2009 SUBARU TRIBECA automatic

5AT(diag)-94
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
2CHECK INPUT VOLTAGE FOR PVIGN RE-
LAY.
Measure the voltage between PVIGN relay and
chassis ground.
Connector & terminal
(B357) No. 2 (+) — Chassis ground (–):
(B357) No. 3 (+) — Chassis ground (–):
Is the voltage 10 — 13 V? Go to step 3.Repair the open
circuit of harness
between fuse (No.
12) and PVIGN
relay.
3CHECK HARNESS BETWEEN PVIGN RE-
LAY OF TCM.
Measure the resistance between TCM connec-
tor and PVIGN relay connector.
Connector & terminal
(B54) No. 10 — (B357) No. 1:
(B54) No. 7 — (B357) No. 4:
(B54) No. 8 — (B357) No. 4:
Is the resistance less than 1
Ω?
Go to step 4.Repair the open
circuit of harness.
4CHECK PVIGN POWER SUPPLY CIRCUIT.
1) Turn the ignition switch to ON. (Engine
OFF)
2) Measure the voltage between TCM con-
nector and chassis ground.
Connector & terminal
(B54) No. 7 (+) — Chassis ground (–):
(B54) No. 8 (+) — Chassis ground (–):
Is the voltage 10 — 13 V? Temporary poor
contact. Recheck
the harness
between TCM and
relay. (Lightly
move the harness
and check that the
open or short cir-
cuit is not
occurred.)
Go to step 5.
5CHECK PVIGN RELAY OUTPUT OF TCM.
Measure the voltage between TCM connector
and chassis ground.
Connector & terminal
(B55) No. 11 (+) — Chassis ground (–):
Is the voltage less than 1.5 V? Replace the
PVIGN relay.
Replace the TCM.
Tr a n s m i s s i o n C o n -
trol Module
(TCM).>
Step Check Yes No

5AT(diag)-95
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AE:DTC P0957 BACKUP LIGHT RELAY CIRCUIT LOW
DTC DETECTING CONDITION:
Short circuit of back-up light relay output circuit
TROUBLE SYMPTOM:
Back-up light does not illuminate in “R” range.
WIRING DIAGRAM:
AT-03295
11
B55
B356
TCM
B55
BATTERY
MAIN SBF SBF-8
IGNITIONRELAY
BACK-UP LIGHT CIRCUIT
NO.18
E
41
32
12341011 121920 21135614 1578916 17 1822 23 24
B356
1234
BACK-UP LIGHTRELAY

5AT(diag)-96
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check Yes No
1CHECK DTC OF TCM.Is DTC of Transmission Range
Sensor Circuit (PRNDL Input)
detected?
Pe r for m t h e d ia g -
nosis according to
DTC.
Go to step 2.
2CHECK HARNESS CONNECTOR BETWEEN
TCM AND BACK-UP LIGHT RELAY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from TCM and
back-up light relay.
3) Measure the resistance of harness
between TCM connector and back-up light
relay connector.
Connector & terminal
(B55) No. 11 — (B356) No. 1:
Is the resistance less than 1
Ω?
Go to step 3.Repair the open
circuit of harness
between TCM and
transmission con-
nector, or poor
contact of connec-
tor.
3CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B55) No. 11 — Chassis ground:
Is the resistance more than 1
MΩ?
Go to step 4.Repair the short
circuit of harness
between TCM and
transmission con-
nector.
4CHECK TCM OUTPUT SIGNAL.
1) Turn the ignition switch to ON. (Engine
OFF)
2) Move the select lever to “P” range.
3) Measure the voltage between TCM con-
nector and chassis ground.
Connector & terminal
(B55) No. 11 — Chassis ground:
Is the voltage more than 10 V? Go to step 5.Replace the TCM.
Tr a n s m i s s i o n C o n -
trol Module
(TCM).>
5CHECK TCM OUTPUT SIGNAL.
1) Set the select lever to “R” range.
2) Is the voltage less than 1 V?
3) Measure the voltage between TCM con-
nector and chassis ground.
Connector & terminal
(B55) No. 11 — Chassis ground:
Is the voltage 1.0 — 2.0 V? Go to step 6.Replace the TCM.
Tr a n s m i s s i o n C o n -
trol Module
(TCM).>
6CHECK INPUT VOLTAGE FOR BACK-UP
LIGHT RELAY.
Measure the voltage between back-up light
relay and chassis ground.
Is the voltage 10 — 13 V? Replace the back-
up light relay.
Check open or
short circuit of har-
ness between fuse
(No. 18) and back-
up light relay.

5AT(diag)-97
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AF:DTC P0958 BACKUP LIGHT RELAY CIRCUIT HIGH
DTC DETECTING CONDITION:
Backup light relay malfunction, or open/short circuit in back-up light relay output circuit
TROUBLE SYMPTOM:
•Back-up light does not illuminate in “R” range.
•Back-up light always illuminate except in “R” range.
WIRING DIAGRAM:
AT-03295
11
B55
B356
TCM
B55
BATTERY
MAIN SBF SBF-8
IGNITIONRELAY
BACK-UP LIGHT CIRCUIT
NO.18
E
41
32
12341011 121920 21135614 1578916 17 1822 23 24
B356
1234
BACK-UP LIGHTRELAY

5AT(diag)-98
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check Yes No
1CHECK DTC OF TCM.Is DTC of Transmission Range
Sensor Circuit (PRNDL Input)
detected?
Pe r for m t h e d ia g -
nosis according to
DTC.
Go to step 2.
2CHECK HARNESS CONNECTOR BETWEEN
TCM AND BACK-UP LIGHT RELAY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from TCM and
back-up light relay.
3) Measure the resistance of harness
between TCM connector and back-up light
relay connector.
Connector & terminal
(B55) No. 11 — (B356) No. 1:
Is the resistance less than 1
Ω?
Go to step 3.Repair the open
circuit of harness
between TCM and
transmission con-
nector, or poor
contact of connec-
tor.
3CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B55) No. 11 — Chassis ground:
Is the resistance more than 1
MΩ?
Go to step 4.Repair the short
circuit of harness
between TCM and
transmission con-
nector.
4CHECK TCM OUTPUT SIGNAL.
1) Turn the ignition switch to ON. (Engine
OFF)
2) Move the select lever to “P” range.
3) Measure the voltage between TCM con-
nector and chassis ground.
Connector & terminal
(B55) No. 11 — Chassis ground:
Is the voltage more than 10 V? Go to step 5.Replace the TCM.
Tr a n s m i s s i o n C o n -
trol Module
(TCM).>
5CHECK TCM OUTPUT SIGNAL.
1) Set the select lever to “R” range.
2) Measure the voltage between TCM con-
nector and chassis ground.
Connector & terminal
(B55) No. 11 — Chassis ground:
Is the voltage 1.0 — 2.0 V or
below?
Go to step 6.Replace the TCM.
Tr a n s m i s s i o n C o n -
trol Module
(TCM).>
6CHECK INPUT VOLTAGE FOR BACK-UP
LIGHT RELAY.
Measure the voltage between back-up light
relay and chassis ground.
Is the voltage 10 — 13 V? Replace the back-
up light relay.
Check open or
short circuit of har-
ness between fuse
(No. 18) and back-
up light relay.

5AT(diag)-99
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AG:DTC P1601 TCM DATA COMMUNICATION FAILURE
DTC DETECTING CONDITION:
Communication does not complete between control valve memory box.
TROUBLE SYMPTOM:
Shifting quality malfunction
WIRING DIAGRAM:
AT-01800
B54TCM
B54
12789563410 11 1219 20 2113 14 15 16 17 18222324
B11
125678
131415169101112
34
17181920
6
B11
1221
11910
T58109
123 68910 11 12 13 14451516
T5
7
TRANSMISSION
Step Check Yes No
1CHECK IMPROPER CONNECTION OF
TRANSMISSION CONNECTOR.
Check loose connection on TCM connector
(B54).
Is there improper connection of
connector?
Go to step 2.Connect it
securely.
2CHECK DTC OF TCM.Is DTC of oil pressure switch
detected?
Pe r for m t h e d ia g -
nosis according to
DTC.
Go to step 3.

5AT(diag)-100
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
3CHECK TCM OUTPUT SIGNAL.
1) Turn the ignition switch to ON. (Engine
OFF)
2) Measure the voltage between TCM con-
nector and chassis ground.
Connector & terminal
(B54) No. 16 (+) — Chassis ground (–):
Is the voltage 10 — 13 V? Go to step 4.Go to step 5.
4CHECK 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 connector and transmission
connector.
Connector & terminal
(B54) No. 12 — (B11) No. 9:
(B54) No. 21 — (B11) No. 10:
(B54) No. 6 — (B11) No. 11:
Is the resistance less than 1
Ω?
Go to step 5.Repair the open
circuit of harness
between TCM and
transmission con-
nector, or poor
contact of connec-
tor.
5CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B54) No. 12 — Chassis ground:
(B54) No. 21 — Chassis ground:
(B54) No. 6 — Chassis ground:
Is the resistance more than 1
MΩ?
Go to step 6.Repair the short
circuit of harness
between TCM and
transmission con-
nector.
6CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION CONNECTOR AND CON-
TROL VALVE BODY CONNECTOR.
Measure the resistance between transmission
connector and control valve body connector.
Connector & terminal
(B11) No. 9 — (T5) No. 10:
(B11) No. 10 — (T5) No. 9:
(B11) No. 11 — (T5) No. 8:
Is the resistance less than 1
Ω?
Go to step 7.Repair the open
circuit of harness
between transmis-
sion connector
and control valve
body connector.
7CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION CONNECTOR AND CON-
TROL VALVE BODY CONNECTOR.
Measure the resistance between transmission
connector and chassis ground.
Connector & terminal
(B11) No. 9 — Chassis ground:
(B11) No. 10 — Chassis ground:
(B11) No. 11 — Chassis ground:
Is the resistance more than 1
MΩ?
Go to step 8.Repair the short
circuit of harness
between transmis-
sion connector
and control valve
body connector.
8CHECK POOR CONTACT.
NOTE:
Data communication malfunction is detected
when the malfunction occurred on inspection
area above while transmission assembly is re-
placing or “Clear Memory 2” is performing.
When the repair is performed with following di-
agnosis above, perform the “Clear Memory 2”,
and then recheck that the DTC of TCM data
communication malfunction is not detected.
Is there any open or poor con-
tact of connector (loosing ter-
minal, entering foreign matter,
damaging connector body)?
Repair the poor
contact.
Replace the trans-
mission assembly.
Automatic Trans-
mission Assem-
bly.>
Step Check Yes No

5AT(diag)-101
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AH:DTC P1706 AT VEHICLE SPEED SENSOR CIRCUIT MALFUNCTION (REAR
WHEEL)
DTC DETECTING CONDITION:
Input signal circuit of TCM is open or shorted.
TROUBLE SYMPTOM:
•Shifting quality malfunction
•Tight corner braking phenomenon is occurred.
WIRING DIAGRAM:
AT-03298
12341011 121920 21135614 1578916 17 1822 23 24
B54B55B:A:
A:
B:A:
B:
A:
B:
12345678
A16
A7B11
B12
TCM
B54
B55
12789563410 11 1219 20 2113 14 15 16 17 18222324
B11
B12
B18
B5
125678
131415169101112
34
17181920
E
REAR VEHICLESPEED SENSOR