Rio L4-1.5L (2001)
Control Module: All Technical Service Bulletins
A/T - MIL ON DTC P0740 Set
VOLUME
2
GROUP
Transmission/Driveline
NUMBER
005
MODEL
Rio
DATE
November 2000
SUBJECT:
TCM Logic Revision
This bulletin provides information related to a logic change in the Rio Transmission Control Module (TCM). On 2001 MY vehicles produced before
8/22/00, the TCM torque converter lock-up logic was over-sensitive, which under certain driving conditions could result in check engine light
illumination with a DTC of P0740.
TCMs in vehicles produced after 8/22/00 have revised torque converter lock-up logic to reduce incidence of related DTCs.
This revised TCM should be used to repair affected vehicles experiencing repeat check engine lights with above mentioned DTCs.
Note:
The part number of the revised TCM did not change. However, all TCMs in PDC stock have the revised logic. If in doubt of which TCM a vehicle
has, use the illustration for identification.
INSPECTION:
^
Open drivers door and check production date on FMVSS label.
^
If production date is 8/22/00 or later, correct part has already been installed during production - NO ACTION IS REQUIRED.
