Computers and Control Systems: Tools and Equipment
Troubleshooting DMETesters and Tools
- Engine tester with oscilloscope, e.g. SUN 1010 or 1080, Bosch Mot 002.01
- Multiple tester (internal resistance at least 20 k-ohm/V).
- Adapter lead (Bosch "L-Jetronic" No.1684463 093).
- Pressure gage P378 or VW 1318.
- Two locally made electric leads for tests on multiple pin plug of DME control unit and on plug connections with the same female plug version (timer contacts).
1 Highly flexible line approx. 50 cm (20 in.) long
2 Insulated lead clip (standard)
3 Flat male plug 2.8 (N 17.457.2)
Note:
Conform with the following safety measures to avoid damage on DME system.
1. Never start engine without a connected battery.
2. Reversing connections at battery could lead to destruction of control unit.
3. Never start engine with a quick charger. Only use a different 12 V battery to help starting.
4. Disconnect battery before quick charging.
5. Never disconnect battery while engine is running.
6. Disconnect or connect multiple-pin plug on control unit only when ignition is off.
7. The ground wire between engine and body must be connected before starting engine, e.g. after reinstalling engine, since otherwise DME control unit would be destroyed.
8. Disconnect multiple-pin plug on DME control unit before welding (electric welding).
9. Pull off fuel pump relay for compression tests.
Also refer to "Dangers on Electronic Ignition Systems" for information on dangers when working on electronic ignition systems. Dangers on Electronic Ignition Systems