Subaru Impreza 2003 Service Manual page 2496

DIAGNOSTICS PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ABS (DIAGNOSTICS)
AD:DTC 54
— STOP LIGHT SWITCH SIGNAL CIRCUIT MALFUNCTION —
DIAGNOSIS:
• Faulty stop light switch
TROUBLE SYMPTOM:
• ABS does not operate.
WIRING DIAGRAM:
STOP LIGHT
SWITCH
B64
1 2
Step
1 CHECK OUTPUT OF STOP LIGHT SWITCH
USING SUBARU SELECT MONITOR.
1)Select "Current data display & Save" on the
Subaru Select Monitor.
2)Release the brake pedal.
3)Read the stop light switch output in Subaru
Select Monitor data display.
2
LHD
1
B64
LHD
*1 ABSCM&H/U
B65
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
1 2
3 4
27 28 29 30 31
Is the reading indicated on
monitor display less than 1.5
V?
ABS-156
BATTERY
RHD
B61
F44
*1
16 17 18 19 20 21 22
23 24 25 26
Check
E
STOP LIGHT
SWITCH
OC WC
1 2
2 3
B64 : OC
B65 : WC
OC :
WITHOUT CRUISE
CONTROL
WC : WITH CRUISE
CONTROL
B301
*1: LHD
RHD
F49
F44
1 2 3 4
5 6 7 8
Yes
Go to step 2. Go to step 3.
ABS00366
No