Volkswagen Workshop Service and Repair Manuals

Note:

The engine rpm signal output is on contact 41 of engine control unit. Amongst other things the signal is necessary for the rev. counter in dash panel insert.

Special tools, workshop equipment, testers, measuring instruments and auxiliary items required

• ◆ Test box V.A.G 1598/22
• ◆ Adapter set V.A.G 1594
• ◆ Hand multimeter V.A.G 1526 or multimeter V.A.G 1715
• ◆ Current flow diagram

Test conditions

• ● No faults must be stored in fault memory , interrogating and erasing fault memory.

Test sequence

• ‒ Remove wiper arms and cowl panel:

=> Electrical system; Repair group 92; windscreen wiper system; removing and installing windscreen wiper system

• ‒ → Connect test box V.A.G 1598/22 to control unit wiring harness.
• ‒ Check wiring from test box contact 41 to dash panel insert for open circuit using current flow diagram:

=> Current flow diagrams, Electrical fault finding and Fitting locations