Subaru IMPREZA 2002 Service Manual page 280

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
ABS (DIAGNOSTICS)
Display screen
FR wheel speed
AH:FREEZE FRAME DATA
NOTE:
Data stored at the time of trouble occurrence is
shown on display.
Each time trouble occurs, the latest information
is stored in the freeze frame data in memory.
Freeze frame data will be memorized maximum
to three.
If freeze frame data is not properly stored in
memory (due to a drop in ABSCM power supply,
etc.), a diagnostic trouble code (DTC), preceded by
a question mark "?", appears on the select monitor
display. This shows it may be an unreliable read-
ing.
Contents to be monitored
Wheel speed detected by the Front Right
ABS sensor is displayed in km/h or mile/
h.
Stop light switch
ABS signal to
TCM
Wheel speed detected by the Front Left
Wheel speed detected by the Rear Right
Stop light switch signal
ABS operation signal from ABS control
module to TCM
Wheel speed detected by the Rear Left
ABS sensor is displayed in km/h or mile/ RL wheel speed
I h .
ABSCM power
voltage
Power (in volts) supplied to ABSCM&H/U
I
appears on the select monitor display.
Refers to vehicle acceleration detected
by the analog G sensor. It appears on
the select monitor disDlav in volts.
G sensor output
voltage
Motor relay mon-
itor
I
Motor relay operation monitor signal
ABS operation signal from ABS control
ABS-AT control module to TCM
ABS 'peration
I
ABS operation signal
sianal
ABS-94