Engine Controls - MIL ON/DTCs P0638/P2135

Model: Sorento [BL], Rondo [UN], Optima [MG], Sedona [VQ], Amanti [GH]

Group: Fuel System(14)

Number: KT2009042201

Date: Wednesday, November 11, 2009

Area: N. America

Subject
ECU Upgrade - With TP Sensor Replacement - MIL On
with DTC P2135/P0638 (Engine - 044 - Revised)

- Description

This bulletin provides information related to the ECM software and TP sensor upgrade on some Sedona (VQ), Sorento (BL) and Amanti (GH) with Delphi EMS, Optima (MG) and Rondo (UN) with 2.7L engines which may experience a Malfunction Indicator Lamp (MIL) illuminated with the Electronic Throttle Control (ETC) system-related DTC P2135 or P0638 or P2A00 or P2A03. Throttle body removal is not required to perform TP sensor replacement. The vehicle must have been produced prior to 4/1/2009.

^ P2135: Throttle Position Sensor 1/2 Voltage Correlation

^ P0638: Throttle Actuator Control Range / Performance

^ P2A00 or P2A03: Oxygen Sensor Related on 2.7L engine

These vehicles may set P1295 and/or P2106 as these are Forced Limited Power and Power Management DTC's. The main symptom of this condition is that the engine idles at a very low rate.

The ECM upgrade can improve DTC P0116 for vehicles equipped with block heater, catalyst damage related P0429, P0430 and P0300~306 (Due to poor fuel quality), oxygen sensor related DTC on Rondo (UN) equipped with 2.7L engine.








To correct this condition, the ECM should be reprogrammed using the GDS download as described in this bulletin, and the TP Sensor replaced.





Some ECM configurations will require VIN writing and/or key teaching will be necessary.

- Effective Vehicle Information

AFFECTED PRODUCTION RANGE:

(Vehicles produced prior to 4/1/2009)

2006~2009 Sedona (VQ) with 3.8L engine equipped with PCM

2007~2009 Sorento (BL) with 3.3L and 3.8L engines equipped with ECM & TCM

2007~2009 Amanti (GH) with 3.8L engine equipped with PCM

2006.5 Optima (MG) with 2.7L engine equipped with PCM

2007 Rondo (UN) with 2.7L engine equipped with PCM

- Parts Information





PARTS INFORMATION

- Service Procedure





1. Open hood and remove the engine cover if necessary.

2. Disconnect the TP sensor electrical connector.





3. Remove the three (3) torx mounting screws (T-20).





4. Remove the TP sensor from the ETC actuator.

Installation Procedure:





1. Lubricate the O-ring on the TP sensor and align the mating hole on
the throttle shaft while aligning the electrical terminals.








2. Install the new TP sensor to the ETC actuator and tighten the Torx T-20 screws hand tight only. Use Loctite(R) Threadlocker Green 290 on screws during assembly.

3. Install the electrical connector to the TP sensor.

4. Install engine cover if removed.

5. Proceed to the reflash instructions.

6. Road test when complete to ensure proper installation of the TP sensor and base setting of transaxle adaptive reset since reflash of PCM was performed. This only applies to vehicles with PCM, vehicles with ECM and TCM do not require transaxle adaptive learning.




















ECM ROM TABLE INFORMATION:





1. Connect the power supply cable to the GDS tool.





2. Connect the USB cable between the VCI and the GDS tool.

3. Connect the Main 16-pin DLC cable (GHDM - 241000) to the VCI.





4. Connect the Main 16-pin DLC cable (GHDM - 241000) to the OBD-II
connector, located under the driver's side of the instrument panel.





5. With the ignition key ON, turn ON the VCI and GDS tool. Access the GDS vehicle identification number (VIN) screen and configure the vehicle using the VIN AUTO DETECT Function.





6. Once back at the GDS Main Screen, select ECM upgrade from the bottom right-hand corner. Next select Auto Mode, Engine.
Perform the ECM upgrade in accordance with normal GDS tool ECM upgrade procedures.





MANUAL MODE ECM UPGRADE PASSWORDS:

7. When the GDS tool reports that the ECU upgrade has been successfully completed, click OK, turn OFF the ignition key, and wait at least 10 seconds before attempting to start the engine.

8. Check for Diagnostic Trouble Codes using the GDS and erase any DTCs stored in the Engine and Transaxle control modules.

9. Road test when complete to ensure proper installation of the TP sensor and base setting of transaxle adaptive reset since reflash of PCM was performed. This only applies to vehicles with PCM, vehicles with ECM and TCM do not require transaxle adaptive learning.





WARRANTY CLAIM INFORMATION: