Engine - Poor Acceleration After Cold Start: Overview
Group: ENGINE ELECTRICALNumber: 02-36-018
Date: JUNE, 2002
Model: 2000-2001 ACCENT
Subject
2000-2001 ACCENT ECM REPROGRAMMING
TO IMPROVE ACCELERATION AFTER
AN INITIAL COLD START
DESCRIPTION:
Certain 2000-2001 Accent vehicles with 1.5L SOHC and 1.6L DOHC engines may experience the following symptoms:
^ Slower than usual acceleration after an initial cold start.
^ Excessive rpm drop when engaging reverse (on ATM equipped vehicles) after an initial cold start.
^ The condition occurs only in the summer (hot and humid weather conditions).
The ECM program has been revised to increase engine torque during cold starts to improve acceleration.
The following procedure describes updating the ECM software, using the Hi-Scan Pro.
NOTE:
Item "13. LC 00-01 MY ACCELERATION" displayed on the first screen of the Hi-Scan Pro during reprogramming includes the previous item "07. LC 1.5S ACCELERATION" and thus applies to all 2000-2001 model ACCENT vehicles.
VEHICLES AFFECTED:
^ Model: 2000-2001 ACCENT vehicles with 1.5L SOHC and 1.6L DOHC engines
^ Affected vehicle production date range and VIN range shown.
ECM SPECIFICATION TABLE:
CAUTIONS BEFORE REPROGRAMMING:
1. Conduct reprogramming with the ignition key in the "ON" position.
2. Be careful not to disconnect any cables connected to the vehicle or Hi-Scan Pro during reprogramming.
WARNING:
If reprogramming is interrupted, the manual update procedure must be used.
3. Do not start the engine during reprogramming.
4. Do not turn the ignition key off during reprogramming.
5. When the reprogramming is completed, turn off the ignition key for 20 seconds before starting the engine.
REPROGRAMMING PROCEDURE:
NOTE:
Verify that the vehicle is affected by identifying the vehicle production date and VIN.
EXPLANATION OF ERROR MESSAGE:
1. "INVALID PASSWORD": Please enter the correct password again.
2. "REPROGRAMMING ERROR PLEASE WAIT FOR RETRY": An error occurred during reprogramming, the Hi-Scan Pro will retry the reprogramming automatically.
3. "ALREADY REPROGRAMMED" or "INCORRECT TARGET ID": The reprogramming has previously been done on this vehicle or the ECM is not the type subject for this reprogramming procedure.
4. "REPROGRAM ERROR PLEASE CHECK THE SYSTEM": In this case you must reprogram manually after selecting the menu option "02. IC 00-01 MY ACCELERATION (ERROR MODE]".
WARRANTY INFORMATION:
Submit claim using warranty screen.