Subaru LEGACY 2006 Manual page 3504

asieps_tobira.book 24 ページ ２００９年１０月２６日 月曜日 午前９時１６分
Diagnostic Procedure for Subaru Select Monitor Communication
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
1 CHECK INSTALLATION OF TCM CONNEC-
TOR.
Turn the ignition switch to OFF.
2 CHECK SUBARU SELECT MONITOR POW-
ER SUPPLY CIRCUIT.
Measure the voltage between data link con-
nector and chassis ground.
Connector & terminal
(B40) No. 1 (+) — Chassis ground (–):
3 CHECK SUBARU SELECT MONITOR
GROUND CIRCUIT.
1) Disconnect the connectors from ECM.
2) Measure the resistance of harness
between data link connector and ECM.
Connector & terminal
(B40) No. 12 — (F136) No. 6:
(B40) No. 13 — (F136) No. 6:
4 CHECK SUBARU SELECT MONITOR
GROUND CIRCUIT.
Measure the resistance of harness between
data link connector and chassis ground.
Connector & terminal
(B40) No. 12 — Chassis ground:
(B40) No. 13 — Chassis ground:
5 CHECK ENGINE GROUND CIRCUIT.
Check the engine ground circuit. <Ref. to
4AT(diag)-79, DTC P1708 THROTTLE POSI-
TION SENSOR CIRCUIT LOW INPUT, Diag-
nostic Procedure with Diagnostic Trouble Code
(DTC).>
6 CHECK COMMUNICATION OF SUBARU SE-
LECT MONITOR.
1) Turn the ignition switch to ON.
2) Using the Subaru Select Monitor, check
whether communication to transmission sys-
tem can be executed normally.
7 CHECK COMMUNICATION OF SUBARU SE-
LECT MONITOR.
1) Turn the ignition switch to OFF.
2) Disconnect the TCM connector.
3) Check whether communication to engine
system can be executed normally.
8 CHECK COMMUNICATION OF SUBARU SE-
LECT MONITOR.
1) Turn the ignition switch to OFF.
2) Connect the TCM connector.
3) Disconnect the connectors of TPM control
unit, airbag control module, body integrated
unit, and ABSCM&H/U.
CAUTION:
When disconnecting the connector from air-
bag control module, always follow the pre-
cautions on AB section. <Ref. to AB-6,
CAUTION, General Description.>
4) Check whether communication to transmis-
sion system can be executed normally.
Check
Is TCM connector connected
to TCM?
Is the voltage more than 10 V? Go to step 3.
Is the resistance less than 1
Ω?
Is the resistance more than 1
MΩ?
Is the engine ground circuit
normal?
Is the name of system dis-
played on Subaru Select Moni-
tor?
Is the name of system dis-
played on Subaru Select Moni-
tor?
Is the name of system dis-
played on Subaru Select Moni-
tor?
4AT(diag)-24
Yes No
Go to step 2. Connect the TCM
connector to TCM.
Repair harness
connector
between the bat-
tery and data link
connector, and
poor contact of the
connector.
Go to step 4. Repair the open
circuit of harness
between data link
connector and
ECM.
Go to step 5.
Repair the short
circuit of harness
between data link
connector and
ground terminals.
Go to step 6. Repair ground cir-
cuit of ECM.
Go to step 11. Go to step 7.
Go to step 9. Go to step 8.
Go to step 9.
Check each con-
trol module.