Elantra L4-1595cc 1.6L DOHC (1993)
Transmission Temperature Sensor/Switch: All Technical Service Bulletins
A/T - Will Not Engage Overdrive
Group: TRANSAXLE
Number: 96-04-011
Date: JULY, 1996
Model: All w/AUTOMATIC TRANSAXLE
Subject
AUTOMATIC TRANSAXLE WILL NOT ENGAGE OVERDRIVE (4TH GEAR)
DESCRIPTION:
This bulletin describes three (3) possible conditions which can exist when a vehicle, equipped with an automatic transaxle, will not engage overdrive (4th
gear). The procedures listed below describe each of the conditions and the methods of diagnosing/repairing the vehicle.
DIAGNOSTIC PROCEDURES:
CONDITION 1:
Transaxle shifts properly through all other gears (1st, 2nd, 3rd) but slips in 4th gear:
DIAGNOSIS/REPAIR:
^
Disengage (turn-off) overdrive. If transaxle operates normally in 3rd gear proceed to the next step.
^
Road test the vehicle with the Automatic Transaxle Tester, SST # J39853, connected. Using the manual gear selector, command shifts 1st, 2nd, 3rd
& 4th. If transaxle slips or fails to engage 4th gear, replace the end clutch.
^
If transaxle shifts normally through all gears and does not slip. check the wiring and/or Transmission Control Module.
CONDITION 2:
Transaxle shifts properly through all other gears (1st, 2nd, 3rd) but will not engage 4th gear (remains in 3rd):
DIAGNOSIS/REPAIR:
^
Connect HDS Scan Tool SST # J41490 and turn ignition switch to "On" position. Select appropriate vehicle then select "Transaxle". From the
"Codes and Data" menu, select "Data". Manually operate the overdrive switch and read "OD SW" on scan tool. If the overdrive switch is not
working properly, replace the switch.
^
If by replacing the overdrive switch the condition is not corrected, check the wiring and/or Transmission Control Module.
CONDITION 3:
While driving at a steady speed in 4th gear the vehicle downshifts to 3rd or 2nd gear:
DIAGNOSIS/REPAIR:
^
Test the oil temperature sensor as indicated in TSB #'s 96-40-001 or 96-40-009. If oil temperature sensor is not within specification, replace the
sensor.
^
If by replacing the oil temperature sensor the condition is not corrected, check the wiring and/or Transmission Control Module.
