Subaru IMPREZA GD 2007 Series Manual page 2698

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
M: DTC P0736 REVERSE INCORRECT RATIO
DIAGNOSIS:
Vehicle 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 occurs.
• Gear is not shifted to reverse.
• Gear position is held by fail safe function.
Step
1 CHECK ACCELERATOR PEDAL POSITION
SENSOR.
1) Connect the Subaru Select Monitor to the
data link connector.
2) Turn the ignition switch to ON.
3) Read the value of accelerator pedal position
sensor on Subaru Select Monitor display.
2 CHECK FRONT VEHICLE SPEED SENSOR.
1) Lift up the vehicle.
2) Start the engine.
3) Shift the select lever to "D" range and slowly
increase vehicle speed.
NOTE:
The speed difference between front and rear
wheels may illuminate the ABS warning light,
but this indicates no malfunction. When AT con-
trol diagnosis is finished, perform the ABS
memory clearance procedure of on-board diag-
nostics system.
3 CHECK TORQUE CONVERTER TURBINE
SPEED SENSOR.
1) Move the select lever to "P" or "N" range.
2) Idle the engine.
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
Does the value of accelerator
pedal position sensor change
from 0% to 100% smoothly
when throttle is operated from
fully closed to fully open?
Does the vehicle speed dis-
played by Subaru Select Moni-
tor roughly correspond with
vehicle speed indicated by the
combination meter?
Does the value of torque con-
verter turbine speed sensor dis-
played by Subaru Select
Monitor roughly correspond
with the value of tachometer in
combination meter?
4AT(D)(diag)-59
Yes No
Go to step 2.
Check the acceler-
ator pedal position
sensor circuit.
Go to step 3.
Check the front
vehicle speed sen-
sor circuit.
There are malfunc- Check the torque
tions in TCM, TCM converter turbine
connector poor speed sensor cir-
contact, or trans- cuit.
mission assembly
mechanical mal-
function.