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Either of diagnosis codes P1779, P1780, P1781, P1782, P1783 or P1784 is set, the input shaft speed sensor or output shaft speed sensor is defective.
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Q.
Are diagnosis codes P1766 (P0715) or P1767 (P0720) output?
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YES diagnosis code P1766 (P0715) is set : Refer to diagnosis code P1766 (P0715) input shaft speed sensor system .
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YES diagnosis code P1767 (P0720) is set : Refer to diagnosis code P1767 (P0720) output shaft speed sensor system .
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Either of diagnosis codes P1779, P1780, P1781, P1782, P1783 or P1784 is set, the corresponding solenoid valve is defective.
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Q.
Is either of diagnosis code P1773 (P0753), P1774 (P0758), P1775 (P0763), P1776 (P0768), P1777 (P0773) output?
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YES diagnosis code P1773 (P0753) is set : Refer to diagnosis code P1773 (P0753): Low-reverse solenoid valve system .
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YES diagnosis code P1774 (P0758) is set : Refer to diagnosis code P1774 (P0758): Underdrive solenoid valve system .
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YES diagnosis code P1775 (P0763) is set : Refer to diagnosis code P1775 (P0763): Second solenoid valve system .
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YES diagnosis code P1776 (P0768) is set : Refer to diagnosis code P1776 (P0768): Overdrive solenoid valve system .
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YES diagnosis code P1777 (P0773) is set : Refer to diagnosis code P1777 (P0773): Reduction solenoid valve system .
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Each hydraulic pressure of the elements below, which diagnosis codes indicate, should be within the standard value.
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- diagnosis code P1779: Underdrive clutch, low-reverse brake, reduction brake
- diagnosis code P1780: Underdrive clutch, second brake, reduction brake
- diagnosis code P1781: Underdrive clutch, overdrive clutch, reduction brake
- diagnosis code P1782: Underdrive clutch, overdrive clutch, direct clutch
- diagnosis code P1783: Overdrive clutch, direct clutch, second brake
- diagnosis code P1784: Reverse clutch, low-reverse brake, reduction brake
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OK: Refer to Hydraulic Pressure Test .
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Q.
Is the check result normal?
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NO some hydraulic pressures are abnormal : Go to Step 5.
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NO all hydraulic pressure are abnormal : Go to Step 4.
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(1)Adjust the line pressure (Refer to ).
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(2)Test drive the vehicle.
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(3)Check the diagnosis code.
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Q.
Is the diagnosis code set?
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The inspection is complete.
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(1)Check the mounting bolts for looseness, and the O-ring, solenoid valve and valve body for damage. Replace the valve body assembly if the damages are thought to be irreparable.
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(2)Test drive the vehicle.
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(3)Check the diagnosis code.
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Q.
Is the diagnosis code set?
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The inspection is complete.
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(1)Replace the engine-A/T-ECU.
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(2)Test drive the vehicle.
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(3)Check the diagnosis code.
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Q.
Is the diagnosis code set?
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The inspection is complete.
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(1)Check the following clutches or brakes according to the output diagnosis codes, replace if necessary.
- If diagnosis code P1779, P1780, P1781, P1782 are set individually or in a group, replace the underdrive clutch.
- If diagnosis code P1781, P1782, P1783 are set individually or in a group, replace the overdrive clutch.
- If diagnosis code P1784 is set, replace the reverse clutch.
- If diagnosis code P1779, P1784 are set individually or in a group, replace the low-reverse brake.
- If diagnosis code P1780, P1783 are set individually or in a group, replace the second brake.
- If diagnosis code P1782, P1783 are set individually or in a group, replace the direct clutch.
- If diagnosis code P1779, P1780, P1781, P1784 are set individually or in a group, replace the reduction brake.
- If diagnosis code P1779 is set, replace the one-way clutch (OWC-L).
- If diagnosis code P1779, P1780, P1781 are set individually or in a group, replace the one-way clutch (OWC-D).
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(2)Test drive the vehicle.
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(3)Check the diagnosis code.
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Q.
Is the diagnosis code set?
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Eliminate the cause of the noise.
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The inspection is complete.
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