The KTS multi-meter functionsWe’ll first take a look at the Bosch KTS multi-meter functions that can be used alongside the ESI 2.0 vehicle diagnostic program. For technicians that use a separate oscilloscope – such as the Bosch FSA 500 or FSA 720/740 series – then the KTS 540 isperfectly suitable for multi-meter use. Please remember that if you have a KTS 540, there is no scope capability built into the VCI. This will give you confidence in your results and should certainly lead to an improved first time fix rate of your customers’ vehicles.For this article, we’ll concentrate on the multi-meter and scope functions of the KTS 570.

In Bosch ESI 2.0, there are many Service Information System (SIS) repair instructions linked to an error memory code that will suggest a direct measurement needs to be made of the voltage supply, earth path, or signal/command wire or component resistance in the system (see Fig 2).These values can be tested using the Bosch KTS multi-meter or oscilloscope, along with ‘guided’ fault finding instructions and technical data through ESI 2.0. Once a DTC is read from the error memory of a control unit, a good fault finding process is required to test the suspected component and its associated electrical circuit. The good news is that if you own a Bosch KTS 540, then it already has a single channel multi-meter included and our flagship tool – the KTS 570 – features a two channel multi-meter or oscilloscope which is all ready for you to use (see Fig 1).The kit contains high quality colour-coded test cables and probes, which use standard 4mm ‘banana’ type connectors. As we all know, often a Diagnostic Trouble Code (DTC) will only give a guide to the general area of a system that is suspected to be faulty or out of range.

Many technicians consider a graphing multi-meter or oscilloscope an extra investment, along with all of the other equipment required to effectively work on modern cars today.

KTS Diagnostic Made ‘ESI’ from Robert BoschThis regular series of technical articles from Bosch focuses on how to get the best out of its ESItronic 2.0 software, which is used in conjunction with the KTS range of diagnostic tools for vehicle fault diagnosis and service function procedures.In this month’s issue we’re going to introduce you to the added benefit of vehicle diagnosis, using the built-inmulti-meter or oscilloscope functions included in the KTS Vehicle Communication Interface (VCI), in conjunction with the serial diagnostic capabilities of the Bosch ESI 2.0 program.

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