Subaru LEGACY 2006 Manual page 3546

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
N: DTC P0736 REVERSE INCORRECT RATIO
DTC DETECTING CONDITION:
Target gear ratio and actual gear ratio do not match.
TROUBLE SYMPTOM:
• Shift point is too high or too low.
• Excessive shift shock.
• Gear is not changed.
• The vehicle does not move in D or R range with the engine running at high speed.
Step
1 CHECK DTC OF TCM.
2 CHECK TURBINE SPEED SENSOR USING
SUBARU SELECT MONITOR.
1) Lift-up the vehicle and support with rigid
racks.
NOTE:
Raise all wheels off floor.
2) Start the engine, and drive it.
3) Read the current data of torque converter
turbine speed using Subaru Select Monitor.
<Ref. to 5AT(diag)-16, READ CURRENT
DATA, OPERATION, Subaru Select Monitor.>
NOTE:
The speed difference between front and rear
wheels may light the ABS warning light, but this
does not indicate a malfunction. When AT con-
trol diagnosis is finished, perform the VDC
memory clearance procedure of on-board diag-
nostics system. <Ref. to VDC(diag)-20, CLEAR
MEMORY MODE, OPERATION, Subaru Se-
lect Monitor.>
3 CHECK FRONT AND REAR VEHICLE
SPEED SENSORS.
4 CHECK INHIBITOR SWITCH.
5 DRIVING CHECK.
1) Turn the ignition switch to OFF.
2) After restarting the engine, check that the
SPORT indicator light is not blinking, and per-
form a drive check based on the Inspection
Mode. <Ref. to 5AT(diag)-20, PROCEDURE,
Inspection Mode.>
6 CHECK AFTER REPAIR.
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
Is any DTC of the followings
detected? P0715, P0720,
P0753, P0758, P0763, P0768,
P0773, P0751, P0756, P0761,
P0766, P0771, P1706, P1710,
P1798, P1799
Does the displayed value of the
Subaru Select Monitor change
according to engine speed and
shifting?
Do the values displayed for
each of the Subaru Select
Monitor and the speedometer
substantially match?
Do the values displayed for the
Subaru Select Monitor and the
meter indicator match?
Is DTC displayed again?
Is the trouble symptom inre-
pairable (malfunction in shifting
such as excessive shift shock,
engine speed increases exces-
sively when shifting)?
5AT(diag)-53
Yes No
Perform the diag- Go to step 2.
nosis according to
DTC.
Go to step 3.
Perform the diag-
nosis according to
DTC P0715,
P1710.
Go to step 4. Perform the diag-
nosis according to
DTC P0720,
P1706.
Go to step 5. Perform the diag-
nosis according to
DTC P0705.
Check the DTC. Go to step 6.
Then, when pro-
ceeded again to
step 5, go to step
6.
Replace the trans- Temporary poor
mission assembly. contact occurs.
Check that the
harness connec-
tor is not faulty.