A/T - Shift Solenoid Incorrect Operation/MIL ON

Group:
TRANSAXLE

Number:
00-40-009

Date:
AUGUST, 2000

Model:
ALL

Subject:
AUTOMATIC TRANSAXLE SOLENOID DIAGNOSTIC TROUBLE CODES

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

^ Erratic shift

^ Transaxle held in 3rd gear Fail-Safe

^ Diagnostic Trouble Codes (see list in "DTC Information")

^ MIL illuminated

NOTE:
Do NOT replace the transaxle for solenoid codes listed as "Electrical Condition" in the "DTC Information" section of this bulletin. Instead, follow the repair procedure shown below.

REPAIR PROCEDURE:

1. Using a Hi-Scan Pro, select: "Hyundai Vehicle Diagnosis" menu, "Automatic Transaxle" menu and "Diagnostic Trouble Codes". Repeat the procedure and select "Engine" menu and "Diagnostic Trouble Codes". Record the DTC and description.

NOTE:
Steps 2-5 are only for Elantra/Tiburon prior to 2001 MY and all Accents. For other models, go to Step 6:

2. Clean the connection between the battery cables and the battery posts.





3. Clean the connection between the negative battery cable and the transaxle case. Reinstall the cable.

NOTE:
This procedure is necessary because the solenoids ground through the transaxle case and negative battery cable.





4. Clean the connection between the negative battery cable and the body ground bolt located next to the battery. Apply conductive grease to the connection before reinstalling the bolt.

NOTE:
This procedure is necessary because the TCM grounds through this body ground.

5. Measure voltage drop:

^ Start the engine and turn on the headlights.

^ Use a digital voltmeter to measure the voltage drop between the negative battery terminal and the ground locations in Steps 3 and 4 (use VDC setting). If the voltage drop is:

More than 0.1 volts: Replace the negative battery cable

Less than 0.1 volts: Go to Step 6

All models:

6. Disconnect the connectors between the solenoid and TCM. Check for bent pins or pins not fully inserted in the connector. Repair as necessary.

NOTE:
Clean connector pins with a contact cleaner listed below, or equivalent:

^ NAPA Electronic Cleaner, P/N 765-1843

^ MOPAR MP-50 Electrical Contact Cleaner, P/N 04549626

^ Permatex Electrical Contact Cleaner, P/N 24379 or equivalent.

7. Check the wiring harness in the engine compartment and inside the transmission oil pan for a damaged wire or a short circuit to ground.

8. Measure the resistance of the harness wires between the solenoid connector and TCM connector. Refer to the appropriate ETM to find the correct pin terminals. If the resistance is:

^ More than 1 ohm: Repair the harness

^ Less than 1 ohm: Go to Step 9.

9. Refer to the DTC recorded in Step 1. If the DTC was:

^ Solenoid DTC, except P0740 or 49: Replace the related solenoid or solenoid assembly

^ DTC P0740 or 49: Replace the transaxle.





NOTE:
For 1999-2001 Sonata or 2001 Elantra, XG or Santa Fe, refer to the Automatic Transaxle Overhaul Manual, Page 45D-51, to locate the related solenoid.

10. 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 return, replace the TCM.

DTC INFORMATION:
For your reference, the logic the TCM uses to set solenoid codes are listed.

DO NOT replace the transaxle for those codes listed as "Electrical Condition". Refer to the tables for additional information.





TCM DTC - 1999-01 SONATA, 2001 ELANTRA, XG & SANTA FE
2000-01 ACCENT, 1999-00 ELANTRA (produced after 6/1/99):





TCM DTC - 1996-99 ELANTRA/TIBURON (PRIOR TO 6/1/99), & 1996-99 ACCENT:





TCM DTC - PRE-OBDII: ELANTRA, TIBURON AND ACCENT PRIOR TO 1996, 1995-98 SONATA:





ECM DTC - (1995-98) SONATA):

NOTE:
Only the 1996-98 Sonata has an ECM DTC that indicates a transaxle condition. If you find P0750 in the ECM, check the "Automatic Transaxle" menu for additional DTC information.





WARRANTY INFORMATION