Engine Controls - Cold Engine Stumble/DTC P0116/MIL ON: Overview

Group
36 - ENGINE ELECTRICAL

Number
03-36-017

Date
09-2003

Model
Accent 2000-2002

Subject
2000-2002 1.5L AND 1.6L ACCENT COLD
STUMBLE AND 2002 1.6L ACCENT P0116 (ECT
OPERATION) ECM REPROGRAMMING

DESCRIPTION:

1. Some 2000-2002 Accents with 1.5L SOHC and 1.6L DOHC engines may experience the following symptoms in the summer (hot and humid weather):

^ Slower than usual acceleration after an initial cold start (engine is cold soaked).

^ Greater than usual rpm drop when engaging drive or reverse (on ATM equipped vehicles) afier an initial cold start.

2. Some 2002 1.6L Accents may turn on the "Check Engine" light and store the diagnostic trouble code P0116 (Engine Coolant Temperature Sensor Range/Performance Problem) in the ECM.
This code can be falsely set under certain driving conditions.
Check the Engine Coolant Temperature (ECT) sensor to make sure that it1s functioning properly. When the engine is cold soaked, the ECT and Intake Air Temperature should read approximately the same temperature. When the engine is fully warmed-up, the ECT should read about 190° F to 200° F (depending on the cooling fan cycle).
If the code has been set falsely, perform the ECM software reprogramming procedure using the Hi-Scan Pro as outlined below.

The ECM program has been revised to improve BOTH of the above described conditions.

The following procedure describes updating the ECM software, using the Hi-Scan Pro.

NOTE
This new reprogramming software (# 31) supersedes the previous reprograms for "Cold Stumble" (# 7 = TSB 01-36-013 and # 13 =TSB 02-36-018).

VEHICLES AFFECTED:

Cold Stumble: All 2000-2002 ACCENT vehicles with 1.5L SOHC and 1.6L DOHC engines.

P0116: 2002 Accent with 1.6L DOHC engine.

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:

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. LC 00~02MY COLD STUMBLE [ERROR]".





WARRANTY INFORMATION: