| TIBURON(GK) >2003 > G 2.7 DOHC > Automatic Transaxle System > Automatic Transaxle System>General Information (F4A42-2) |

TROUBLESHOOTING (A/T)
(F4A42 Model)
DIAGNOSIS FUNCTION
1. | Connect the Hi Scan Pro to the connector for diagnosis.
2. | Read the output diagnostic trouble codes. Then follow the remedy procedures according to the "DIAGNOSTIC TROUBLE CODE DESCRIPTION" on the following pages.
• | A maximum of 8 diagnostic trouble codes (in the sequence of occurrence) can be stored in the Random Access Memory (RAM) incorporated within the control module.
• | The same diagnostic trouble code can be stored one time only.
• | If the number of stored diagnostic trouble codes or diagnostic trouble patterns exceeds 8, already stored diagnostic trouble codes will be erased in sequence, beginning with the oldest.
• | Do not disconnect the battery until all diagnostic trouble codes or diagnostic trouble patterns have been read out, because all stored diagnostic trouble codes or diagnostic trouble patterns will be cancelled when the battery is disconnected.
3. | If the fail-safe system is activated and the transaxle is locked in third gear, the diagnostic trouble code in the Fail-safe code description will be stored in the RAM. Three of these diagnostic trouble codes can be stored.
4. | The cancellation will occur if, with the transaxle locked in third gear, the ignition key is turned to the OFF position, but the diagnostic trouble code is stored in the RAM.
5. | Memorization.
A. | Up to 8 diagnosis items and 3 fail-safe items can be memorized.
B. | If the memory capacity is exceeded, diagnosis and fail-safe items in the memory are overwritten, starting with the oldest.
C. | No code can be memorized more than once.
6. | Diagnosis Code Deletion.
(1) | Automatic Deletion All diagnosis codes are deleted from memory the 200 th time the ATF temperature reaches 50°C after memorization of the most recent diagnosis code.
(2) | Forced Deletion Memorized diagnosis codes can be deleted using the scan-tool, provided the following conditions are satisfied :
A. | The ignition switch is ON
B. | There is no detection pulse from the crank angle sensor
C. | There is no detection pulse from the output shaft speed sensor
D. | There is no detection pulse from the vehicle speed sensor
E. | The fail-safe function is not operational
ROAD TEST
No. | Condition | Operation | Judgment value | Check item
1 | Ignition switch : OFF | Ignition switch (1) ON | Battery voltage (mV) | Control relay
2 |
• | Ignition switch : ON
• | Engine : Stopped
• | Selector lever position : P
| Selector lever position (1) P, (2) R, (3) N, (4) D | (1) P, (2) R, (3) N, (4) D | Transaxle range switch
Accelerator pedal (1) Released (2) Half depressed (3) Depressed | (1) 400~1,000 mV (2)Gradually rises from (1) (3) 4,500~5,000 mV | Throttle position sensor
Brake pedal (1) Depressed (2) Released | (1) ON (2) OFF | Stop lamp switch
3 |
• | Ignition switch : ST
• | Engine : Stopped
| Starting test with lever P or N range | Starting should be possible | Starting possible or impossible
4 | Warming up | Drive for 15 minutes or more so that the automatic fluid temperature becomes 70~90°C | Gradually rises to 70~90°C | Oil temperature sensor
5 |
• | Engine : Idling
• | Selector lever position : N
| A/C switch (1) ON (2) OFF | (1) ON (2) OFF | Triple pressure switch
Accelerator pedal (1) Released (2) Half depressed | (1) ON (2) OFF | Idle position switch
(1) 600~925 rpm (2) Gradually rises from (1)
(1) Data changes | Communication with engine-ECU
Selector lever position (1) N→D (2) N→R | Should be no abnormal shifting shocks Time lag should be within 2 seconds | Malfunction when starting
6 | Selector lever position : N (Carry out on a flat and straight road) | Selector lever position and vehicle speed
1. | Idling in 1st gear (Vehicle stopped)
2. | Driving at constant speed of 20 km/h in 1st gear
3. | Driving at constant speed of 30 km/h in 2nd gear
4. | Driving at 50 km/h in 3rd gear with accelerator fully closed
5. | Driving at constant speed of 50 km/h in 4th gear (Each condition should be maintained for 10 seconds or more)
| (2) 1st, (4) 3rd, (3) 2nd, (5) 4th | Shift condition
(2) 0%, (4) 100%, (3) 100%, (5) 100% | Low and reverse solenoid valve
(2) 0%, (4) 0%, (3) 0% (5) 100% | Underdrive solenoid valve
(2) 100%, (4) 100%, (3) 0% (5) 0% | Second solenoid valve
(2) 100%, (4) 0%, (3) 100% (5) 0% | Overdrive solenoid valve
(1) 0km/h (4) 50km/h | Vehicle speed sensor
(4) 1,800 ~ 2,100rpm | Input shaft speed sensor
(4) 1,800 ~ 2,100rpm | Output shaft speed sensor
(3) 0% (5) Approx. 70~90% | Damper clutch control solenoid valve
(3) Approx. 100~300rpm (5) Approx. 0~10rpm
7 | Selector lever position : D (Carry out on a flat and straight road) |
1. | Accelerate to 4th gear at a throttle position sensor output of 1.5V (accelerator opening angle of 30 %).
2. | Gently decelerate to a standstill.
3. | Accelerate to 4th gear at a throttle position sensor output of 2.5 V (accelerator opening angle of 50%).
4. | While driving at 60 km/h in 4th gear, shif down to 3rd gear.
5. | While driving at 40 km/h in 3rd gear, shift down to 2nd gear.
6. | While driving at 20 km/h in 2nd gear, shift down to 1st gear.
| For (1), (2) and (3), the reading should be the same as the specified output shaft torque, and no abnormal shocks should occur. For (4), (5) and (6), downshifting should occur immediately after the shifting operation is made. | Malfunction when shifting
Displaced shift points
Does not shift
Does not shift from 1 to 2 or 2 to 1
Does not shift from 2 to 3 or 3 to 2
Does not shift from 3 to 4 or 4 to 3
8 | Selector lever position : N (Carry out on a flat and straight road) | Move selector lever to R range drive at constant speed of 10km/h | The ratio between input and output shaft speed sensor data should be the same as the gear ratio when reversing. | Does not shift
DIAGNOSTIC TROUBLE CODE DESCRIPTION
DTC No | Diagnosis item | Possible cause
P1704 | Throttle position sensor | Short circuit | TPS output > 4.8 V with engine idling
P1703 | Open circuit | TPS output < 0.2V with engine not idling
P1702 | Sensor misadjustment | TPS output < 0.2V or > 1.2V with engine idling
P0713 | Fluid temperature sensor | Open circuit | Oil temperature sensor output > 4.57 V for 1 second or longer (oil temperature does not increase)
P0712 | Short circuit | Output < 0.49V for 1 second
P0725 | CKP sensor | Open circuit | No crankshaft position sensor output pulse detected for 5 seconds at vehicle speed of 25 km/h
P0715 | Input speed sensor | Short circuit/open circuit | No input speed sensor output pulse detected for > 1 second at vehicle speed of > 30 km/h
P0720 | Output speed sensor | Short circuit/open circuit | At vehicle speed of > 30 km/h, output speed sensor output < 50% of vehicle speed sensor output for > 1 second
P0703 | Stop lamp switch | Short circuit/open circuit | At vehicle speed of 6 km/h, stop lamp switch is ON continuously for 5 minutes
P0750 | LR solenoid valve | Short circuit/open circuit | With relay voltage > 10V, open or short circuit is continuously for 0.3 second
P0755 | UD solenoid valve | Short circuit/open circuit
P0760 | 2nd solenoid valve | Short circuit/open circuit
P0765 | OD solenoid valve | Short circuit/open circuit
P0743 | TCC solenoid valve | Short circuit/open circuit
P0731 | Gear shift incomplete | 1st | After gear shift, output shaft speed sensor output x gear ratio of new gear ≠ input shaft speed sensor output
P0732 | 2nd
P0733 | 3rd
P0734 | 4th
P0736 | Reverse
P1749 | Serial communication | Short circuit/open circuit | With ignition ON, battery voltage > 10V, and engine speed > 450 r/min, communication is continuously irregular for 1 second or communication error signal is received for > 4 seconds continuously
P0740 | TCC | System defect/stuck on | DCC solenoid valve drive duty ratio is 100% for 4 seconds continuously
P1723 | A/T control relay | Earth short circuit/open circuit | After ignition ON, A/T control relay voltage < 7V
P0707 | Transaxle range switch | Open circuit | No signal is continuous for > 30 seconds
P0708 | Short circuit | Above 2 kinds signals are continuous for 30 seconds
P1630 | CAN-BUS OFF | TCM Fail/open/short | Receive BUS-OFF information from CAN CONTROLLER
P1631 | CAN-TIME OUT ECM | ECM Fail/open/short | No output signal for 1.5 second
P1764 | CAN MI-COM CIRCUIT | TCM internal circuit malfunction | Communication error output is continuously for > 1 second
INSPECTION CHART FOR DIAGNOSIS CODES
Code | Diagnosis item | Probable cause
P1704 | Throttle position sensor system If the TPS output voltage is 4.8V or higher when the engine is idling, the output is judged to be too high and diagnosis code P1704 is set. If the TPS output voltage is 0.2V or lower at times other than when the engine is idling, the output is judged to be too low and diagnosis code P1703 is set. If the TPS output voltage is 0.2V or lower or if it is 1.2V or higher when the engine is idling, the TPS adjustment is judged to be incorrect and diagnosis code P1702 set. | Short circuit |
• | Malfunction of the throttle position sensor
• | Malfunction of connector
• | Malfunction of the TCM
P1703 | Open circuit
P1702 | Sensor misadjusted
P0713 | Fluid temperature sensor system If the fluid temperature sensor output voltage is 4.57V or more even after driving for 10 minutes or more (if the fluid temperature does not increase), it is judged that there is an open circuit in the fluid temperature sensor and diagnosis code P0713 is set. | Open circuit Short circuit |
• | Malfunction of the oil temperature sensor
• | Malfunction of connector
• | Malfunction of the TCM
P0712
P0725 | CKP sensor system If no output pulse is detected from the crank shaft position sensor for 5 seconds or more while driving at 25 km/h or more, it is judged that there is an open circuit in the crank shaft position sensor and diagnosis code P0725 is set. | Open circuit |
• | Malfunction of the crank angle sensor
• | Malfunction of connector
• | Malfunction of the TCM
P0715 | Input speed sensor system If no output pulse is detected from the input shaft speed sensor for 1 second or more while driving in 3rd or 4th gear at a speed of 30 km/h or more, there is judged to be an open circuit or short circuit in the input shaft speed sensor and diagnosis code P0715 is set. If diagnosis code P0715 is set four times, the transmission is locked into 3rd gear (D range) or 2nd gear as a fail-safe measure. | Short circuit/open circuit |
• | Malfunction of the input shaft speed sensor
• | Malfunction of the underdrive clutch retainer
• | Malfunction of connector
• | Malfunction of the TCM
P0720 | Output speed sensor system If the output from the output shaft speed sensor is continuously 50% lower than the vehicle speed for 1 second or more while driving in 3rd or 4th gear at a speed of 30 km/h or more, there is judged to be an open circuit or short-circuit in the output shaft speed sensor and diagnosis code P0720 is set. If diagnosis code P0720 is set four times, the transmission is locked into 3rd gear (D range) or 2nd gear as a fail-safe measure. | Short circuit/open circuit |
• | Malfunction of the outputs shaft speed sensor
• | Malfunction of connector
• | Malfunction of the TCM
• | Malfunction of the transfer drive gear or driven gear
P0703 | Stop lamp switch system If the stop lamp switch is on for 5 minutes or more while driving, it is judged that there is a short circuit in the stop lamp switch and diagnosis code P0703 is set. | Short circuit/open circuit |
• | Malfunction of the stop lamp switch
• | Malfunction of connector
• | Malfunction of the TCM
P0750 | Low and reverse solenoid valve system | Short circuit/Open circuit |
• | Malfunction of solenoid valve
• | Malfunction of connector
• | Malfunction of the TCM
P0755 | Underdrive solenoid valve system | Short circuit/Open circuit
P0760 | Second solenoid valve system | Short circuit/Open circuit
P0765 | Overdrive solenoid valve system If the resistance value for a solenoid valve is too large or too small, it is judged that there is a short circuit or an open circuit in the solenoid valve and the respective diagnosis code is set. The transmission is locked into 3rd gear as a fail-safe measure. | Short circuit/Open circuit
P0743 | Torque converter clutch solenoid valve system If the resistance value for a solenoid valve is too large or too small, it is judged that there is a short circuit or an open circuit in the solenoid valve and the respective diagnosis code is set. The transmission is locked into 3rd gear as a fail-safe measure. | Short circuit/Open circuit |
• | Malfunction of the torque converter clutch solenoid valve
• | Malfunction of connector
• | Malfunction of the TCM
P0740 | Defective system
P0731 | 1st gear ratio does not meet the specification If the output from the output shaft speed sensor multiplied by the 1st gear ratio is not the same as the output from the input shaft speed sensor after the shift to 1st gear has been completed, diagnosis code P0731 is set. If diagnosis code P0731 is set four times, the transmission is locked into 3rd gear as a fail-safe measure. |
• | Malfunction of the input shaft speed sensor
• | Malfunction of the output shaft speed sensor
• | Malfunction of the underdrive clutch retainer
• | Malfunction of the transfer drive gear or driven gear
• | Malfunction of the low and reverse brake system
• | Malfunction of the underdrive clutch system
• | Noise generated
P0732 | 2nd gear ratio does not meet the specification If the output from the output shaft speed sensor multiplied by the 2nd gear ratio is not the same as the output from the input shaft speed sensor after the shift to 3rd gear has been completed, diagnosis code P0732 is set. If diagnosis code P0732 is set four times, the transmission is locked into 3rd gear as a fail-safe measure. |
• | Malfunction of the input shaft speed sensor
• | Malfunction of the output shaft speed sensor
• | Malfunction of the underdrive clutch retainer
• | Malfunction of the transfer drive gear or driven gear
• | Malfunction of the underdrive clutch system
• | Malfunction of the second brake system
• | Noise generated
P0733 | 3rd gear ratio does not meet the specification If the output from the output shaft speed sensor multiplied by the 3rd gear ratio is not the same as the output from the input shaft speed sensor after the shift to 3rd gear has been completed, diagnosis code P0733 is set. If diagnosis code P0733 is set four times, the transmission is locked into 3rd gear as a fail-safe measure. |
• | Malfunction of the input shaft speed sensor
• | Malfunction of the output shaft speed sensor
• | Malfunction of the underdrive clutch retainer
• | Malfunction of the transfer drive gear or driven gear
• | Malfunction of the underdrive clutch system
• | Malfunction of the overdrive clutch system
• | Noise generated
P0734 | 4th gear ratio does not meet the specification If the output from the output shaft speed sensor multiplied by the 4th gear ratio is not the same as the output from the input shaft speed sensor after the shift to 4th gear has been completed, diagnosis code P0734 is set. If diagnosis code P0734 is set four times, the transmission is locked into 3rd gear as a fail-safe measure. |
• | Malfunction of the input shaft speed sensor
• | Malfunction of the output shaft speed sensor
• | Malfunction of the underdrive clutch retainer
• | Malfunction of the transfer drive gear or driven gear
• | Malfunction of the second brake system
• | Malfunction of the overdrive clutch system
• | Noise generated
P0736 | Reverse gear ratio does not meet the specification If the output from the output shaft speed sensor multiplied by the reverse gear ratio is not the same as the output from the input shaft speed sensor after the shift to reverse gear has been completed, diagnosis code P0736 is set. If diagnosis code P0736 is set four times, the transmission is locked into 3rd gear as a fail-safe measure. |
• | Malfunction of the input shaft speed sensor
• | Malfunction of the output shaft speed sensor
• | Malfunction of the underdrive clutch retainer
• | Malfunction of the transfer drive gear or driven gear
• | Malfunction of the low and reverse brake system
• | Malfunction of the reverse clutch system
• | Noise generated
P1749 | Serial communication If normal communication is not possible for a continuous period of 1 second or more when the ignition switch is at the ON position, the battery voltage is 10V or more and the engine speed is 450r/min or more, diagnosis code No.P1749 is set. Diagnosis code No.P1749 is also set if the data being received is abnormal for a continuous period of 4 seconds under the same conditions. |
• | Malfunction of connector
• | Malfunction of the ECM
• | Malfunction of the TCM
P1723 | A/T control relay system If the A/T control relay voltage is less than 7V after the ignition switch has been turned ON, it is judged that there is an open circuit or a short-circuit in the A/T control relay ground and diagnosis code P1723 is set. Then the transmission is locked into 3rd gar as a fail-safe measure. | Short circuit to ground/ Open circuit |
• | Malfunction of the A/T control relay
• | Malfunction of connector
• | Malfunction of the TCM
P0707 | Transaxle range switch No signal is continuous for > 30 seconds |
• | Malfunction of transaxle range switch
P0708 | Above 2 signals are continuous for > 30 seconds
P1630 | CAN-BUS OFF
• | No 3 speed hold fail
• | No PG-A, B fail
• | Battery voltage > 10V continuously for 0.5 second
• | No engine stop
• | Receive BUS OFF information from CAN CONTROLLER
• | TCM Fail
• | TCM side open & short
P1631 | CAN-TIME OUT ECM
• | No 3 speed hold fail
• | No PG-A, B fail
• | Battery voltage > 10V continuously for 0.5 second
• | No engine stop
• | No output signal for 1.5 second
• | ECM fail
• | ECM side open & short
P1764 | TCM CAN MI-COM
• | No 3 speed hold fail
• | No PG-A, B fail
• | Battery voltage > 10V continuously for 0.5 second
• | No engine stop
• | Communication error output is continuously for > 1 second
• | CAN MI-COM CIRCUIT
INSPECTION CHART FOR THROUBLE SYMPTOMS
Trouble symptom | Probable cause
Communication with HI-SCAN is not possible is not functioning. |
• | Malfunction of diagnosis line
• | Malfunction of connector
• | Malfunction of the TCM
Driving impossible | Starting impossible Starting is not possible when the selector lever is in P or N range. In such cases, the cause is probably a defective engine system, torque converter or oil pump. |
• | Malfunction of the engine system
• | Malfunction of the torque converter
• | Malfunction of the oil pump
Does not move forward If the vehicle does not move forward when the selector lever is shifted from N to D range while the engine is idling, the cause is probably abnormal line pressure or a malfunction of the underdrive clutch or valve body. |
• | Abnormal line pressure
• | Malfunction of the underdrive solenoid valve
• | Malfunction of the underdrive clutch
• | Malfunction of the valve body
Does not reverse If the vehicle does not reverse when the selector lever is shifted from N to R range while the engine is idling, the cause is probably abnormal pressure in the reverse clutch or low and reverse brake or a malfunction of the reverse clutch, low and reverse brake or valve body. |
• | Abnormal reverse clutch pressure
• | Abnormal low and reverse brake pressure
• | Malfunction of the low and reverse brake solenoid valve
• | Malfunction of the reverse clutch
• | Malfunction of the low and reverse brake
• | Malfunction of the valve body
Does not move (forward or reverse) If the vehicle does not move forward or reverse when the selector lever is shifted to any position while the engine is idling, the cause is probably abnormal line pressure or a malfunction of the power train, oil pump or valve body. |
• | Abnormal line pressure
• | Malfunction of power train
• | Malfunction of the oil pump
• | Malfunction of the valve body
Malfunction when starting | Engine stalling when shifting If the engine stalls when the selector lever is shifted from N to D or R range while the engine is idling, the cause is probably a malfunction of the engine system, damper clutch solenoid valve, valve body or torque converter (damper clutch malfunction). |
• | Malfunction of the engine system
• | Malfunction of the damper clutch control solenoid valve
• | Malfunction of the valve body
• | Malfunction of the torque converter
• | (Malfunction of the damper clutch)
Shocks when changing from N to D and large time lag If abnormal shocks or a time lag of 2 seconds or more occur when the selector lever is shifted from N to D range while the engine is idling, the cause is probably abnormal underdrive clutch pressure or a malfunction of the underdrive clutch, valve body. |
• | Abnormal underdrive clutch pressure
• | Abnormal low and reverse brake pressure
• | Malfunction of the underdrive solenoid valve
• | Malfunction of the valve body
• | Malfunction of the idle position switch
Shocks when changing from N to R and large time lag If abnormal shocks or a time lag of 2 seconds or more occur when the selector lever is shifted from N to R range while the engine is idling, the cause is probably abnormal reverse clutch pressure or low and reverse brake pressure, or a malfunction of the reverse clutch, low and reverse brake, valve body or idle position switch. |
• | Abnormal reverse clutch pressure
• | Abnormal low and reverse brake pressure
• | Malfunction of the low and reverse solenoid valve
• | Malfunction of the reverse clutch
• | Malfunction of the low and reverse brake
• | Malfunction of the valve body
• | Malfunction of the idle position switch
Shocks when changing from N to D, N to R and large time lag If abnormal shocks or a time lag of 2 seconds or more occur when the selector lever is shifted from N to D range and from N to R range while the engine is idling, the cause is probably abnormal line pressure or a malfunction of the oil pump or valve body. |
• | Abnormal line pressure
• | Malfunction of the oil pump
• | Malfunction of the valve body
Malfunction when shifting | Shocks and running up If shocks occur when driving due to upshifting or downshifting and the transmission speed becomes higher than the engine speed, the cause is probably abnormal line pressure or a malfunction of a solenoid valve, oil pump, valve body, brake or clutch. |
• | Abnormal line pressure
• | Malfunction of each solenoid valve
• | Malfunction of the oil pump
• | Malfunction of the valve body
• | Malfunction of each brake or each clutch
Displaced shifting points | All points If all shift points are displaced while driving, the cause is probably a malfunction of the output shaft speed sensor, TPS or solenoid valve. |
• | Malfunction of the output shaft speed sensor
• | Malfunction of the throttle position sensor
• | Malfunction of each solenoid valve
• | Abnormal line pressure
• | Malfunction of the valve body
• | Malfunction of the TCM
Some points If some of the shift points are displaced while driving, the cause is probably a malfunction of the valve body, or it is related to control and is not an abnormality. |
• | Malfunction of the valve body
Does not shift | No diagnosis codes If shifting does not occur while driving and no diagnosis codes are set, the cause is probably a malfunction of the transaxle range switch, or TCM |
• | Malfunction of the transaxle range
• | Malfunction of the TCM
Malfunction while driving | Poor a acceleration If acceleration is poor even if downshifting occurs while driving, the cause is probably a malfunction of the engine system, brake or clutch. |
• | Malfunction of the engine system
• | Malfunction of the brake of clutch
Malfunction while driving | Vibration If vibration occurs when driving at constant speed or when accelerating and deceleration in top range, the cause is probably abnormal damper clutch pressure or a malfunction of the engine system, damper clutch control solenoid valve, torque converter or valve body. |
• | Abnormal damper clutch pressure
• | Malfunction of the engine system
• | Malfunction of the damper clutch control solenoid valve
• | Malfunction of the torque converter
• | Malfunction of the valve body
Transaxle range switch system The cause is probably a malfunction of the inhibitor switch circuit, ignition switch circuit or a defective TCM. |
• | Malfunction of the transaxle range switch
• | Malfunction of the ignition switch
• | Malfunction of connector
• | Malfunction of the TCM
Idle position switch system The cause is probably a defective idle position switch circuit, or a defective TCM. |
• | Malfunction of the idle position switch
• | Malfunction of connector
• | Malfunction of the TCM
Triple pressure switch system The cause is probably a defective triple pressure switch circuit or a defective TCM. |
• | Malfunction of the triple pressure switch
• | Malfunction of connector
• | Malfunction of A/C system
• | Malfunction of the TCM
Vehicle speed sensor system The cause is probably a defective vehicle speed sensor circuit or a defective TCM. |
• | Malfunction of the vehicle speed sensor
• | Malfunction of connector
• | Malfunction of the TCM
ELEMENTS IN USE IN EACH GEAR
Operating element | Underdrive clutch (UD) | Reverse clutch (REV) | Overdrive clutch (OD) | Low-and reverse brake (LR) | Second brake (2nd) | One way clutch (OWC)
Selector lever position
P | Parking | - | - | - | O | - | -
R | Reverse | - | O | - | O | - | -
N | Neutral | - | - | - | O | - | -
D | 1st | O | - | - | O | - | O
2nd | O | - | - | - | O | -
3rd | O | - | O | - | - | -
4th | - | - | O | - | O | -
3 | 1st | O | - | - | O | - | O
2nd | O | - | - | - | O | -
3rd | O | - | O | - | - | -
2 | 1st | O | - | - | O | - | O
2nd | O | - | - | - | O | -
L | 1st | O | - | - | O | - | O
OPERATING ELEMENTS AND THEIR FUNCTION
Operating element | Code | Function
Underdrive clutch | UD | Connects input shaft and underdrive sun gear
Reverse clutch | REV | Connects input shaft and reverse sun gear
Overdrive clutch | OD | Connects input shaft and overdrive planetary carrier
Low-and-reverse brake | LR | Locks low-and-reverse annulus gear and overdrive planetary carrier
Second brake | 2ND | Locks reverse sun gear