A/T - Fail Safe Mode/Erratic/Hard Shifting/DTC's Set

Group
40 - TRANSAXLE

Number
03-40-022

Date
12-2003

Model
ACCENT 1996-2004,
ELANTRA 1996-2000 AND
TIBURON 1997-2001

Subject
AUTOMATIC TRANSAXLE PULSE GENERATOR DIAGNOSTIC TROUBLE CODES P0717 & P0722

This TSB supersedes TSB 01-40-006-1 to update the repair procedure.

DESCRIPTION:

An improperly functioning pulse generator on a 1996-2000 Elantra, 1997-2001 Tiburon or 1996-2004 Accent may result in the following conditions:

NOTE
These conditions may be intermittent and difficult to duplicate:
^ Diagnostic Trouble Codes:

^ P0717 - No pulse generator-A signal

^ P0722 - No pulse generator-B signal

^ P1624 - MIL-On request from TCM

^ Third-gear "Fail-Safe" condition and/or "Check Engine" light on

^ Harsh, delayed or erratic 1-2 upshift

^ Harsh or erratic 2-1 downshift during light acceleration Vehicle "bucking" and/or hesitation

REPAIR PROCEDURE:





1. Follow the procedure shown below according to vehicle and production dates shown.





2. Check for DTC in both the "Engine" and "Automatic Transaxle" menus. If you have the DTC, perform the repair procedure.





3. Clean both ends of the pulse generator connectors and the connectors to the TCM with aerosol electrical contact cleaner such as:

^ NAPA Electronic Cleaner, P/N 765-1843 or

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





4. Reconnect the pulse generator connector. For 1996-2000 MY Elantra vehicles only, remove the connector from the transaxle bracket. Leave the connector loose on the transaxle case to prevent any tension on the harness.

5. Test drive the vehicle for at least two key-on to key-off driving cycles (including 1-2-3-4 upshifts and 4-3-2-1 downshifts):

^ If P0722 recurs, go to Step 6.

^ If P0717 recurs, go to Step 7.





6. For 1996-2000 MY Elantra vehicles or 1996-2000 MY Accent vehicles, replace the reed switch on the speedometer. For 1997-2001 MY Tiburon vehicles, replace the vehicle speed sensor on the transaxle. Test drive the vehicle for at least two key-on to key-off driving cycles (including 1-2-3-4 upshifts and 4-3-2-1 downshifts):

^ If P0717 or P0722 recur, go to Step 7.

7. Replace the TCM. Test drive the vehicle for at least two key-on to key-off driving cycles (including 1-2-3-4 upshifts and 4-3-2-1 downshifts):

^ If P0717 or P0722 recur, go to Step 8.





8. Replace the wiring harness between the TCM and pulse generators.





PARTS INFORMATION





WARRANTY INFORMATION