Subaru LEGACY 2006 Manual page 3577

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
1 CHECK DTC OF TCM.
2 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and
transmission.
3) Measure the resistance of harness
between TCM and transmission connector.
Connector & terminal
(B54) No. 15 — (B11) No. 13:
(B54) No. 5 — Chassis ground:
(B54) No. 14 — Chassis ground:
3 CHECK HARNESS CONNECTOR BETWEEN
TCM AND BODY HARNESS.
Measure the resistance of harness between
TCM connector and body harness.
Connector & terminal
(B54) No. 15 — Chassis ground:
4 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmis-
sion.
3) Remove the transmission connector from
bracket.
4) Lift up the vehicle and place it on rigid
racks.
NOTE:
Raise all wheels off floor.
5) Drain the ATF.
CAUTION:
Do not drain ATF until it cools down.
6) Remove the oil pan, and disconnect the
control valve body connector.
7) Measure the resistance between transmis-
sion connector and control valve body connec-
tor.
Connector & terminal
(T4) No. 13 — (T16) No. 1:
5 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
Measure the resistance between chassis
ground and control valve body connector.
Connector & terminal
(T16) No. 1 — Chassis ground:
6 CHECK LOW COAST BRAKE SOLENOID.
Measure the resistance of harness connector
between control valve body connector and
transmission ground.
Connector & terminal
(T16) No. 1 — Transmission ground:
Check
Is DTC (P0802) of the PVIGN
relay detected?
Is the resistance less than 1
Ω?
Is the resistance more than 1
MΩ?
Is the resistance less than 1
Ω?
Is the resistance more than 1
MΩ?
Is the resistance between 5 —
17 Ω?
5AT(diag)-84
Yes No
Perform the diag- <Ref. to 5AT(diag)-
nosis according to 83, Diagnostic
DTC. Procedure with
Diagnostic Trou-
ble Code (DTC).>
Go to step 3.
Repair the open
circuit of harness
between TCM con-
nector and trans-
mission connector.
Go to step 4. Repair the short
circuit of harness
between TCM con-
nector and trans-
mission connector.
Go to step 5. Repair the open
circuit of harness
between transmis-
sion connector
and control valve
body connector.
Go to step 6. Repair the short
circuit of harness
between control
valve body con-
nector and trans-
mission ground.
Go to step 7.
Replace the con-
trol valve body.
<Ref. to 5AT-53,
Control Valve
Body.>