Subaru IMPREZA 2002 Service Manual page 148

I
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION [DIAGNOSTICS)
Step
4
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1)Connect the connectors to TCM, throttle
position sensor and ECM.
2)Connect the Subaru Select Monitor to data
link connector.
3)Turn the ignition switch to
ON
(engine OFF).
4)Turn the Subaru Select Monitor switch to ON.
5)Throttle fully closed.
6)Read the data of throttle position sensor
using Subaru Select Monitor.
*Throttle position sensor input signal is indi-
cated.
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
Throttle fully open.
NOTE:
Must be changed correspondingly with acceler-
ator pedal operation (from "released" to "de-
pressed" position).
TLE POSITION SENSOR POWER SUPPLY).
Measure the voltage between TCM connector
and chassis ground.
5
6
CHECK INPUT SIGNAL FOR TCM (THROT-
. -
Connector & terminal
Non-turbo model
Turbo model
(855) No. 1 (+)
-
Chassis ground ( - ) :
(B54) No. 2 (+)
-
Chassis ground (-):
7 CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR (THROTTLE
POSITION SENSOR POWER SUPPLY).
Read the data of throttle position sensor power
supply using Subaru Select Monitor.
*Throttle position sensor power supply voltage
is indicated.
8 CHECK POOR CONTACT.
Check
s the value voltage between
ipprox. 0.5 V?
s
the value voltage between
ipprox. 4.3 V?
s the voltage between 4.8 and
i.3 V?
s
the value voltage between
..8 and 5.3 V?
s there poor contact in throttle
losition sensor circuit?
Yes
30 to step 15.
30 to step 17.
Even if the AT OIL
rEMP warning
ights up, the cir-
:uit has returned
o
a normal condi-
ion at this time.
A
emporary poor
:ontact of the con-
lector or harness
nay be the cause.
3epair harness or
:onnector in throt-
le position sensor
:ircuit.
Even if the AT OIL
rEMP warning
ights up, the cir-
:uit has returned
o
a normal condi-
ion at this time. A
emporary poor
:ontact of the con-
lector or harness
nay be the cause.
3epair harness or
:onnector in throt-
le position sensor
:ircuit.
No
20 to step 18.
i o to step 18.
i o to step 18.
i o to step 18.
:ontact. <Ref. to AT-45,
Transmission Con-
trol Module
AT-56