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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
M: DTC P0736 REVERSE INCORRECT RATIO
DTC DETECTING CONDITION:
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 is occurred.
• 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 data
link connector.
2) Turn the ignition switch to ON.
3) Read the value of accelerator pedal posi-
tion 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 "D" range and slowly
increase vehicle speed.
NOTE:
The speed difference between front and rear
wheels may light the ABS warning light or VDC
warning light, but this indicates no malfunction.
When AT control diagnosis is finished, perform
the ABS memory clearance procedure or VDC
memory clearance procedure of on-board diag-
nostics system. <Ref. to ABS(diag)-26, Clear
Memory Mode.> <Ref. to VDC(diag)-25, Clear
Memory Mode.>
3
CHECK TORQUE CONVERTER TURBINE
SPEED SENSOR.
1) Shift the select lever to "P" or "N" range.
2) Idle the engine.
Check
Does the value of accelerator
pedal position sensor change
from 0% to 100% smoothly
when throttle was operated
from fully closing to fully open-
ing?
Does the vehicle speed dis-
played by Subaru Select Moni-
tor almost correspond with
vehicle speed indicated by
combination meter?
Does the turbine speed sen-
sor revolution displayed by
Subaru Select Monitor almost
correspond with engine revolu-
tion indicated by tachometer?
4AT(diag)-62
Yes
Go to step 2.
Check the acceler-
ator pedal position
sensor circuit.
<Ref. to 4AT(diag)-
89, DTC P1708
THROTTLE POSI-
TION SENSOR
CIRCUIT LOW
INPUT, Diagnostic
Procedure with
Diagnostic Trou-
ble Code (DTC).>
Go to step 3.
Check front vehi-
cle speed sensor
circuit.
There are mal-
Check torque con-
functions in TCM,
verter turbine
TCM connector
speed sensor cir-
poor contact, or
cuit.
transmission
assembly mechan-
ical malfunction.
No
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