A/T - MIL ON/Failsafe Mode/Multiple Solenoid DTC's Set
Group TRANSAXLENumber 09-AT-018
Date OCTOBER, 2009
Model SEE APPLICABLE VEHICLES
Subject
ATA SOLENOID DIAGNOSTIC TROUBLE CODES P0740, P0741, P0742, P0743, P0746, P0748, P0750, P0755, P0760, P0765, P0770
This TSB supersedes TSB# 05-40-006 to change the test procedure (Step 5) and add additional models.
DESCRIPTION:
Incorrect operation of the transaxle solenoids may result in the following symptoms:
^ Check Engine Light illuminated
^ Transaxle held in 3rd gear Fail-Safe
^ 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.
APPLICABLE VEHICLES:
NOTE:
Refer to TSB 09-AT-011 for 2007~10 (HD) Elantra Sedan and (FD)
PARTS INFORMATION
REPAIR PROCEDURE:
1. Using a GDS, check for DTC in both the "Engine" and "Automatic Transaxle" menus. Record the DTC and description.
2. From the GDS, select:
^ Vehicle
^ "Auto Transaxle" menu
^ "Actuation Test"
^ Press the "Start" button and listen for a solenoid sound and "Success" indication.
^ If the test result is:
^ Fail: go to Step 3
^ Success: the wiring between the PCM/TCM currently has no open or short circuits. Go to Step 4.
NOTE:
This test confirms the wiring harness currently does not 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 intermittent open/short condition.
3. If Step 2 shows an inoperative solenoid, 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 DTC are found in Step 1. (Refer to TSB#04-40-015 for replacement instructions).
5. Refer to the DTC recorded in Step 1 and follow the repair procedure shown below:
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.
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. Reinstall the radiator hoses and add ethylene glycol coolant to the radiator and overflow bottle. Adjust the level according to the appropriate shop manual, "EM" section.
13. Add approximately five quarts of Hyundai SPIII ATF and check the level with the engine idling in Neutral. Refer to TSB 06-40-016 and adjust the ATF level when the ATF is at normal operating temperature (70-80°C, 158-176°F).
14. 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 above.
WARRANTY INFORMATION