Engine Controls - Hard Start/Extended Crank Time
L-SB-0009-08Rev1
February 25, 2008
Intermittent Extended Crank/Hard to Start
Service Category
Engine/Hybrid System
Section
Engine Control
Market
USA
Applicability
TSB REVISION NOTICE
^ Rev1: Production Change Information section with VIN information has been added.
Any previous printed versions of this service bulletin should be discarded.
Introduction
Some 2008 model year GS 350 vehicles may exhibit an extended engine crank time/ hard to start condition. The Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) logic has been modified to prevent this condition from occurring. Refer to the following repair procedure to address the customer's concern.
NOTE
Before proceeding, verify the ECM (PCM) calibration has NOT been updated by checking for the Authorized Modifications Label (shown in step 1 of the Repair Procedure).
Production Change Information
This TSIB applies to vehicles produced BEFORE the Production Change Effective VINs shown.
Warranty Information
^ This repair is covered under the Lexus Federal Emission Warranty. This warranty is in effect for 96 months or 80,000 miles, whichever occurs first, from the vehicles in-service date.
^ Warranty application is limited to correction of a problem based upon a customer's specific complaint.
Parts Information
NOTE
^ The ECM (PCM) should NOT be replaced as part of the repair procedure.
^ Authorized Modification Labels may be ordered in packages of 25 from the Materials Distribution Center (MDC) through Dealer Daily Dealer Support Materials System, or by calling the MDC at 1-800-622-2033.
Calibration Identification Chart
Required Tools & Equipment
Inspection Procedure
1. If the vehicle is currently exhibiting an extended engine crank time/hard to start condition verify that NO Diagnostic Trouble Codes (DTCs) are present.
If DTCs are present refer to the Repair Manual for diagnostic procedures.
NOTE
When the intermiffent extended crank time/hard to start condition is related to the ECM (PCM) issue, fuel pressure will be within Repair Manual specifications. Injector pulse and ignition system operation will also be present.
2. If NO DTCs are present and the vehicle exhibits the above condition flash reprogram the ECM (PCM) following the Repair Procedure below.
Repair Procedure
1. Check for the Authorized Modifications Label affixed to the vehicle in the location shown in Figure 1. Confirm if the ECM (PCM) calibration has been updated. If the calibration ID listed is NOT the latest ECM (PCM) calibration go to step 2.
2. Flash Reprogram the ECM (PCM).
NOTE
^ The GR8 Battery Diagnostic Station MUST be used in Power Supply Mode to maintain battery voltage at 13.5 volts while flash reprogramming the vehicle.
^ For details on how to use the GR8 Battery Diagnostic Station, refer to the located on the Technical Information System (TIS), Diagnostics Battery.
Follow the procedures outlined in TSIB No. Techstream ECU Flash Reprogramming Procedure, and flash the ECM (PCM) with the NEW calibration file update.
3. Install the Authorized Modifications Label.
A. Using a permanent marker enter the following information on the label:
^ ECM part number [Refer to the Parts Information section for the CURRENT PART NUMBER]
^ Calibration ID(s) [Refer to the Calibration Identification Chart for the NEW CALIBRATION ID]
^ Dealer Code
^ Repair Date
^ Change Authority [This TSIB number]
B. Affix the Authorized Modifications Label to the vehicle at the location shown in Figure 1. The Authorized Modifications Label is available through the MDC P/N 00451-00001-LBL.
4. Start the engine and warm it up to normal operating temperature before test driving.
5. Test drive the vehicle to confirm proper vehicle operation.
6. The repair is complete.