DTC P0780:00 [TCM (ET6A-EL, ET6AX-EL) (E)]
id0502q98245r2
Outline
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System malfunction location |
Gear shifting malfunction |
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Detection condition
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• Gear ratio malfunction while in any gear 1st to 6th or clutch-slip DTC (P0729:00, P0731:00, P0732:00, P0733:00, P0734:00, P0735:00, P1728:00) occurs and vehicle is driven under gear ratio malfunction condition from fail-safe, or use of gear speeds in which clutch slip occurs is restricted.
• Determined that vehicle may be in danger due to clutch not engaging by TCM direction according to signal from the oil pressure switch.
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Fail-safe
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• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
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Possible cause
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• ATF is less than specified value
• On/off solenoid malfunction
• Pressure control solenoid malfunction
• Shift solenoid malfunction
• Oil pressure switch circuit malfunction
• Oil pressure switch malfunction
• Clutch slippage
• ATF leakage from clutch circuit
• Control valve body malfunction
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System wiring diagram
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• Not applicable
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Connector diagram
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• Not applicable
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Diagnostic Procedure
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Step |
Inspection |
Results |
Action |
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1
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VERIFY DTC OUTPUT STATUS
• Are any the following DTCs displayed?
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Yes
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Go to the applicable DTC inspection.
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No
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Go to the next step.
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2
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INSPECT ATF LEVEL
• Inspect the ATF level.
• Is there any malfunction?
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Yes
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Adjust the ATF level to the specification, then go to repair completion verification.
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No
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Go to the next step.
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Repair completion verification
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PERFORM ON-BOARD DIAGNOSTIC TEST TO SPECIFY MALFUNCTIONING PART
• Perform the on-board diagnostic test.
• Are any DTCs present?
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Yes
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Repair the malfunctioning location according to the applicable DTC troubleshooting.
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No
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ATF amount in Step 2 is correct:
• Replace the oil pressure switch A and oil pressure switch B.
ATF amount adjusted in Step 2:
• Drive the vehicle to check it, and if there is no problem then the DTC troubleshooting is complete.
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