4AT(diag)-73
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
W: DTC P1718 CAN COMMUNICATION CIRCUIT
NOTE:
Refer to “Body Integrated Unit” for diagnosis of P1718. <Ref. to LAN(diag)-2, Basic Diagnostic Procedure.>
4
CHECK OUTPUT SIGNAL OF TCM.
1) Connect the connectors to TCM and trans-
mission.
2) Connect the Subaru Select Monitor to data
link connector.
3) Turn the ignition switch to ON.
4) Run the Subaru Select Monitor.
5) Shift the select lever to the “N” range, and
fully close the throttle pedal. (Vehicle speed is 0
km/h (0 MPH))
6) Read the data of “AWD Duty Ratio” using
Subaru Select Monitor.
Is the value approx. 5%?
Go to step
5
.
Go to step
6
.
5
CHECK OUTPUT SIGNAL OF TCM.
1) Set the select lever to the “D” range.
2) Read the data of “AWD Duty Ratio” using
Subaru Select Monitor.
Is the measured value approx.
18 — 35%?
Check the har-
nesses or connec-
tors between TCM
and transmission,
and repair the
defective part.
Go to step
6
.
6
CHECK POOR CONTACT.
Is there poor contact of transfer
duty solenoid circuit?
Repair the poor
contact.
Replace the TCM.
<Ref. to 4AT-63,
Transmission Con-
trol Module
(TCM).>
7
CHECK TRANSFER DUTY SOLENOID (IN
TRANSMISSION).
1) Lift up the vehicle.
2) Drain the automatic transmission fluid.
CAUTION:
Do not drain ATF until it cools down.
3) Remove the extension case.
4) Disconnect the connector from the transfer
solenoid.
5) Measure the resistance between transfer
duty solenoid connector and transmission
ground.
Connector & terminal
(AT2) No. 7 — Transmission ground:
Is the resistance 2.0 — 6.0
:
? Go to step
8
.
Replace the con-
trol valve body.
<Ref. to 4AT-58,
Control Valve
Body.>
8
CHECK HARNESS CONNECTOR BETWEEN
TRANSFER DUTY SOLENOID AND TRANS-
MISSION.
Measure the resistance of harness between
transfer duty solenoid and transmission con-
nector.
Connector & terminal
(T4) No. 8 — (AT2) No. 7:
Is the resistance less than 1
:
? Go to step
9
.
Repair the open
circuit of harness
between transfer
duty solenoid and
transmission con-
nector.
9
CHECK HARNESS CONNECTOR BETWEEN
TRANSFER DUTY SOLENOID AND TRANS-
MISSION.
Measure the resistance of harness between
transmission connector and transmission
ground.
Connector & terminal
(T4) No. 8 — Transmission ground:
Is the resistance 1 M
:
or
more?
Check the connec-
tors and harnesses
between transfer
duty solenoid and
transmission for
poor contact, and
repair the defective
part.
Repair short cir-
cuit of the harness
between the trans-
fer duty solenoid
and transmission
connector.
Step
Check
Yes
No
Содержание 2009 IMPREZA
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