Page 296 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

EXERCISE 16.2: Identify engine trouble by using scan tool

Objectives

At the end of this exercise you shall be able to
• identify the data link connector location and connect engine scanner
• read the diagnostic trouble code.

Requirements

Tools/Equipments Machines
• Trainee’s toolkit - 1 No. • A running condition of CRDI light motor
• Engine scan tool - 1 No. vehicle - 1 No.
• OBD-II connector - 1 No. Materials
• Cotton waste - 1 No.

Procedure

1 Keep ready the scan tool related service manual for the vehicle.
2 Attach the proper test connector cable to the scan tool.

3 Ensure that the ignition switch is in the ‘OFF’ position.
4 Locate the correct location of diagnostic Data Link connector. (Fig 1)
5 Attach the scan tool test connector (OBD_II)to the diagnostic Data Link connector(DLC). (Fig 2)

Fig 1 Fig 2

OBD II scan tools are powered from terminal 16 of the diagnostic connector, and no other power
connection are needed.

6 Observe the scan tools screen to ensure that the scan tool is working properly.
7 Enter vehicle information’s needed as required by the scan tool.
• Most OBD II scan tools automatically read the vehicle identification number (VIN). When the ignition switch
is turned to the ‘ON’ position. This gives the scan tool the information needed to check for codes and
perform other operation.
• Older scan tools are programmed with the proper vehicle information by entering the vehicle year, engine
type and other information. This information is usually contained in certain numbers and letters in the VIN.
8 Turn the ignition key to the ‘ON’ position.

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CITS : Automotive - Mechanic Diesel - Exercise 16.1