4AT(diag)-37
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
29
CHECK INPUT SIGNAL FOR TCM.
1) Shift the select lever to any range other than
“N” range.
2) Measure the voltage between TCM and
chassis ground.
Connector & terminal
(B54) No. 11 (+) — Chassis ground (–):
Is the voltage 8 V or more?
Go to step 41.
Replace the TCM.
<Ref. to 4AT-61,
Transmission Con-
trol Module
(TCM).>
30
CHECK BODY INTEGRATED UNIT.
Read the data of Shift Position from Subaru
Select Monitor. <Ref. to LAN(diag)-12, OPERA-
TION, Subaru Select Monitor.>
Is “5” displayed?
Go to step 31.
Check the body
integrated unit.
31
CHECK BODY INTEGRATED UNIT.
Check DTC of body integrated unit.
Is DTC of CAN communication
displayed?
Perform the diag-
nosis according to
DTC.
Go to step 32.
32
CHECK COMBINATION METER.
Check the “N” range indicator light. <Ref. to IDI-
5, INSPECTION, Combination Meter System.>
Is the “N” range indicator light
OK?
Go to step 41.
Replace the com-
bination meter
assembly. <Ref. to
IDI-22, Combina-
tion Meter.>
33
CHECK HARNESS CONNECTOR BETWEEN
TCM AND INHIBITOR SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM, inhib-
itor switch and combination meter.
3) Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B54) No. 11 — Chassis ground:
Is the resistance 1 M
: or
more?
Go to step 41.
Repair the ground
short circuit in “N”
range circuit.
34
CHECK HARNESS CONNECTOR BETWEEN
TCM AND INHIBITOR SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from TCM and
inhibitor switch.
3) Measure the resistance of the harness
between TCM and inhibitor switch connector.
Connector & terminal
(B54) No. 10 — (T7) No. 4:
Is the resistance less than 1
:? Go to step 35.
Repair the open
circuit of harness
between TCM and
inhibitor switch
connector, and
poor contact of the
connector.
35
CHECK INPUT SIGNAL FOR TCM.
1) Turn the ignition switch to OFF.
2) Connect the connector to TCM and inhibitor
switch.
3) Turn the ignition switch to ON.
4) Shift the select lever to “D” range.
5) Measure the voltage between TCM and
chassis ground.
Connector & terminal
(B54) No. 10 (+) — Chassis ground (–):
Is the voltage less than 1 V?
Go to step 36.
Go to step 41.
36
CHECK INPUT SIGNAL FOR TCM.
1) Shift the select lever to any range other than
“D” range.
2) Measure the voltage between TCM and
chassis ground.
Connector & terminal
(B54) No. 10 (+) — Chassis ground (–):
Is the voltage 8 V or more?
Go to step 41.
Replace the TCM.
<Ref. to 4AT-61,
Transmission Con-
trol Module
(TCM).>
37
CHECK BODY INTEGRATED UNIT.
Read the data of “Inhibitor Switch” from Subaru
Select Monitor. <Ref. to LAN(diag)-12, OPERA-
TION, Subaru Select Monitor.>
Is “4” displayed?
Go to step 38.
Check the body
integrated unit.
Step
Check
Yes
No