Mazda CX-7 2007 Workshop Manual page 923

ON-BOARD DIAGNOSTIC [AW6A-EL, AW6AX-EL]
DTC P0780[AW6A-EL, AW6AX-EL]
DTC P0780 Valve control solenoid circuit malfunction (valve stuck)
• 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)
DETECTION
Diagnostic support note:
CONDITION
• 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.
• Shift solenoid A stuck
• Shift solenoid B stuck
• Shift solenoid C stuck
• Shift solenoid D stuck
POSSIBLE
• Shift solenoid E stuck
CAUSE
• Shift solenoid F stuck
• Line pressure control solenoid stuck
• Control valve stuck
• TCM malfunction
Diagnostic procedure
STEP
1 VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has the FREEZE FRAME DATA been
recorded?
2 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Verify related Service Bulletins and/or on-line
repair information availability.
• Is any related repair information available?
3 INSPECT SOLENOID VALVE
• Inspect the solenoid valve.
(See 05-17-20 SOLENOID VALVE
INSPECTION[AW6A-EL, AW6AX-EL].)
• Is it normal?
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 same DTC present?
5 VERIFY AFTER REPAIR PROCEDURE
• Perform the "After Repair Procedure".
(See 05-02-4 AFTER REPAIR
PROCEDURE[AW6A-EL, AW6AX-EL].)
• Are any DTCs present?
End Of Sie
INSPECTION
Yes Go to the next step.
No Record the FREEZE FRAME DATA on the repair order,
then go to the next step.
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.
Yes Go to the next step.
No Replace the control valve body, then go to the next step.
(See 05-17-38 CONTROL VALVE BODY REMOVAL/
INSTALLATION[AW6A-EL, AW6AX-EL].)
Yes Replace the TCM, then go to the next step.
(See 05-17-25 TCM REMOVAL/INSTALLATION[AW6A-EL,
AW6AX-EL].)
No Go to the next step.
Yes Go to the applicable DTC inspection.
(See 05-02-5 DTC TABLE[AW6A-EL, AW6AX-EL].)
No DTC troubleshooting completed.
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ACTION
05-02–35
05-02