Extended Cranking Time or Hard to Start (Reprogram ECM Using SPS) (06-06-04-055A)

Publication date: 2007-02-20
Reference number: 06-06-04-055A
Supersedes refnos: 06-06-04-055

Extended Cranking Time or Hard to Start (Reprogram ECM Using SPS)

TECHNICAL SERVICE BULLETIN

Reference Number(s): 06-06-04-055A, Date of Issue: February 20, 2007

Affected Model(s):	2006-2007 Chevrolet Optra; with 2.0L 4-Cylinder Engine (VIN Z - RPO L34) and 4-Speed Automatic Transaxle; Built Prior to VIN Breakpoint 7K617304
Supercedes:	This bulletin is being revised to add the 2007 model year, revise the VIN breakpoint and update the calibration information. Please discard Corporate Bulletin Number 06-06-04-055 (Section 06 - Engine).

Condition

Some customers with vehicles equipped with automatic transaxles may comment on extended cranking time or that the engine is hard to start, after an overnight cold soak in 15-20°C (59-68°F) temperatures. After starting the engine, there may be no symptoms or DTCs and the condition may not occur when restarting.

Cause

This condition may be caused by a lean fuel condition in temperatures between 15-20°C (59-68°F).

This condition affects vehicles equipped with automatic transaxles only; vehicles equipped with manual transaxles are not affected.

Correction

Reprogram the engine control module (ECM) with the appropriate calibration following the procedure below.

IMPORTANT: Prior to reprogramming, check the battery voltage state. If the battery is not fully charged, charge the battery.

IMPORTANT: Prior to reprogramming, make sure the Tech 2(R) is updated with the latest software.

Reprogram the ECM with the appropriate calibration (or later) listed below. These calibrations, or any that follow, are designed to address this concnern. Refer to Service Programming System (SPS) in SI. For the appropriate calibration, refer to Calibration Information below.
The new ECM calibrations will be available to dealerships on TIS2Web version 2.5 for 2007 (available 2/19/07).
Check for any DTCs in the ECM/TCM. Clear any DTCs that are stored.

Calibration Information

Engine/Transmission	ECU Part No. (I.D.)	Cal. Data Name	Calibration ID
MY 2006, H2.0D / AT	9685 1097 (PD)	KMCK	28089747
MY 2007, H2.0D / AT	9685 1087 (PF)	KMDK	28089755

Warranty Information

For vehicles repaired under warranty, use:

Warranty Information

Labor Operation	Description	Labor Time
J6354	Powertrain Control Module-Engine Reprogramming with SPS	Use Published Labor Operation Time