DTC P144C Cannot Be Cleared (LTB00549NAS1)

Publication date: 2013-06-28
Reference number: LTB00549NAS1

DTC P144C CANNOT BE CLEARED

TECHNICAL SERVICE BULLETIN

Reference Number(s): LTB00549NAS1, Date of Issue: June 28, 2013

LAND ROVER:	2013 LR2 (LF); 2012-2013 Range Rover Evoque (LV)
SECTION:	303-00
AFFECTED VEHICLES:	LR2 (LF) Model Year: 2013 VIN: DH321215-DH360328; Range Rover Evoque (LV) Model Year: 2012-2013 VIN: CH600000-DH803614

MARKETS

NAS

CONDITION SUMMARY

Situation: Diagnostic Trouble Code (DTC) P144C (Evaporative Emission System Purge Flow Performance During Boost), stored in the Engine Control Module (ECM), cannot be cleared, resulting in the need to replace the ECM to resolve concern.

Cause: This may be caused by a software error. After a hard fault has been repaired, DTC P144C can be cleared but will return after/during a test drive. The last adaptive results that the diagnostic makes the failure judgement on are being stored in the ECM permanent memory. On the next drive cycle these are compared and as the stored results cannot be cleared, results in a 'fail' of the diagnostic again.

Action: In the event of a customer concern of the above, follow the Service Instruction outlined below.

PARTS

No Parts Required

TOOLS

NOTE: This document is an 'Active Bulletin' that will display a functional programming shortcut if accessed within a diagnostic session using SDD.

IDS with latest IDS-DVD and Calibration File; first available on DVD134.03 v.135

Jaguar Land Rover-approved Midtronics battery power supply

WARRANTY

NOTE: Repair procedures are under constant review, and therefore times are subject to change; those quoted here must be taken as guidance only. Always refer to TOPIx to obtain the latest repair time.

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

WARRANTY INFORMATION

DESCRIPTION	SRO	TIME (HOURS)	CONDITION CODE	CAUSAL PART
Tune download engine management ECU	12.90.13	0.20	40	LR028981

NOTE: Normal Warranty policies and procedures apply.

SERVICE INSTRUCTION

CAUTION: A Jaguar Land Rover-approved Midtronics battery power supply must be connected to the vehicle battery during IDS/SDD diagnosis/module programming.

NOTE: IDS must be loaded with DVD134.03 v.135 or later.

Connect the Jaguar Land Rover-approved Midtronics battery power supply to the vehicle battery.
Connect SDD to the vehicle and begin a new diagnostic session, by reading the VIN for the current vehicle and initiating the data collect sequence.
Follow the SDD prompts.
NOTE: Engine Control Module (ECM) may also be known as Powertrain Control Module (PCM).
Turn ignition 'ON' (engine not running).
Connect the Integrated Diagnostic System (IDS) to the vehicle and begin a new Symptom Driven Diagnostics (SDD) session.
Follow the on-screen prompts, allowing SDD to read the VIN and identify the vehicle and initiating the data collect sequence.
Select 'Diagnosis' from the Session Type screen.
Select the 'Selected Symptoms' tab, and then select the following:
- Electrical - Instruments - Warning lamps - Lamp illuminated
Select 'continue'.
Select the 'Recommendations' tab.
NOTE: Engine Control Module (ECM) may also be known as Powertrain Control Module (PCM).

From the Recommendations tab, select 'Run' to perform the 'Configure existing module - Powertrain control module' option.
Follow all on-screen instructions to complete this task.
Exit the current session.
Disconnect the IDS and the battery power supply from the vehicle.