Subaru SVX 1992 Manual page 830

STEERING SYSTEM
[74G2] 4-3
1 . CHECK ENGINE SPEED INPUT SIGNAL AT 2. CHECK AND REPAIR MPFI AND ENGINE
ECU SPEED SIGNAL HARNESSES
1) Connect oscilloscope between ECU and GND. (DC 1) Turn ignition switch "OFF."
COUP, 0.5V/Piv, 5 ms/Div, x 10 probes) 2) Disconnect ECU from connectors.
2) Turn ignition switch "ON ." 3) Disconnect MPFI ECU from connectors.
3) Start engine . 4) Measure resistance between ECU connector and
4) Observe waveform pattern shown on oscilloscope
MPFI ECU connector terminals indicated below.
screen .
Connector fr Terminal/Specified resistance :
Connector fr Terminal/Specified voltage : (1353) No. 3 - (1361) No. 16/1 f; max .
(B53) No . 3 - Body/0 *--+ 10V (B53) No. 3 - Body/1 Mfg min .
B53
1
C4-590
. ,y .
Fig . 204
. ..V
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101