DTC 41 (P0731): 1st Gear Incorrect Ratio DTC 42 (P0732): 2nd Gear Incorrect Ratio DTC 43 (P0733): 3rd Gear Incorrect Ratio DTC 44 (P0734): 4th Gear Incorrect Ratio DTC 46 (P0736): Reverse Gear Incorrect Ratio

CIRCUIT OPERATION
The input shaft speed sensor generates a pulsed signal of 0 <=> 5 volts. The pulsed signal frequency increases with an increase in the input shaft speed.
The PCM continuously monitors the input shaft speed signal.
The output shaft speed sensor generates a pulsed signal of 0 <=> 5 volts. The pulsed signal frequency increases with an increase in the output shaft speed.
The PCM continuously monitors the output shaft speed signal.
DESCRIPTIONS OF MONITOR METHODS <DTC 41 (P0731)>
In 1st gear, if a difference between turbine revolution and that value calculated from output revolution equals or exceeds specified value, PCM judges that step-out in 1st gear has occurred.
MONITOR EXECUTION <DTC 41 (P0731)>
Continuous
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor) <DTC 41 (P0731)>

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
• DTC 27, 28 (P0705): Transmission range switch malfunction
• DTC 22 (P0715): Input shaft speed sensor malfunction
• DTC 23 (P0720): Output shaft speed sensor malfunction
• DTC 36 (P0743): Torque converter clutch solenoid malfunction
• DTC 31 (P0753): Low-reverse solenoid malfunction
• DTC 32 (P0758): Underdrive solenoid malfunction
• DTC 33 (P0763): Second solenoid malfunction
• DTC 34 (P0768): Overdrive solenoid malfunction
• DTC 54 (P1751): A/T control relay malfunction

Sensor (The sensor below is determined to be normal)
• Input shaft speed sensor
• Output shaft speed sensor
• Transmission range switch
• Torque converter clutch solenoid
• Low-reverse solenoid
• Underdrive solenoid
• Second solenoid
• Overdrive solenoid
• A/T control relay
LOGIC FLOW CHARTS (Monitor Sequence) <DTC 41 (P0731)>
DTC SET CONDITIONS <DTC 41 (P0731)>

Check Conditions
Engine speed: 450 r/min or more.
Output speed: 350 r/min or more.
Shift stage: 1st gear.
Input speed: more than 0 r/min.
Transmission fluid temperature sensor voltage: 4.5 volts or less.
Voltage of battery: 10 volts or more.
Transmission range switch rationality: only one signal.
Time after shift changing finish: 2 seconds or more.

Judgement Criteria
Output speed: [(input speed - 200 r/min) / 1st gear ratio] or less. (4 seconds)
If DTC 41 (P0731) is set consecutively four times, the transaxle is locked into 3rd gear as a fail-safe measure, and the "N" range light flashes once per second.
OBD-II DRIVE CYCLE PATTERN <DTC 41 (P0731)>
Start the engine, and drive at 20 km/h (12 mph) or more for 10 seconds, with 1st gear fixed (1st gear in sport mode).
DESCRIPTIONS OF MONITOR METHODS <DTC 42 (P0732)>
In 2nd gear, if a difference between turbine revolution and that value calculated from output revolution equals or exceeds specified value, PCM judges that step-out in 2nd gear has occurred.
MONITOR EXECUTION <DTC 42 (P0732)>
Continuous
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor) <DTC 42 (P0732)>

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
• DTC 27, 28 (P0705): Transmission range switch malfunction
• DTC 22 (P0715): Input shaft speed sensor malfunction
• DTC 23 (P0720): Output shaft speed sensor malfunction
• DTC 36 (P0743): Torque converter clutch solenoid malfunction
• DTC 31 (P0753): Low-reverse solenoid malfunction
• DTC 32 (P0758): Underdrive solenoid malfunction
• DTC 33 (P0763): Second solenoid malfunction
• DTC 34 (P0768): Overdrive solenoid malfunction
• DTC 54 (P1751): A/T control relay malfunction

Sensor (The sensor below is determined to be normal)
• Input shaft speed sensor
• Output shaft speed sensor
• Transmission range switch
• Torque converter clutch solenoid
• Low-reverse solenoid
• Underdrive solenoid
• Second solenoid
• Overdrive solenoid
• A/T control relay
LOGIC FLOW CHARTS (Monitor Sequence) <DTC 42 (P0732)>
DTC SET CONDITIONS <DTC 42 (P0732)>

Check Conditions
Engine speed: 450 r/min or more.
Output speed: 500 r/min or more.
Shift stage: 2nd gear.
Input speed: more than 0 r/min.
Transmission fluid temperature sensor voltage: 4.5 volts or less.
Voltage of battery: 10 volts or more.
Transmission range switch rationality: only one signal.
Time after shift changing finish: 2 seconds or more.

Judgement Criteria
Output speed: [(input speed + 200 r/min) / 2nd gear ratio] or more. (4 seconds)
Output speed: [(input speed - 200 r/min) / 2nd gear ratio] or less. (4 seconds)
If DTC 42 (P0732) is set consecutively four times, the transaxle is locked into 3rd gear as a fail-safe measure, and the "N" range light flashes once per second.
OBD-II DRIVE CYCLE PATTERN <DTC 42 (P0732)>
Start the engine, and drive at 30 km/h (19 mph) or more for 10 seconds, with 2nd gear fixed (2nd gear in sport mode).
DESCRIPTIONS OF MONITOR METHODS <DTC 43 (P0733)>
In 3rd gear, if a difference between turbine revolution and that value calculated from output revolution equals or exceeds specified value, PCM judges that step-out in 3rd gear has occurred.
MONITOR EXECUTION <DTC 43 (P0733)>
Continuous
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor) <DTC 43 (P0733)>

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
• DTC 27, 28 (P0705): Transmission range switch malfunction
• DTC 22 (P0715): Input shaft speed sensor malfunction
• DTC 23 (P0720): Output shaft speed sensor malfunction
• DTC 36 (P0743): Torque converter clutch solenoid malfunction
• DTC 31 (P0753): Low-reverse solenoid malfunction
• DTC 32 (P0758): Underdrive solenoid malfunction
• DTC 33 (P0763): Second solenoid malfunction
• DTC 34 (P0768): Overdrive solenoid malfunction
• DTC 54 (P1751): A/T control relay malfunction

Sensor (The sensor below is determined to be normal)
• Input shaft speed sensor
• Output shaft speed sensor
• Transmission range switch
• Torque converter clutch solenoid
• Low-reverse solenoid
• Underdrive solenoid
• Second solenoid
• Overdrive solenoid
• A/T control relay
LOGIC FLOW CHARTS (Monitor Sequence) <DTC 43 (P0733)>
DTC SET CONDITIONS <DTC 43 (P0733)>

Check Conditions
Engine speed: 450 r/min or more.
Output speed: 900 r/min or more.
Shift stage: 3rd gear.
Input speed: more than 0 r/min.
Transmission fluid temperature sensor voltage: 4.5 volts or less.
Voltage of battery: 10 volts or more.
Transmission range switch rationality: only one signal.
Time after shift changing finish: 2 seconds or more.

Judgement Criteria
Output speed: [(input speed + 200 r/min) / 3rd gear ratio] or more. (4 seconds)
Output speed: [(input speed - 200 r/min) / 3rd gear ratio] or less. (4 seconds)
If DTC 43 (P0733) is set consecutively four times, the transaxle is locked into 3rd gear as a fail-safe measure, and the "N" range light flashes once per second.
OBD-II DRIVE CYCLE PATTERN <DTC 43 (P0733)>
Start the engine, and drive at 40 km/h (25 mph) or more for 10 seconds, with 3rd gear fixed (3rd gear in sport mode).
DESCRIPTIONS OF MONITOR METHODS <DTC 44 (P0734)>
In 4th gear, if a difference between turbine revolution and that value calculated from output revolution equals or exceeds specified value, PCM judges that step-out in 4th gear has occurred.
MONITOR EXECUTION <DTC 44 (P0734)>
Continuous
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor) <DTC 44 (P0734)>

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
• DTC 27, 28 (P0705): Transmission range switch malfunction
• DTC 22 (P0715): Input shaft speed sensor malfunction
• DTC 23 (P0720): Output shaft speed sensor malfunction
• DTC 36 (P0743): Torque converter clutch solenoid malfunction
• DTC 31 (P0753): Low-reverse solenoid malfunction
• DTC 32 (P0758): Underdrive solenoid malfunction
• DTC 33 (P0763): Second solenoid malfunction
• DTC 34 (P0768): Overdrive solenoid malfunction
• DTC 54 (P1751): A/T control relay malfunction

Sensor (The sensor below is determined to be normal)
• Input shaft speed sensor
• Output shaft speed sensor
• Transmission range switch
• Torque converter clutch solenoid
• Low-reverse solenoid
• Underdrive solenoid
• Second solenoid
• Overdrive solenoid
• A/T control relay
LOGIC FLOW CHARTS (Monitor Sequence) <DTC 44 (P0734)>
DTC SET CONDITIONS <DTC 44 (P0734)>

Check Conditions
Engine speed: 450 r/min or more.
Output speed: 900 r/min or more.
Shift stage: 4th gear.
Input speed: more than 0 r/min.
Transmission fluid temperature sensor voltage: 4.5 volts or less.
Voltage of battery: 10 volts or more.
Transmission range switch rationality: only one signal.
Time after shift changing finish: 2 seconds or more.

Judgement Criteria
Output speed: [(input speed + 200 r/min) / 4th gear ratio] or more. (4 seconds)
Output speed: [(input speed - 200 r/min) / 4th gear ratio] or less. (4 seconds)
If DTC 44 (P0734) is set consecutively four times, the transaxle is locked into 3rd gear as a fail-safe measure, and the "N" range light flashes once per second.
OBD-II DRIVE CYCLE PATTERN <DTC 44 (P0734)>
Start the engine, and drive at 40 km/h (25 mph) or more for 10 seconds, with 4th gear fixed (4th gear in sport mode).
DESCRIPTIONS OF MONITOR METHODS <DTC 46 (P0736)>
In reverse gear, if a difference between turbine revolution and that value calculated from output revolution equals or exceeds specified value, PCM judges that step-out in reverse gear has occurred.
MONITOR EXECUTION <DTC 46 (P0736)>
Continuous
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor) <DTC 46 (P0736)>

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
• DTC 27, 28 (P0705): Transmission range switch malfunction
• DTC 22 (P0715): Input shaft speed sensor malfunction
• DTC 23 (P0720): Output shaft speed sensor malfunction
• DTC 36 (P0743): Torque converter clutch solenoid malfunction
• DTC 31 (P0753): Low-reverse solenoid malfunction
• DTC 32 (P0758): Underdrive solenoid malfunction
• DTC 33 (P0763): Second solenoid malfunction
• DTC 34 (P0768): Overdrive solenoid malfunction
• DTC 54 (P1751): A/T control relay malfunction

Sensor (The sensor below is determined to be normal)
• Input shaft speed sensor
• Output shaft speed sensor
• Transmission range switch
• Torque converter clutch solenoid
• Low-reverse solenoid
• Underdrive solenoid
• Second solenoid
• Overdrive solenoid
• A/T control relay
LOGIC FLOW CHARTS (Monitor Sequence) <DTC 46 (P0736)>
DTC SET CONDITIONS <DTC 46 (P0736)>

Check Conditions
Engine speed: 450 r/min or more.
Output speed: 100 r/min or more.
Shift stage: reverse gear.
Input speed: more than 0 r/min.
Transmission fluid temperature sensor voltage: 4.5 volts or less.
Voltage of battery: 10 volts or more.
Transmission range switch rationality: only one signal.
Time after shift changing finish: 0.5 second or more.

Judgement Criteria
Output speed: [(input speed + 200 r/min) / reverse gear ratio] or more. (1 second)
Output speed: [(input speed - 200 r/min) / reverse gear ratio] or less. (1 second)
If DTC 46 (P0736) is set consecutively four times, the transaxle is locked into 3rd gear as a fail-safe measure, and the "N" range light flashes once per second.
OBD-II DRIVE CYCLE PATTERN <DTC 46 (P0736)>
Start the engine, and drive in "R" range at 15 km/h (9 mph) or more for 10 seconds.
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:
Malfunction of the input shaft speed sensor
Malfunction of the output shaft speed sensor
Malfunction of the PCM
Malfunction of the underdrive clutch retainer
Malfunction of the transfer drive gear or driven gear
Malfunction of the low-reverse brake system (DTC 41 or DTC 46)
Malfunction of the underdrive clutch system (DTC 41, DTC 42, or DTC 43)
Malfunction of the second brake system (DTC 42 or DTC 44)
Malfunction of the overdrive clutch system (DTC 43 or DTC 44)
Malfunction of the reverse clutch system (DTC 46)
Electrical noise generated