Intermittent Problems; Iqa/Ima Code Programming - Mahindra XUV 500 Diagnostic Manual

DIAGNOSTIC MANUAL

INTERMITTENT PROBLEMS

Check the following for intermittent problems
 Poor mating of the connector halves/damage of connector locking
 Terminals not fully seated in the connector body
 Damage of harness and terminals
 Connector pin separation from wire
 Corrosion on pin contact points

IQA/IMA CODE PROGRAMMING

An ECU controlled engine needs precise metering of fuel. Due to manufacturing tolerances, each
injector deviates slightly from its idealized behavior. Thus, each injector has a correction factor,
which is engraved on top of it, in the form of a 8-character alphanumeric code , out of which the
last character "W" is a dummy value. This is known as an IQA code/IMA code. For optimal
performance of the engine, the ECU needs to know the IQA code/IMA code of each injector. This
information is programmed into the ECU when the vehicle is manufactured. However, if you need
to replace an injector(s), then the IQA code/IMA code for that new injector has to be updated in
the ECU. The cylinder number starts from the right side of the vehicle.
As a first step, you need to select the cylinder number of the injector being replaced. After the
cylinder number is selected by clicking on the check-button next to the number, the IQA
code/IMA code should be entered in the box provided.
Caution
Even though on the injector, 8 character alphanumeric code is engraved , while writing
the IQA code only the first 7 digits need to be entered
Click the button to the right of the text box. If the Injector code is valid and accepted by the ECU,
a message is displayed, indicating that the operation is performed successfully.
A message "Invalid IQA code" will be displayed , if an incorrect IQA/IMA code is keyed in. IQA
codes are case sensitive.
Programming IQA codes is an extremely important activity. In order to ensure that the correct
code has been entered and that it has been entered in the correct cylinder, SMART tester allows
you to verify the codes that you have entered.
The repair methods given by the manufacturer in this document are based on the technical specifications, current at the time of release. The methods may be modified as a result of changes introduced by the
manufacturer in the production of the various component units and accessories from which the vehicles are manufactured. The reproduction, translation, transmission, in part of or whole of the present document,
are prohibited without the prior written consent of Mahindra & Mahindra Ltd. The use of this document by any person other than the trained personnel, at the Authorized Service Centre of Mahindra & Mahindra Ltd.,
will amount to unauthorized use and shall be liable for penalty/prosecution© 2011 Mahindra & Mahindra Ltd.
EMS
MAN-00152
OCT 2011/Rev 1
11