Diagnostics

PDU Functions

The PDU main menu provides access into the following functions:

• Diagnostics
• Training
• Digital Multimeter
• User Self Test

Diagnostics

On selecting 'Diagnostics' from the main menu, the user will be prompted to enter the features and market specification of the vehicle to be tested. Use of the diagnostics in each of the above areas is described later in this guide.

Diagnostics Menu - 95 Model Year

• Engine
• Anti-Lock Braking System

• Transmission
• Climate Control

Diagnostics Menu - 97 Model Year

• Engine Diagnostics
• OBD II Scan Tool
• Airbag
• Seat Belt Pretensioner

• Engine Datalogger
• Climate Control
• PATS System

• Transmission
• Anti-Lock Braking System
• Security

Digital Multimeter

The Digital Multimeter function provides the capability to measure voltage, current, resistance, frequency, pulse width, pulse period, and duty cycle. These measurements are usually made using the PDU measurement probes. Measurements may also be made using the module pin selection function on the Teves Mk II braking system and on the Air Conditioning system.

Training

An on-screen programme is provided to train new users in the use of screen icons and in the use of the digital multimeter and datalogger functions.

User Self Test

In order to prove that the equipment is functioning correctly, a complete user self test is incorporated. The user is directed to test the PDU and then to progressively connect each part of the PDU system which will be tested by the software. Any fault identified during the test is notified to the user. If no faults are identified, the user is advised on the correct functioning of the system.

PDU Power

Power for the PDU is supplied via an internal rechargeable battery pack which can keep the PDU operational for approximately one hour when disconnected from the base station and the vehicle. In order to preserve PDU battery charge, power to the screen backlight is automatically cut after five minutes of inactivity. The power ON indicator remains lit, indicating that the PDU is in 'stand-by' mode. One touch of the screen will restore backlight power.

When connected to the base station, power is supplied to the PDU from the Electronic Module to recharge the PDU battery pack as necessary.

On 95 MY vehicles, the Vehicle Battery Adaptor (VBA) is used to maintain PDU power.

On 97 MY vehicles, when connected via the MPA to either diagnostic socket on the vehicle, power is supplied via pin 4 (chassis ground) and pin 16 (battery power) to maintain PDU power at all times even when the vehicle ignition is switched off.

On all model years, when connected to the air conditioning system using the VIA, the vehicle battery adaptor (VBA) must also be used to maintain PDU power.