1L.
• Is there 0 V at the TCM wiring harness-side connector terminals?
Yes
Go to the next step.
No
Repair or replace the wiring harness (TCM-couple component connector) for short to power supply, then go to Step 7.
6
INSPECT SHIFT SOLENOID G
• Inspect the shift solenoid G.
• Is the shift solenoid G normal?
Yes
Repair or replace the wiring harness (couple component connector-shift solenoid G) for short to power supply, then go to the next step.
No
Replace the control valve body, then go to the next step.
7
VERIFY TROUBLESHOOTING OF DTC P2721 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.
No
Go to the next step.
8
VERIFY AFTER REPAIR PROCEDURE
• Perform the "After Repair Procedure".
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
Troubleshooting completed.