Diagnostic Procedure with DTC.pdf

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
14.Diagnostic Procedure with Diagnostic Trouble Code (DTC)
A: DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT (PRNDL INPUT)
DTC DETECTING CONDITION:
The inhibitor switch is open or short.
TROUBLE SYMPTOM:
• Shift characteristics are erroneous.
• Shift indicator light does not match with select lever.
• Shift indicator light does not illuminate.
• N-D, N-R shock occur.
5AT(diag)-31
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
WIRING DIAGRAM:
MAIN SBF
SBF-6
NO.5
B12
3
4
BATTERY
1 2 3 4
5 6 7 8
COMBINATION
METER
i10
RANGE POSITION
/GEAR POSITION
INDICATOR
T5
1 2 3
4 5 6
7 8 9 10 11 12 13 14 15 16
29
30
E
C:
B54
A27
A26
BODY INTEGRATED UNIT
A:
i84
1 2 3 4
10 11 12 13
19 20 21
5 6 7
14 15 16
22
8 9
17 18
23 24
B20
B30
B: B280
D:
B55
1 2 3 4
10 11 12 13
19 20 21
5 6
14 15
7
16
22
8 9
17 18
23 24
B:
B280
1 2 3
4 5
6 7
8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
C4
C3
D:
D14
B55
D13
D20
TCM
i10
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
1
3
2
8
C:
B54
D4
4
D3
3
5
T3
6
4
T5
2
B12
TRANSMISSION
A:
i84
1 2
3 4
5 6
7 8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
24 25 26 27 28 29 30 31 32 33 34 35
E
AT-03286
1
Step
CHECK DTC OF TCM.
Check
Yes
No
Is DTC of AT CAN communica- Perform the diag- Go to step
2.
tion circuit displayed?
nosis according to
DTC.
5AT(diag)-32
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
CHECK INHIBITOR SWITCH.
1) Shift the select lever to shift to the “P”
range.
2) Check input signal of inhibitor SW 1 — 4
and inhibitor SW 3 monitor using Subaru
Select Monitor.
CHECK 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 between TCM con-
nector and chassis ground about the item
which indicated Low on step 3.
Connector & terminal
(B55) No. 4 — Chassis ground:
(B55) No. 3 — Chassis ground:
(B55) No. 14 — Chassis ground:
(B55) No. 13 — Chassis ground:
(B55) No. 20 — Chassis ground:
CHECK INHIBITOR SWITCH.
1) Shift the select lever to “D” range.
2) Check input signal of inhibitor SW 1 — 4
and inhibitor SW 3 monitor using Subaru
Select Monitor.
CHECK 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 and transmission connector
about the item which indicated High on step 5.
Connector & terminal
(B55) No. 4 — (B12) No. 4:
(B55) No. 3 — (B12) No. 3:
(B55) No. 14 — (B12) No. 2:
(B55) No. 13 — (B12) No. 1:
(B55) No. 20 — (B12) No. 8:
CHECK INPUT SIGNAL FOR TCM USING
CIRCUIT TESTER.
1) Turn the ignition switch to OFF.
2) Disconnect the transmission connector
(B12).
3) Connect the TCM connector.
4) Turn the ignition switch to ON.
5) Measure the voltage between TCM termi-
nals.
Connector & terminal
(B55) No. 4 — (B54) No. 19:
(B55) No. 3 — (B54) No. 19:
(B55) No. 14 — (B54) No. 19:
(B55) No. 13 — (B54) No. 19:
(B55) No. 20 — (B54) No. 19:
Check
Are all indications High?
Yes
Go to step
4.
No
Go to step
3.
2
3
Is the resistance more than 1
MΩ?
Go to step
6.
Repair the short
circuit of harness
between TCM con-
nector and chassis
ground.
4
Are all indications Low?
Go to step
6.
Go to step
5.
5
Is the resistance less than 1
Ω?
Go to step
6.
Repair the open
circuit of harness
between TCM con-
nector and trans-
mission connector.
6
Is the voltage 4 — 6 V for the Go to step
8.
inhibitor SW 1 — 4? Is the volt-
age 3.5 — 5.5 V for the inhibi-
tor SW 3 monitor?
Go to step
7.
5AT(diag)-33
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
Check
CHECK TCM I/O SIGNAL.
Is TCM I/O signal OK?
Check I/O signal of power supply, ground and
PVIGN power supply relay.
<Ref. to 5AT(diag)-11, ELECTRICAL SPECIFI-
CATION, Transmission Control Module (TCM)
I/O Signal.>
Yes
Replace the TCM.
<Ref. to 5AT-56,
Transmission Con-
trol Module
(TCM).>
No
Repair the open or
short circuit for
power supply and
ground. Perform
the diagnosis
according to DTC
for PVIGN power
supply relay.
Repair the open
circuit of harness
between control
valve body con-
nector and trans-
mission connector.
7
8
9
10
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
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 and place it on rigid
racks.
NOTE:
Raise all wheels off floor.
5) Drain the ATF.
CAUTION:
Do not drain ATF until it cools down.
6) Remove the oil pan, and disconnect the
connector from control valve body connector.
7) Measure the resistance between transmis-
sion connector and control valve body connec-
tor.
Connector & terminal
(T3) No. 4 — (T5) No. 6:
(T3) No. 3 — (T5) No. 5:
(T3) No. 2 — (T5) No. 4:
(T3) No. 1 — (T5) No. 3:
(T3) No. 8 — (T5) No. 2:
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
Measure the resistance between transmission
ground and control valve body connector.
Connector & terminal
(T5) No. 6 — Transmission ground:
(T5) No. 5 — Transmission ground:
(T5) No. 4 — Transmission ground:
(T5) No. 3 — Transmission ground:
(T5) No. 2 — Transmission ground:
CHECK POOR CONTACT.
Is the resistance less than 1
Ω?
Go to step
9.
Is the resistance more than 1
MΩ?
Go to step
10.
Repair the short
circuit of harness
between control
valve body con-
nector and trans-
mission connector.
Is there any poor contact in
Repair the poor
inhibitor SW 1 — 4 or inhibitor contact.
SW 3 monitor circuit?
Replace the con-
trol valve body.
<Ref. to 5AT-53,
Control Valve
Body.>
5AT(diag)-34
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
B: DTC P0712 TRANSMISSION FLUID TEMPERATURE SENSOR CIRCUIT LOW
INPUT
DTC DETECTING CONDITION:
Input signal circuit to ATF temperature sensor 1 is open.
TROUBLE SYMPTOM:
Excessive shift shock
WIRING DIAGRAM:
B54
B54
TCM
1 2 3 4
10 11 12 13
19 20 21
5 6
14 15
7
16
22
8
17
23
9
18
24
13
2
B11
3 4
6 7
8
9 10
11 12
13
14 15
16
17 18
19 20
5
12
B11
5
T4
1 2
T5
1 2 3
4 5 6
7 8 9 10 11 12 13 14 15 16
16
1
T5
TRANSMISSION
AT-02037
5AT(diag)-35

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