Differences KWP versus UDS

ODX at Volkswagen and Audi

ODX = Open Diagnostic data eXchange (ASAM/ISO-Standard)

ODX BegriffserklärungWhat sigifies „ODX“?

ODX describes all diagnostic data,

which is necessary for the data exchange between (VAS) testequipment and the ECUs in the car.

Motivation for the introduction of ODX

What is changing in the ECU and the tester

with KWP 2000 light plus

VW / Audi-specific

Sensors Actuators

raugh values

Calculation

Application

with ISO TP / UDS / ODX:

Application

Calculation

ISO-API

commutability through standardized

interfaces

Sensors Actuators

raugh values

Comparison KWP 2000 versus UDS / ODX

Visualisation of the function „read measure values“

old

??

actual: missing information

Comparison KWP 2000 versus UDS / ODX

Visualisation of the function „read measure values“

new

any selection

new ECU with ISO UDS/ ODX

with description and scale unit

… with ISO UDS/ ODX

Comparison KWP 2000 versus UDS / ODX

Actuator test with KWP2000

Complicated statemachine in the ECU

indicator(in the mirror)

mirrorfunction

Motor for central locking

Ilumination

run up window lifter

lower window lifter

leaving home lights

Activate actuator test

VAG-Codes.xls

85% Ein Aus Inaktiv

ECU response:fix measurevalueblock

Comparison KWP 2000 versus UDS / ODX

Actuator test with UDS / ODX

Indicator(in the mirror)

mirrorfunction

Motor for central locking

Ilumination

run up window lifter

lower window lifter

leaving home lightsactivateactuator

ECU response:Measure values

statemachine in the tester

Comparison KWP 2000 versus UDS / ODX

Visualisation of the function– „selectiv actuator test“

actual: no function-input possible!

KWP2000

… with UDS / ODX

Comparison KWP 2000 versus UDS / ODX

Visualisation of the function - Coding

new

actual: what is coded?

old

.. with ISO UDS/ ODX plaintext