Subaru Legacy 2005 Service Manual page 2474

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
N: DTC P0736 REVERSE INCORRECT RATIO
DTC DETECTING CONDITION:
Vehicle speed sensor, torque converter turbine speed sensor or control valve malfunction
TROUBLE SYMPTOM:
• Shift point is too high or too low.
• Excessive shift shock
• Tight corner braking phenomenon is occurred.
• Gear is not shifted to reverse.
• Gear position is held by fail safe function.
• Vehicle does not run.
Step
1
CHECK DTC OF TCM.
2
CHECK DTC OF TCM.
3
CHECK DTC OF TCM.
4
CHECK TURBINE SPEED.
Check the indication of Subaru Select Monitor.
5
CHECK FRONT AND REAR VEHICLE
SPEED SENSOR.
6
CHECK INHIBITOR SWITCH.
7
CHECK DTC OF TCM.
1) Perform the clear memory mode.
2) Perform the inspection mode. <Ref. to
5AT(diag)-21, PROCEDURE, Inspection
Mode.>
8
DRIVING CHECK.
Perform the road test. <Ref. to 5AT-31,
INSPECTION, Road Test.>
NOTE:
When performing the test, do not exceed post-
ed speed limit.
Check
Is DTC P1799 displayed at the
same time?
Is any of the DTC P0751,
P0756, P0761, P0766 dis-
played at the same time?
Is any of the DTC P0705,
P0715, P0720, P1706, P1710
displayed at the same time?
Is the indication changes
according to acceleration,
braking and shifting?
Does the value of Subaru
Select Monitor mostly match
with indication of speed meter?
Does the value of Subaru
Select Monitor match with
value of meter indicator?
Is DTC displayed?
Is malfunction corrected?
5AT(diag)-56
Yes
Perform the diag-
Go to step 2.
nosis according to
DTC.
Perform the diag-
Go to step 3.
nosis according to
DTC.
Perform the diag-
Go to step 4.
nosis according to
DTC.
Go to step 5.
Perform the diag-
nosis according to
DTC P0715,
P1710.
Go to step 6.
Perform the diag-
nosis according to
DTC P0720,
P1706.
Go to step 7.
Perform the diag-
nosis according to
DTC P0705.
Perform the diag-
Go to step 8.
nosis according to
DTC.
Temporary poor
Replace the trans-
contact occurs.
mission assembly.
Check that the
harness connec-
tor has no faulty.
No

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