To diagnose the YaMZ-650 engine, you need diagnostic equipment from BOSCH of the KTS family (KTS 530/540/570), shown in Fig. 1

In combination with a personal computer, KTZ 5-series modules form a universal system tester (scanner) that works with any electronic vehicle control systems (engine management system, automatic transmission, ABS, airbag, etc.).

The widest range of brands and models of cars (not only with YaMZ-650 engines) with which the device works is determined by the ESI[tronic] software product that ensures its operation.

Diagnostics of the YaMZ-650 engine. Fault codes

The module is directly connected to the vehicle diagnostic connector using an adapter cable.

The control unit is automatically recognized and the actual values, error memory and other specific data are read.

KTS 530 is equipped with a multimeter for measuring voltage, resistance and current, and is also equipped with a built-in replaceable ISO-CAN adapter for automatic rewiring of the diagnostic block and a 4-pole OBD adapter.

The KTS 540 module is similar to the KTS 530 device, but can exchange data with a computer not only via a USB cable, but also via a Bluetooth radio channel.

KTS 570, which has all the advantages of the KTZ 540 module, is equipped with an advanced two-channel multimeter and oscilloscope.

Fault codes

Code 1 - 5, Code 6 - 12, Code 13 - 19

Code 20 - 26, Code 27 - 34, Code 35 - 43

Code 44 - 51, Code 52 – 59, Code 60 – 68

Code 69 – 79, Code 80 – 87, Code 88 – 92

Code 93 – 100, Code 101 – 110, Code 111 – 116

Code 117 – 122, Code 123 – 128, Code 127 – 139

Code 138 – 145, Code 146 – 153, Code 154 – 163

Code 164 – 168, Code 169 – 177, Code 178 – 183

Code 184 – 193, Code 194 – 204, Code 205 – 212

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Repair of the crankshaft consists of regrinding the main and connecting rod journals to the next repair size

The hydraulic clutch release (Fig. 1) of vehicles of the UAZ-31512 family consists of a suspended pedal 19, a master cylinder 5, a hydraulic pipe 4, a hydraulic hose 24 and a working cylinder 25