4AT(diag)-50
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK DTC.
Is DTC of CAN communication
displayed?
Perform the diag-
nosis according to
DTC.
Go to step
2
.
2
CHECK BODY INTEGRATED UNIT.
1) Turn the ignition switch to “OFF”.
2) Connect the Subaru Select Monitor to data
link connector.
3) Turn the ignition switch to ON.
4) Run the Subaru Select Monitor.
5) Read the data of “Stop Light Switch” using
Subaru Select Monitor. <Ref. to LAN(diag)-15,
OPERATION, Subaru Select Monitor.>
Is “OFF” displayed?
Go to step
3
.
Go to step
4
.
3
CHECK TCM.
Read the data of “Stop Light Switch” using Sub-
aru Select Monitor. <Ref. to 4AT(diag)-15,
OPERATION, Subaru Select Monitor.>
Is “OFF” displayed?
Check for poor
contact in connec-
tors or harnesses,
and repair the
defective part.
Replace the TCM.
<Ref. to 4AT-63,
Transmission Con-
trol Module
(TCM).>
4
CHECK BODY INTEGRATED UNIT INPUT
SIGNAL.
1) Disconnect the harness connector of body
integrated unit.
2) Measure the voltage of harness between
body integrated unit and stop light switch.
Connector & terminal
(B280) No. 2 (+) — Chassis ground (–):
Is the voltage 10 V or more?
Go to step
5
.
Go to step
7
.
5
CHECK STOP LIGHT SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from stop light
switch.
3) Measure the resistance of harness between
stop light switch connectors.
Connector & terminal
4 DOOR MODEL
(B65) No. 3 — No. 4:
5 DOOR MODEL
(B65) No. 1 — No. 2:
Is the resistance 1 M
:
or
more?
Go to step
6
.
Replace the stop
light switch.
6
CHECK HARNESS CONNECTOR BETWEEN
BODY INTEGRATED UNIT AND STOP LIGHT
SWITCH.
1) Turn the ignition switch to ON.
2) Measure the voltage of harness between
the body integrated unit and chassis ground.
Connector & terminal
(B280) No. 2 (+) — Chassis ground (–):
Is the voltage less than 1 V?
Go to step
7
.
Repair the short
circuit of harness
between TCM and
stop light switch.
7
CHECK POOR CONTACT.
Is there poor contact of input
signal of brake switch?
Repair the poor
contact.
Check body inte-
grated unit.
Содержание 2009 IMPREZA
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