Subaru Legacy 2004 Service Manual page 2518

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
N: DTC P0736 REVERSE INCORRECT RATIO
DTC DETECTING CONDITION:
Vehicle speed sensor, 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 PREPARE SUBARU SELECT MONITOR.
3 CHECK ENGINE SPEED.
Compare the meter with Subaru Select Moni-
tor indications.
4 CHECK TURBINE SPEED SENSOR.
Check the indication of Subaru Select Monitor.
5 CHECK FRONT AND REAR VEHICLE
SPEED SENSOR.
6 CHECK INHIBITOR SWITCH.
7 CHECK AFTER REPAIR.
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
Is any of following DTC
detected?
' AT CAN Communication Cir-
cuit
' Engine Speed Input Circuit
Range/Performance
' Input/Turbine Speed Sensor
Circuit
' Torque Converter Turbine 2
Speed Signal Circuit 2 Mal-
function
' Output Speed Sensor Circuit
' AT Vehicle Speed Sensor
Circuit Malfunction (Rear
Wheel)
' Transmission Range Sensor
Circuit (PRNDL Input)
' PVIGN Power Supply Cir-
cuit (Low)
Do you have a Subaru Select
Monitor?
Is the indication of Subaru
Select Monitor and meter
matches?
Is the indication changes
according to acceleration,
braking and shifting?
Is the indication of Subaru
Select Monitor and meter
matches?
Is the indication of Subaru
Select Monitor and meter
matches?
Is DTC displayed?
5AT(diag)-59
Yes
Perform the diag- Go to step 2.
nosis according to
DTC.
Go to step 3. Go to step 7.
Go to step 4. Perform the diag-
nosis according to
DTC P0725.
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.
Replace the con- Temporary poor
trol valve body. contact occurs.
<Ref. to 5AT-58,
Control Valve
Body.>
No