DTC P0780 [AW6AX-EL]

id0502j6802500

DTC P0780

Valve control solenoid circuit malfunction (valve stuck)

DETECTION CONDITION

•  Irregular shift control detected when following conditions are satisfied while driving:

Monitoring condition:

―  ATF temperature 65 °C {149 °F} or more

―  Engine running

―  Driving in D range

―  Counter drive gear (output) revolution speed 300 rpm or more (VSS)

Diagnostic support note:

•  This is a continuous monitor (CCM).

•  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

•  Shift solenoid A stuck

•  Shift solenoid B stuck

•  Shift solenoid C stuck

•  Shift solenoid D stuck

•  Shift solenoid E stuck

•  Shift solenoid F stuck

•  Line pressure control solenoid stuck

•  Control valve stuck

•  TCM malfunction

DTC P0780	Valve control solenoid circuit malfunction (valve stuck)
DETECTION CONDITION	• Irregular shift control detected when following conditions are satisfied while driving: Monitoring condition: ― ATF temperature 65 °C {149 °F} or more ― Engine running ― Driving in D range ― Counter drive gear (output) revolution speed 300 rpm or more (VSS) Diagnostic support note: • This is a continuous monitor (CCM). • 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	• Shift solenoid A stuck • Shift solenoid B stuck • Shift solenoid C stuck • Shift solenoid D stuck • Shift solenoid E stuck • Shift solenoid F stuck • Line pressure control solenoid stuck • Control valve stuck • 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.
1		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 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.
2		No	Go to the next step.
3	INSPECT SOLENOID VALVE • Inspect the solenoid valve. (See SOLENOID VALVE INSPECTION [AW6AX-EL].) • Is it normal?	Yes	Go to the next step.
3		No	Replace the control valve body, then go to the next step. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [AW6AX-EL].)
4	VERIFY TROUBLESHOOTING OF DTC P0780 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 the same DTC present?	Yes	Replace the TCM, then go to the next step. (SeeTCM REMOVAL/INSTALLATION [AW6AX-EL].)
4		No	Go to the next step.
5	VERIFY AFTER REPAIR PROCEDURE • Perform the “After Repair Procedure”. (See AFTER REPAIR PROCEDURE [AW6AX-EL].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [AW6AX-EL].)
5		No	DTC troubleshooting completed.