Subaru IMPREZA GD 2007 Series Manual page 2683

asieps_tobira_IM_US.book 44 ページ ２０１２年１月１７日 火曜日 午後３時４８分
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
6 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND ATF TEMPERATURE
SENSOR.
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.
NOTE:
Raise all wheels off the floor.
5) Drain the automatic transmission fluid.
CAUTION:
Do not drain ATF until it cools down.
6) Remove the oil pan, and disconnect the
connector from ATF temperature sensor con-
nector.
7) Measure the resistance of harness between
ATF temperature sensor and transmission con-
nector.
Connector & terminal
(T4) No. 11 — (AT11) No. 1:
7 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND ATF TEMPERATURE
SENSOR.
Measure the resistance of harness between
ATF temperature sensor and transmission con-
nector.
Connector & terminal
(T4) No. 15 — (AT11) No. 3:
8 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND ATF TEMPERATURE
SENSOR.
Measure the resistance of harness between
transmission connector and transmission
ground.
Connector & terminal
(T4) No. 11 — Transmission ground:
9 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND ATF TEMPERATURE
SENSOR.
Measure the resistance of harness between
transmission connector and transmission
ground.
Connector & terminal
(T4) No. 15 — Transmission ground:
Check
Is the resistance less than 1 Ω? Go to step 7.
Is the resistance less than 1 Ω? Go to step 8.
Is the resistance 1 MΩ or
more?
Is the resistance 1 MΩ or
more?
4AT(D)(diag)-44
Yes No
Repair the open
circuit of harness
between ATF tem-
perature sensor
and transmission
connector.
Repair the open
circuit of harness
between ATF tem-
perature sensor
and transmission
connector.
Go to step 9.
Repair the short
circuit of harness
between ATF tem-
perature sensor
and transmission
connector.
Replace the con- Repair the short
trol valve body. circuit of harness
<Ref. to 4AT-59, between ATF tem-
Control Valve perature sensor
Body.> and transmission
connector.