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Re: oil warning buzzerw -PLEASE help!
In message <36B4C2A2.5F6A924E@pixar.com> Arun Rao writes:
> > I've just serviced my car - oil change and oil filter change.
> > After driving for about half an hour, the oil warning buzzer came on.
> > we pulled over, had a look at level. nothing too unusual ...
I posted the ur-quattro MB oil buzzer check procedure a couple of years
ago. Dan's rework of the archives meant I could find it immediately.
It's for the Type 85 and the MB engine - it may need modifying for the
Type 44 and MC ...
>From "Reparaturleitfaden Audi quattro, Ausgabe 10/87, D 000.5147.00.00"
Procedure for checking oil warning light - MB engine
a) Engine correctly filled with oil.
b) Oil warning light must be on when ignition switched on and engine
c) Oil temperature must be at least 80c.
d) Rev counter must be functioning normally
If the oil warning light does not come on check the oil pressure
sender (G10) and the controller (J114, control number 234).
Only contact "G" on the oil pressure sender is used.
Remove the connector from the oil pressure sender G10.
Connect VAG 1526 [an ohmmeter, I presume] to contact G on G10 via
an extension cable and to chassis ground.
Switch VAG 1526 to the 200 ohm range.
With the engine off, the reading should be 5 to 10 ohms.
With the engine idling, the reading should be 70 to 120 ohms.
With the engine at 3000rpm, the reading should be 170 to 200 ohms.
Attach the ohmmeter between contact WK on G10 and chassis ground.
With the engine idling, the resistance should be zero to 0.5 ohm.
With the engine off, the resistance should be infinite.
If any of the preceding tests fail, replace G10.
Procedure for checking oil warning lamp control unit - MB engine
Pull the control unit out of its position (6) on the auxiliary
Connect the VAG 1527 diode check light to contacts 4 and 5 of the
Switch on the ignition. The diode must light up. If not, check for
a circuit fault using the circuit diagram.
Connect the diode check light between contacts 5 and 8 of the socket.
Turn the engine over with the starter motor. The diode check light
must blink during the start procedure, and glow steadily with the
motor running. If not, check for a circuit fault using the circuit
Connect the diode check light between contacts 2 and 4 of the socket.
Switch the ignition on. The diode must light up. If not, check the
oil pressure sender and/or the circuit for faults.
Pull the connector G off the oil pressure sender G10. The diode must
not light up. If it does, check for a short circuit using the wiring
Connect contact 6 of the socket to chassis ground using a piece of
wire. The oil warning light must light up. If not, check for a
circuit fault using the wiring diagram.
If all tests are completed successfully, replace the J114 control unit.
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