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6.5 - Testing angle senders for throttle valve drive
The angle senders for throttle valve drive -G187 and -G188 inform the engine control unit of the position of the
throttle valve. Both angle senders are located in the throttle valve control part.
If a fault relating to angle senders for throttle valve drive -G187 or -G188 is stored in the memory, test voltage
supply to throttle valve control part.
Testing voltage supply to throttle valve control part
- Test fuse for throttle valve control part
=> Current flow diagrams, Electrical fault finding and Fitting locations binder
If the fuse is OK:
- Unplug connector from throttle valve control part.
- Switch ignition on.
- -> Connect hand-held multimeter (voltage range) between the following sockets on the connector:
6-pin connector on
wiring harness, socket
Specification
2 + earth
approx. 5 V
2 + 6
approx. 5 V
If the specifications are not obtained:
- Test wiring connections from engine control unit to throttle valve control part
.
If the specifications are obtained:
- Additionally test the signal wires and activation wires for the throttle valve positioner
.
Testing wiring for voltage, signal and activation
- Unplug connector from throttle valve control part.
Audi A8 1994 ➤
Motronic injection and ignition system (6-cylinder) - Edition 02.1999
6.5 - Testing angle senders for throttle valve drive
79