Subaru IMPREZA GD 2007 Series Manual page 2682

asieps_tobira_IM_US.book 43 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)
Step
1 CHECK HARNESS CONNECTOR BETWEEN
TCM AND ATF TEMPERATURE SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission
and TCM.
3) Measure the resistance of harness between
TCM and transmission connector.
Connector & terminal
(B55) No. 23 — (B11) No. 11:
2 CHECK HARNESS CONNECTOR BETWEEN
TCM AND ATF TEMPERATURE SENSOR.
Measure the resistance of harness between
TCM and transmission connector.
Connector & terminal
(B55) No. 12 — (B11) No. 15:
3 CHECK ATF TEMPERATURE SENSOR.
1) Turn the ignition switch to OFF.
2) Connect the connectors to transmission and
TCM.
3) Turn the ignition switch to ON and start
engine.
4) Warm-up the transmission until the ATF
temperature exceeds 80°C (176°F).
NOTE:
If the ambient temperature is below 0°C (32°F),
drive the vehicle until the ATF reaches its oper-
ating temperature.
5) Disconnect the connector from transmis-
sion.
6) Measure the resistance between transmis-
sion connector terminals.
Connector & terminal
(T4) No. 11 — No. 15:
4 CHECK ATF TEMPERATURE SENSOR.
Measure the resistance between transmission
connector terminals.
Connector & terminal
(T4) No. 11 — No. 15:
5 CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect the connector to transmission.
2) Turn the ignition switch to ON (engine OFF).
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
Is the resistance less than 1 Ω? Go to step 2.
Is the resistance less than 1 Ω? Go to step 3.
Is the resistance 300 — 800 Ω? Go to step 4.
Does the resistance value
increase while the ATF temper-
ature decreases?
Does the ATF temperature
gradually decrease?
4AT(D)(diag)-43
Yes No
Repair the open
circuit of harness
between TCM and
transmission con-
nector.
Repair the open
circuit of harness
between TCM and
transmission con-
nector.
Go to step 6.
Go to step 5. Go to step 6.
Even if the ATF Repair the poor
temperature warn- contact.
ing light blinks, the
circuit is in normal
condition at this
time. A temporary
poor contact of
connector or har-
ness may be the
cause. Repair the
harness and poor
contact of ATF
temperature sen-
sor and transmis-
sion connector.