Volkswagen Golf Quiz
Electrical system, general information

Dealing with problems with Midtronics -MCR340V- battery tester

In this manual: Electrical system, general information
General body repairs, exterior — 230General body repairs, interior — 279General information, paint — 133Vechile- specific paint information — 27Heating, air conditioning — 156Auxiliary heater — 58Air conditioning system with refrigerant R134a — 1297- speed dual clutch gearbox 0CW — 544- cylinder injection engine(1.4 1 direct inction. turbocharger) — 182Fuel supply system - Petrol engines — 59Running gear, axles, steering — 221Brake system — 92Wheels and Tyres guide — 12Guide for using trailers — 11Wheels and Tyres Guide - General Information — 121Brake system (hybrid) — 73Electrical system — 326Communication — 65Electrical system, general information — 111
~1min read

Under certain circumstances, the display may show errors or messages according to status. The most frequent display messages are listed below, together with suggested solutions. Note

For messages not listed here, please refer to → operating manual MCR340V.
Display message Measures
No display
  • Check whether terminals of battery tester are firmly connected to battery terminals.
  • Check battery terminals are tightened according to regulations and do not have corrosion.
  • Charge battery → Chapter.
System noise
  • Switch off all electrical consumers.
  • Wait until all electrical loads monitored by onboard supply control unit have switched off.
  • Remove ignition key.
  • Disconnect any suspect non-standard electrical equipment from the onboard supply.

Wait a few minutes and test again → Chapter.

Note If you have performed the test at jump-start point and the message does not disappear, perform the test directly on the battery.

Test yourself

A quick Volkswagen Golf quiz: every answer comes with an explanation and a link to the manual page.