A/T Controls - MIL ON/Failsafe Mode/Multiple DTC's Set

Group:
TRANSAXLE

Number:
05-40-006-1

Date:
August, 2005

Models:
1999 - Sonata
2001 - Elantra, Santa FE & XG,
2003 - Tiburon
2005 - Tucson

Subject:
ATA SOLENOID DIAGNOSTIC CODES P0740, P0741, P0742, P0743, P0746, P0748, P0750, P0755, P0760, P0765, P0770

This TSB supersedes TSB # 05-40-006 to include DTC descriptions in Step 10.

DESCRIPTION:

Incorrect operation of the transaxle solenoids may result in the following three symptoms:

1. Check Engine Light illuminated

2. Transaxle held in 3rd gear "Fail-safe"

3. Diagnostic Trouble Codes P0740, P0741, P0742, P0743, P0746, P0748, P0750, P0755, P0760, P0765 or P0770 set.

NOTE:
Do NOT replace the transaxle for solenoid codes listed as open/short. Instead, follow the repair procedure shown below.

REPAIR PROCEDURE:

1. Using a Hi-Scan Pro, check for DTC in both the "Engine" and "Automatic Transaxle" menus. Record the DTC and description.

2. From the Hi-Scan Pro, select:

^ "Hyundai Diagnosis" menu
^ "Vehicle
^ "Auto Transaxle" menu
^ "Actuation Test"





^ Press the F1 button (STRI) and test the LR, UD, 2ND, OD, DCC and FSV solenoid (if applicable). Monitor the Hi-Scan and listen for a solenoid sound from the engine compartment.

^ If Hi-Scan shows:

^ "TEST FAILURE" and no solenoid sound is heard, go to Step 3.

^ "COMPLETED" and solenoid sound is heard, the wiring between the PCM/TCM has no open or short circuits. Go to Step 5.

NOTE:
This test confirms only that the wiring harness does not currently have an open or short circuit. It does not confirm the proper functioning of the solenoids under all conditions of heat and vibration or a solenoid with an internal intermittent open/short condition.

3. Visually check the wiring harness between the TCM and transaxle for a damaged wire or a short circuit to ground. Disconnect the connectors to the solenoids at the transaxle and the PCM/TCM and check for a bent pin or a pin not fully inserted into the connector. If so, repair or replace the ECM control harness, P/N 914XX-XXXXX.








4. Check the harness inside the transaxle oil pan for a short circuit to ground. Replace the harness if damage is found or if three or more solenoid DTCs are found in Step 1. (Refer to TSB # 04-40-015 for instructions).





5. Refer to the DTC recorded in Step 1 and follow the repair procedure shown.

SOLENOID REPLACEMENT:

6. Remove the battery.

7. Drain the radiator. Remove the lower radiator hose from the radiator.

8. Drain the ATF.

9. Remove the valve body cover from the transaxle.






10. Refer to the DTC recorded in Step 1 and replace the related solenoid according to the diagram shown. Tighten the bolts to 4-5 lb.ft (50-70 kg.cm). Go to Step 11.

NOTE:
^ P0743 - TCC solenoid open/short
^ P0746 - VFS solenoid performance
^ P0748 - VFS solenoid open/short
^ P0750 - LR solenoid open/short
^ P0755 - UD solenoid open/short
^ P0760 - 2nd solenoid open/short
^ P0765 - OD solenoid open/short
^ P0770 - RED solenoid open/short

11. Apply Permatex Ultra Gray Sealer or Hyundai Ultra Gray Gasket Sealer, P/N 00231-13800 to the valve body cover and reinstall the cover. Tighten the bolts to 6-7 lb.ft (80-100 kg.cm).

12. Add approximately five quarts of Hyundai SPIII ATF and check the level with the engine idling in Neutral. Recheck the ATF level when the ATF is at normal operating temperature (70-100°C, 159-212°F).





13. Clear the codes and test drive the vehicle for two driving cycles (two key-on to key-off driving cycles, including 1-2-3-4 upshifts and 4-3-2-1 downshifts). If the DTC returns, perform the repairs shown.





PARTS INFORMATION





WARRANTY INFORMATION