Subaru SVX 1992 Manual page 337

2-7 [TSPO]
FUEL INJECTION SYSTEM
P: TROUBLE CODE (37) - 02 SENSOR 2 (LH) -
DIAGNOSIS :
OZ sensor 2 inoperative
Faulty feed back control system
1 1 Check input signal for ECU .
TROUBLE SYMPTOM :
Erroneous idling
Rough driving
I Check contact of ECU connector terminal . I
OK
Replace ECU .
Repair ECU connector terminal .
Not OK
Not OK
Replace 02 sensor 2.
2 Check Oz sensor 2 .
OK
3 Check harness connector between ECU
Not OK
Repair or replace harness connector .
and OZ sensor 2 .
OK
4 Check harness connector between main
Not OK
Repair or replace harness connector .
relay and Oz sensor 2 .
OK
Not OK
5
Check power supply circuit of main relay.
Repair or replace harness connector .
OK
Replace main relay .
Not OK
Main relay
O
O
a : B59 d : B62
MN~+UI
SBF-2
d7<
d
ECU
V U
8]b
02 Sensor 2 _
000000000
a
a
---------------------------
U
C2-363
Fig. 93
OK
90