Code No. P0729, P0732, P0733, P0734, P0735: 6th, 2nd, 3rd, 4th, 5th Gear Ratio




DIAGNOSIS CODE SET CONDITIONS <DIAGNOSIS CODE P0729>


After 6th gear is achieved for 2 seconds, the engine runup*1 is detected for 250 milliseconds.

DIAGNOSIS CODE SET CONDITIONS <DIAGNOSIS CODE P0732>


After 2nd gear is achieved for 2 seconds, the engine runup*1 is detected for 250 milliseconds.

DIAGNOSIS CODE SET CONDITIONS <DIAGNOSIS CODE P0733>


After 3rd gear is achieved for 2 seconds, the engine runup*1 is detected for 250 milliseconds.

DIAGNOSIS CODE SET CONDITIONS <DIAGNOSIS CODE P0734>


After 4th gear is achieved for 2 seconds, the engine runup*1 is detected for 250 milliseconds.

DIAGNOSIS CODE SET CONDITIONS <DIAGNOSIS CODE P0735>


After 5th gear is achieved for 2 seconds, the engine runup*1 is detected for 250 milliseconds.
note *1 The actual gear ratio deviates from the target gear ratio to the high engine (turbine) speed.

PROBABLE CAUSES




DIAGNOSIS PROCEDURE


STEP 1. Check the diagnosis code.


Check that P0715 (input shaft speed sensor) and P0720 (output shaft speed sensor) are set.

Q. Is the diagnosis code set?

Check and repair the relevant diagnosis code system.
Go to Step 2.

STEP 2. Check the diagnosis code.


Check that the diagnosis code other than P0729, P0732, P0733, P0734, P0735 (6th, 2nd, 3rd, 4th, 5th gear ratio) is set.

Q. Is the diagnosis code set?

Check and repair the relevant diagnosis code system.
Go to Step 3.

STEP 3. Check the A/T fluid properties.


Check the status of the A/T fluid properties (smell, colour, fouling).

  • Black: A/T inside damage, seizure
  • Milky: Water intrusion

Q. Is the check result normal?

Go to Step 4.
Remove the A/T from the vehicle, then check and repair the inside.

STEP 4. Check the A/T fluid level.


Q. Is the check result normal?

Adjust the A/T fluid level, and then go to Step 5.
Go to Step 5.

STEP 5. Check the signals of input shaft speed sensor and output shaft speed sensor.


Check the signals of A/T-ECU connector PGA1, PGB1 terminal.
Refer to .

Q. Is the check result normal?

Go to Step 6.
Repair or replace the failure section.

STEP 6. Hydraulic pressure test


Refer to .

Q. Is the check result normal?

Go to Step 7.
Remove the A/T from the vehicle, then check and repair the inside.

STEP 7. Erase the diagnosis code, and drive the vehicle for a while.


Check that the normal code is displayed.

Q. Is the check result normal?

The procedure is complete.
Return to Step 1.