Home ReviewsRefund
Home/Audi/A6/Audi A6 C5 facelift (2001-2004)/Repair manual/On Board Diagnostic (OBD) - 5 Spd. Automatic Transmission 01V/Example 3
Contents Wiring diagrams Section: On Board Diagnostic (OBD) - 5 Spd. Automatic Transmission 01V All sections

Example 3 Audi A6 C5 facelift

On Board Diagnostic (OBD) - 5 Spd. Automatic Transmission 01V 2 illustrations ~295 words

Example 3

Using the DTCs stored in the memories, you have determined that none of the control modules are sending or receiving signals.

Control moduleDTCs stored in DTC memories
1Hardware faulty
2Hardware faulty
3Hardware faulty

DTC MEMORIES - NONE OF THE CONTROL MODULES ARE SENDING OR RECEIVING SIGNALS

  1. Switch ignition off.
  2. Disconnect the control modules connected across the bus wires and check for a short circuit between the bus wires.

Scheme 970

Scheme 970
Scheme 970
  1. Check the bus wires for short circuit to B+ or Ground (GND).

Scheme 971

Scheme 971
Scheme 971
  1. If no malfunctions could be found in the bus wires: Check whether one of the control modules is responsible for a short circuit of the bus wires to each other, to B+ or to Ground (GND).

Disconnect each of the control modules connected via the bus wires one at a time and check whether the malfunction "Hardware faulty" is eliminated.

If it is eliminated, replace the control module that is currently disconnected. If it is not eliminated, re-connect that control module and disconnect the next control module connected via the bus wires.

  1. «OVERHAUL - 01V»(ref-172633)
  2. Electrical Wiring Diagrams

Note. Use VAG1526A multimeter for the test. The tables list which measuring range to select before taking each measurement. The specified values are valid for an ambient temperature range of 0-40°C (32-104°F). If the values obtained differ from the specified values, determine the malfunction using the applicable wiring diagram. If the measured values only deviate slightly from the specified values clean sockets and connectors of testers and repeat test. Before replacing a component, test the wires and connections Especially if the specified values are below 10 ohms, repeat the resistance measurement on the component. Use VAG1598/20 adapter to connect test equipment. The contact numbers of the connector and the socket numbers of VAG 1598/20 test box match up. see scheme 280

CAUTIONTo avoid destruction of the electronic components, the appropriate measuring range must be selected on tester before connecting the measuring leads.