LCS Code Troubleshooting Strategy (Using FREELANDER 30) (TB/01/04/NAS)

Publication date: 2004-08-20
Reference number: TB/01/04/NAS

LCS CODE TROUBLESHOOTING STRATEGY (USING FREELANDER 30)

TECHNICAL SERVICE BULLETIN

Reference Number(s): TB/01/04/NAS, Date of Issue: 20 August, 2004

LAND ROVER:	Freelander (LN)
ISSUE:	3

AFFECTED VEHICLE RANGE

Freelander (LN): All

SITUATION

LCS CODE CORRUPTION CAUSES T4 COMMUNICATION AND VEHICLE PROBLEMS

Use of older Freelander T4 discs May have caused LCS codes to be corrupted. This can lead to the following conditions:

Problems communicating with T4 to the vehicle (SAWDOC/EWS immobilization)
Problems with vehicle immobilization
Incorrect engine tune installed leading to incorrect faults being flagged - EXAMPLES:
- P1383 ignition feedback resistor open circuit
- Wide open throttle cannot be achieved
- Degraded emissions performance (catalyst loading is affected)
- Airflow meter errors
- Spark duration faults
Vehicle gearbox may appear to shift harshly, gearbox warm up time impaired

RESOLUTION

CONSISTENT LCS TROUBLESHOOTING PROCESS ASSISTS PROBLEM RESOLUTION

CAUTION: If T4 displays "mis-matched" or "invalid" during the initial LCS check, verification that the cable connector pins are in good condition and ensuring proper battery voltage is available should be the first step in problem resolution. These are the most common causes for T4 to display an LCS warning indicating that LCS is missing from one or more ECU.

Locate and follow the proper flowchart in the Procedure section of this TIB based on the T4 behavior encountered at the start of the diagnostic session

T4 opens at the Main Menu without LCS warnings.
T4 warns LCS is "Mis-Matched".
T4 warns LCS is "Invalid".
T4 initiates an automatic tune update WARNING.

TOOL INFORMATION

CAUTION: Use only the latest "Freelander 30" disc for all operations.

T4 Disc: "Freelander 30"

DDW WARRANTY CLAIMS

DDW requires the use of causal part numbers. Labor only claims must show the causal part number with a quantity of zero.

DDW WARRANTY CLAIMS

Description	SRO	Time (Hours)	Condition Code	Causal Part
Update ZCS codes	86.90.89/27	0.3	42	YWC106631H
Tune download Engine tune with T4 connected	12.90.89/28	0.3	42	YWC106631H
Tune download AT tune with T4 connected	44.90.89/28	0.2	42	YWC106631H

Normal warranty policy and procedures apply.

Material allowance is included in labor operation.

REPAIR PROCEDURE

CAUTION: The attached troubleshooting flow charts are valid only with "Freelander 30" T4 discs.

NOTE: In several places the technician will be referred to the "LCS Field Guide " published on Info Trail. Follow the LCS icon parameters to resolve the specific condition encountered. Technicians should read and be familiar with this reference document to aid in understanding the flowcharts.

Ensure the vehicle battery is in a satisfactory state of charge and install a battery charger on low amp setting before beginning diagnostics.
Observe T4 startup screens whenever initiating a test session with a Freelander vehicle,
Select the correct flowchart to ensure proper LCS verification diagnostic processes are being followed.
Follow the diagnostic troubleshooting logic based on the specific situation generated at the start of the T4 session with the vehicle.

Fig 1: T4 @ System List w/o LCS Warnings.

Courtesy of LAND ROVER NORTH AMERICA, INC.

Fig 2: T4 @ Main Menu After "LCS To Text" Review.

Courtesy of LAND ROVER NORTH AMERICA, INC.

Fig 3: T4 Warns LCS is "Mis-Matched"

Courtesy of LAND ROVER NORTH AMERICA, INC.

Fig 4: T4 Warns LCS is "Invalid"

Courtesy of LAND ROVER NORTH AMERICA, INC.

T4 begins LCS "Automatic Update"

CAUTION: Automatic updates should never be performed with any disc prior to Freelander 28. Older discs will corrupt LCS data on some specs of Freelanders. (mostly 2A3xxxxx VIN vehicles.)

Follow on screen instructions, keeping in mind that if the vehicle requires diagnosis of powertrain ECU's for drivability or DTC's, then tune updates must be rejected until all diagnosis is complete.