Volvo RWD 140-160 Forum

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Djet computer fixable? 140-160 1972

The web site works just fine on my PC through a dial-up connection, and from work through a high speed connection. I just copy and past the addr. in my browser. I've had this from someone else as well, where their service provided blocked a very good site. The person just tried a different service provided, and it worked. Can I e-mail it to you? It is just over 300k in size.

If you did not get the schematic, you will not understand what I've meant. Inside the ECU there are 2 output stages, each driving 2 injectors (as you know). From each injector to the relevant output stage there is a 6 Ohm 5W ballast resistor connected in series between the injector and the output stage (i.e. 4 in total, one per injector). The part that could burn out due to a short circuit of an injector is the relevant resistor in the ECU, because then you will have 7W dissipating into a 5W rated resistor. If one injector on one output stage is working and the wiring is correct, it can only be the resistor that is burnt out (1$) or the solder that is broken or circuit track that is burnt (0$). Both conditions are inside the ECU, and you will have to open it. There will be no further damage, since we know both output stages work. To confirm 100% without opening it, measure the resistance between the connector pins as I've described before, with cables unplugged. The 12 Ohms that you should measure is 6 Ohms from the connector to the output stage, and then 6 Ohms back to the connector. Also check for a short circuit between the ECU case and the pins on the ECU that the injectors connect to, which would also blow one of the resistors. If you are confused, I've got a D-Jet ECU in the garage that I could open and give more exact info, including how to open. Never opened it before, and it came with other parts I've bought.






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New Djet computer fixable? [140-160][1972]
posted by  someone claiming to be andyknight  on Mon Jul 28 15:28 CST 2003 >


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