Subaru SVX 1992 Manual page 750

4-3 (wA1] STEERING SYSTEM
4. Self-Diagnosis System
A: Function
1 . SELF-DIAGNOSTIC FUNCTION
1) U-check mode :
Allows warning lamp to illuminate and trouble to be
stored in memory if problem occurs .
2) Read memory mode :
Allows trouble memorized in U-check mode to read out .
3) D-check mode:
Used when troubleshooting systems .
4) Clear memory mode :
Clears or erases trouble stored in memory .
Troubleshooting and self-diagnostic results are identi-
fied by number of flashes on steering warning lamp
located in instrument panel.
2. TROUBLE CODE
Trouble
code
Check points
"ON" pattern "ON"
Unit : second
VF Power supply voltage or lamp wiring ON
WF Check mode terminal, lamp, wiring
OFF
1 Shorted solenoid circuit
o .3 1 .2 0 .3
2 Disconnected solenoid
0 .3 0.3 '0-3
1 .2
p~
R H
® ®
® ® ®'
3 Vehicle speed sensor 2 system
o 0.3'0 .30 .3-0 .3 1 .2
R
4 Backup power supply system
-30
0 .3 0 .3 0.30.3 0 .30.3 0 .3
1 .2
® ® ® ® ® ® ®~
.
5 Engine speed signal system( incl . EGI ECU )
T-i ~
r
0 .3 0 .3 '_ .k3 ' _ a 0.3 0 .3 0 .3 0 .3 1 .2
pm
-lf's
1i
-----------------------
- Normal
0 ' s 0
When two or more trouble codes are displayed :
Example : Trouble codes are 1 and 3 .
El M
0.3
1 .2 0 .3 0.3 0.3 0.3 0 .3 1 .2
0.3
Fig. 27
I B : FAIL-SAFE FUNCTION
C4-286
Faulty system Description Control function
When vehicle speed sensor 2 is disconnected To maintain "assist" characteristic at the time
during driving the trouble occurred .
Vehicle speed sensor 2
When vehicle speed sensor 2 is disconnected To control by engine speed sensing instead of
before driving vehicle speed .
Engine speed signal system
Engine r .p.m . is not input while vehicle speed
To control by vehicle speed sensor 2 alone .
sensor 2 is input .
Solenoid
Solenoid valve coil harness is disconnected or
To turn "OFF" solenoid (Heavy steering)
shorted .
ECU ECU is faulty . To turn "OFF" solenoid (Heavy steering)
20