Rio5 L4-1.6L (2006)
Engine Control Module: All Technical Service Bulletins
Engine Controls - Rough Idle/MIL ON/Multiple DTC's
GROUP ENGINE
NUMBER 033 [REVISED 2]
MODEL 06-08MY RIO/RIO 5 (JB)
DATE MARCH 2010
SUBJECT:
ECM UPGRADE FOR MULTIPLE DTC'S LISTED (P0300, P0128, P0140, P0442, P0451, P0461) DTC LOGIC IMPROVEMENT
UPDATES ARE SHOWN WITH BLACK BARS AND/OR ASTERISKS.
*This bulletin provides the procedure to upgrade the Engine Control Module (ECM) of some 2006~2008 RIO/RIO5 (JB) 1.6L vehicles produced Sep.
27, 2006 to June 31, 2008 which may experience a rough idle during initial cold start-up period and/or illuminate the MIL with DTC's below. The ECM
update addresses engine roughness/misfire that may occur in the first minute of idle after cold start with coolant temperature ranging from 30-70°F and
other indicated upgrades referenced below. If the engine misfire continues beyond this period refer to service manual diagnostic procedures involving
engine mechanical and engine control hardware issues. For confirmation that the latest reflash has been done to a vehicle you are working on, verify
ROM ID using the tables in this TSB. This TSB supercedes all previous Rio Mis-fire P0300 publications except SA032. Please discard any paper copies
printed prior to March 2010 to ensure correct ROM ID is installed.*
^ P0300: Random/multiple Cylinder Misfire Detected and/or rough idle state (2006~2009)
^ P0128: Thermostat Monitoring (2006~2008 MY)
^ P0140: O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2, stored in memory [2006~2009])
^ P0442: Evaporative Emission System - Leak detected (2006~2009)
^ P0451: Evaporative Emission System Pressure Sensor/Switch Range Performance (2006~2009)
^ P0461 or P0422: Fuel Level Sensor "A" Circuit Range/Performance (2006~2009)
To correct this condition, the ECM should be reprogrammed using the GDS download as described in this bulletin.
NOTICE
NOTICE
^ A fully charged battery is necessary before ECU upgrade can take place. DO NOT connect a battery charger to the vehicle during ECU upgrade.
Make sure the blower motor is "OFF" during ECU upgrade.
