Porsche 928 Workshop Manual page 1270

39
Differential, transaxle system
929
Fautt, DTC
Test point 2
Lateral acceleration
sensor, short-circuit/
discontinuity
DTC 12
Possible causes, remedy, notes
Wiring between control unit and lateral acceleration sensor not in
working order (discontinuky. short circuit to plus or short circutt to
ground), or the lateral acceleration sensor itself is damaged.
The following wiring is installed:
- Power supply to sensor (5 Voit) =
PIN 15 at control unit - PIN 3 at sensor
- Ground for sensor =
PIN 9 at control unit - PIN 1 at sensor
- Signal from sensor to control unit
(2.7 f 0.14 Volt with car in normal-load position) =
PIN 34 at control unit - PIN 2 at sensor
1. Check power supply (approx. 5 Volt) at the sensor plug after de-
taching it, with the ignition switched on. PIN 1 (-) and PIN 3 (+).
Note
The sensor is located under the let&hand seat.
-
2. Check for discontinuity or short circuit to ground at the wire
between PIN 2 at the sensor plug and PIN 34 at the control unit
plug after this has been detached.
3. Conned the plug to the sensor. Check the installation poskion of
the sensor and its function by testing the output signal. To make
this check, connect the %-pin ABS 2-LED adapter lead to the con-
tmt unit plug. Connect the multimeter to sockets B and C.
For the measuring procedure and nominal Values, see Pages
D39-219...D39-222.
D39 - 232
PSD diagnosis/Troubleshooting
Printed in Gemumy - XXXV. reo6