Subaru LEGACY 2006 Manual page 3429

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK TORQUE CONVERTER TURBINE
SPEED SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmis-
sion.
3) Measure the resistance between transmis-
sion connector receptacle's terminals.
Connector & terminal
(T4) No. 5 — No. 10:
2 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Disconnect the connector from TCM.
2) Measure the resistance of the harness
between TCM connector and transmission
connector.
Connector & terminal
(B54) No. 7 — (B11) No. 5:
3 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of the harness
between TCM connector and transmission
connector.
Connector & terminal
(B54) No. 16 — (B11) No. 10:
4 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of the harness
between TCM connector and chassis ground.
Connector & terminal
(B54) No. 16 — Chassis ground:
5 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of the harness
between TCM connector and chassis ground.
Connector & terminal
(B54) No. 7 — Chassis ground:
6 CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect the connectors to TCM and trans-
mission.
2) Connect the Subaru Select Monitor to the
data link connector.
3) Turn the ignition switch to ON, and the Sub-
aru Select Monitor power switch to ON.
4) Start the engine.
5) Shift the select lever to "P" or "N" range.
6) Read the data of "Turbine Revolution
Speed" using Subaru Select Monitor.
• Compare the tachometer with Subaru Select
Monitor indications.
7 CHECK POOR CONTACT.
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
Is the resistance between 450
— 650 Ω?
Is the resistance less than 1
Ω?
Is the resistance less than 1
Ω?
Is the resistance more than 1
MΩ?
Is the resistance more than 1
MΩ?
Is the revolution value same as
the tachometer reading shown
on the combination meter?
Is there poor contact in torque
converter turbine speed sensor
circuit?
4AT(diag)-43
Yes No
Go to step 2. Replace the
torque converter
turbine speed sen-
sor. <Ref. to 4AT-
54, Torque Con-
verter Turbine
Speed Sensor.>
Go to step 3. Repair the open
circuit of harness
between TCM and
transmission con-
nector.
Go to step 4.
Repair the open
circuit of harness
between TCM and
transmission con-
nector, and poor
contact of the con-
nector.
Go to step 5. Repair the short
circuit of harness
between TCM and
transmission con-
nector.
Go to step 6. Repair the short
circuit of the har-
ness between
TCM and trans-
mission connec-
tor, and poor
contact of connec-
tor.
Go to step 7.
Even if the SPORT
indicator light is
blinking, the cir-
cuit is in normal
condition at this
time. A temporary
poor contact of
connector or har-
ness may be the
cause. Repair the
harness or con-
nector in TCM and
transmission.
Repair the poor Replace the TCM.
contact. <Ref. to 4AT-62,
Transmission Con-
trol Module
(TCM).>