Car automatic transmission Peugeot 207

General information about the AL4 automatic transmission
The AL4 gearbox is automatic, transversely mounted, with four forward gears, and electronically controlled gear shifting. Gear shifting is controlled by a separate ECU. Identification plate CP AL4 Attention. The gearbox...

Electronic gearbox control
The following elements are involved in the control of the gearbox. The ECU has flash memory (allowing software updates via download). Multifunctional contactor (new). Mode selector. LED display (on the dashboard),...

Tightening torques (automatic transmission AL4)
Hydraulic unit mounting: center the hydraulic unit using bolts (11) and (12); pre-tightening - 9 N (in any order); loosen nine screws; final tightening torque 75 Nm (follow the sequence given). Note: Bolt (11) is...
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Precautions when working with automatic transmission
Work with electrical equipment elements Do not disconnect the battery while the engine is running or the ECU with the ignition on. Before connecting the connector, check the condition of the various contacts...

Checking the oil pressure in the automatic transmission
Remove the air filter unit. Loosen the bolt (1). Caution: Clean the pressure gauge hose 1 before each use: different grades of automatic transmission oils cannot be mixed with each other. Screw the connecting nipple 2...

Draining, filling and checking the level of automatic transmission oil
Filling cylinder Drain Note: The gearbox oil must be drained at a temperature of at least 60°C to remove any dirt suspended in the oil. Oil is drained partially; it is impossible to completely drain the oil from the...

Diagnostics of possible places of oil leakage of automatic transmission AL4
Attention. A breach of the automatic transmission seal will result in its destruction. Caution: Removing the seal (13) each time requires adjustment of the internal hydraulic block selection lever (see the corresponding...

Assignment of contacts of the ECU connector of automatic transmission AL4
ECU connector: 55-pin black

Gearbox primary shaft speed sensor
The speed sensor is located at the input shaft of the gearbox, which is connected to the torque converter turbine. The sensor sends information to the transmission ECU about the speed at the input to the transmission....

Gearbox Output Speed Sensor
The sensor is located on the gearbox opposite the drive gear teeth. The sensor transmits information about the output shaft speed to the gearbox ECU. Based on this information, the gearbox ECU makes a decision about...

Gearbox Oil Temperature Sensor
The working fluid temperature sensor is built into the hydraulic unit. Note: The sensor is welded directly to the internal harness of the hydraulic unit, when replacing it, it is necessary to replace the harness...

Gearbox oil level and temperature sensor
The sensor is located on the gearbox housing. The sensor allows the transmission ECU to be informed about the pressure of the working fluid in the pressure line. Based on this information, the ECU adjusts the working...

Downshift sensor («Kickdown»)
The sensor is located above the accelerator cable (from the shield side). The sensor detects the degree to which the driver presses the accelerator pedal. This information allows the ECU to downshift ("Kick-down"). The...

Shift Sequence Solenoid Valves (EVS 1 — EVS 6)
1 - electromagnetic valve for engaging the EVS 4 gear. 2 - electromagnetic valve for engaging the EVS 3 gear. 3 - electromagnetic valve for engaging the EVS 1 gear. 4 - electromagnetic valve for engaging the EVS 2 gear....

Pressure change solenoid valves
7 - main electromagnetic pressure change valve. 8 - electromagnetic pressure modulation valve (locking clutch). The solenoid valves are built into the hydraulic block. The solenoid valve (7) changes the pressure in the...

Heat Exchanger Flow Control Solenoid Valve (EPDE)
The solenoid valve is built into the gearbox (from the heat exchanger side). The electromagnetic valve allows: modulate the flow rate of the working fluid passing through the heat exchanger; optimize gearbox heating...

Gear selector lever
The range selector lever allows you to select 6 positions: "P" - parking (blocking); "R" — reverse gear; "N" — neutral (the car wheels are not blocked); "D" - automatic control (from 1st to 4th range); "3" - forced...

Actuator for locking the gear selector lever in position «P»
The locking drive in the "P" position is built into the selector mechanism. This safety feature requires the driver to press the brake pedal to move the selector lever from the "P" position to the "R" position. The...

Automatic transmission program selector
The program selector is located on the center console, to the left of the selector lever. This information informs the gearbox ECU of the driver's choice. Two switches allow you to select one of three available...

Multifunctional switch
The multifunction switch is integrated into the gearbox and is operated by the selector lever via the gear selection rod. The multifunctional switch allows you to: interrupt the power supply to the starter excitation...

Brake light switch
The brake light contactor is installed on the pedal pad or on the pedal assembly (depending on the car). The brake light switch provides: downshifting when the brake pedal is pressed; unlocking the selector lever to...

Diagnostics of automatic transmission AL4
Attention: Before starting the gearbox repair, perform diagnostics by reading errors from the memory of the engine electronic control unit. Note: If there is any damage or malfunction of the automatic transmission,...

Checking electrical connections
Check 1 (program selector) Check 2 (reversing light control) Check 3 (audible signal that the lever must be moved to the "P" position (ignition key lock) Check 4 (oil temperature too high) If the oil temperature exceeds...

Removal and installation of automatic transmission AL4
Removal Note: The gearbox is removed through the bottom of the car. Special devices: 1 - Coolant hose clamp pliers 0165 Z; 2 - finger for connection 0338-A; 3 - Torque Converter Holding Device 0336-Y; 4 - Sets of 2 Hose...

Removal and installation of the torque converter
Removal the torque converter Remove the gearbox (see the corresponding operation). Special devices: 1 - handles for removing and installing the torque converter 0338 B; 2 - hook for extracting the sealing cuff of the...

Removal and installation the gearshift lever position contactor
Special devices: 1 - Ball joint puller 10338 E; 2 - Gear shift shaft seal removal tool 0338 N1; 3 - device for removing the gearshift shaft seal 0338 N₂; 4 - mandrel for installing the selector lever seal 0338 K....

Removal and installation of the hydraulic unit and electromagnetic valves
Removal Raise and secure the vehicle on lifts. Disconnect the battery. Remove: front left wheel; front left fender liner; protection under the engine; protection under the front bumper. Drain the automatic transmission...

Removal and installation of the ECU and the automatic transmission oil level and temperature sensor AL4
Removal Note: Do not drain the transmission oil. Place the car on a lift. Disconnect the battery. Remove: decorative battery cover; air filter unit; front left wheel; front left fender liner. Remove the battery and its...

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See similar information for other Peugeot models

➨ Transmission: Automatic gearbox Peugeot 106 (1991-2003)
➨ Transmission: Automatic gearbox Peugeot 307 (2001-2008)
➨ Transmission: Automatic gearbox Peugeot 405 (1987-1997)
➨ Transmission: Automatic gearbox Peugeot 605 (1989-2000)

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