Establishing Communications

Establishing Communications

When cable connections are completed, switch on the vehicle ignition. The electronic control units will 'wake up' and communication between the selected control unit and the PDU will be established.

As communication is established with the selected system, a system menu similar to that below will be displayed.

System Menu Selections

The options for each vehicle system are described in detail on the following pages but menu entries fall into the following general areas:

Datalogger

The Datalogger function is described in detail using a worked example at the end of this PDU Users Guide.

Diagnostic Trouble Codes

This application enables the PDU to monitor selected control module trouble codes and provides the following functions:

• Decode and display any trouble codes logged by the control module being monitored.
• When supported by the module, decode and display enhanced trouble codes, together with any count of the number of occurrences
• Clear all of the trouble codes and freeze frame data logged in the control module.
• Monitor other data such as the alarm history in this example.

Note: The 95 model year Zytek engine management system permits clearing of individual trouble codes selected by the technician on the PDU.

System Specific Tests

These menu entries cover special tests required to program or test system specific features. The following are examples of tests provided:

• Engine: KOEO and KOER tests, OBDII Readiness test, Output State Control test, Throttle Potentiometer track test
• PATS: Ignition Key Learn Menu
• Security: Remote Transmitter Key Learn Tests, Special Functions Programming

Exit

Selecting and then confirming the exit option will return the PDU to the Main Menu.

PDU Use

In the following pages, the use of the PDU on each vehicle system is described.

• Engine Diagnostics
• Transmission Diagnostics
• Climate Control Diagnostics
• Anti-Lock Brakes Diagnostics
• Passive Anti-Theft (PATS) Diagnostics
• Security System Diagnostics
• Airbag Diagnostics
• Seat Belt Pretensioner Diagnostics

After these system specific descriptions, the following general purpose functions are described:

• Datalogger
• Digital Multi-Meter
• Diagnostic Trouble Codes
• Printing
• Training
• OBD II Scan Tool
• User Self-Test