TECH TIPS

Reference Number(s): TT 01-11-05, Date of Issue: July 29, 2011

VOLKSWAGEN:	All Models
GROUP:	01 - On-Board Diagnostic

SERVICE INFORMATION

All Models - Control Module Coding Information

Updated to Include Test Character Screen Information.

When long coding a control module through Vehicle Self Diagnosis, the first screen may request a test character to be entered (Fig 1). DO NOT enter a value on this screen. Select "Q" to go to next screen.

Select the "OK" button on the pop up screen that follows (Fig 2) to go into the actual long coding.

The screen should display the Hex Bytes on the left side of the screen at that point. Click on a Hex Byte to pull up the keyboard in order to change the Byte. Once all Bytes are changed, remember to press the forward arrow in order to submit the new coding into the module.

Fig 1: Vehicle Self Diagnosis Screen Requesting A Test Character

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Control Module Coding Information (TT 01-11-05)