Subaru SVX 1992 Manual page 338

FUEL INJECTION SYSTEM [T9P51 2-7
1 . CHECK INPUT SIGNAL FOR ECU .
Measure voltage between ECU connector terminal and
body while idling engine .
Connector fr Terminal/Specified voltage
(1361) No . 5 - Body/0 .1 - 1.0 V
Problems in heater circuit causes OZ sensor to deacti-
vate.
2. CHECK OZ SENSOR 2.
1) Idle engine .
2) Disconnect 02 sensor 2 connector .
3) Measure voltage between OZ sensor 2 connector
terminal and body .
Terminal/Specified voltage
No . 4 - Body/0 .1 - 1 .0 V
2 1
-7
43
F
V
Fig . 94
3. CHECK HARNESS CONNECTOR BETWEEN
ECU AND 02 SENSOR 2.
1) Turn ignition switch to "OFF".
2) Disconnect ECU connectors .
3) Measure resistance of harness connector between
ECU and Oz sensor 2.
Connector £r Terminal/Specified resistance
(1361) No . 5 - (1316) No . 4/0 C1
3) Measure resistance between 02 sensor 2 connector
and body .
Connector & Terminal/Specified resistance .
(1316) No . 4- Body/1 Mfg min.
4. CHECK HARNESS CONNECTOR BETWEEN OZ
SENSOR 2 AND MAIN RELAY.
1) Disconnect main relay connector.
2) Measure resistance of harness connector between
OZ sensor 2 and main relay.
Connector Fr Terminal/Specified resistance
(1316) No . 1 - (1352) No . 2/0!n
(1316) No . 2 - (1352) No . 4/0 S'2
5. CHECK POWER SUPPLY CIRCUIT OF MAIN
RELAY.
1) Turn ignition switch to "ON" .
2) Measure voltage between main relay connector ter-
minal and body .
Connector Fr Terminal/Specified voltage
(1352) No . 2 - Body/10 V, min .
(1352) No . 4 - Body/10 V, min .
91