Car automatic transmission Peugeot 207

General information about automatic transmission AL4
Transmission AL4 - automatic, transverse, with four forward gears, with electronically controlled gear shifting. Gear shifting is controlled by a separate ECU. Identification plate for gearbox AL4 Attention. The gearbox...

Electronic transmission control
Gearbox control involves the elements listed below. ECU has flash memory (allowing software updates via download). Multifunctional contactor (new). Mode selector. LED display (on the dashboard), showing the position of...

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

Checking the oil pressure in the automatic transmission
Remove the air filter unit. Remove the bolt (1). Attention. Clean pressure gauge hose 1 before each use: different brands of automatic transmission oils must not be mixed with each other. Screw the connecting fitting 2...

Draining, filling and checking the level of automatic transmission oil
Pouring cylinder Drain Note. Draining the oil from the gearbox must be carried out at a temperature of at least 60°C to remove dirt suspended in the oil. Draining of the oil is partially impossible to completely drain...

Diagnosis of possible oil leaks in automatic transmission AL4
Attention. Violation of the tightness of the automatic transmission leads to its destruction. Attention. Removing the seal (13) each time results in the need to adjust the internal hydraulic unit selection lever (see...

Assignment of connector pins of automatic transmission computer AL4
ECU connector: 55-pin black

Transmission Input Shaft Speed Sensor
The speed sensor is located at the transmission input shaft, which is connected to the torque converter turbine. The sensor sends information to the transmission ECU about the input speed to the transmission. This...

Gearbox outlet speed sensor
The sensor is located on the gearbox opposite the drive gear teeth. The sensor sends information about the speed of the output shaft to the transmission ECU. Based on this information, the transmission ECU decides to...

Transmission oil temperature sensor
The hydraulic fluid temperature sensor is built into the hydraulic unit. Note. The sensor is welded directly to the internal harness of the hydraulic unit and requires the harness assembly to be replaced when it is...

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

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

Shift Sequence Solenoid Valves (EVS 1 — EVS 6)
1 - EVS 4 shift solenoid valve. 2 - EVS 3 shift solenoid valve. 3 - EVS 1 shift solenoid valve. 4 - EVS 2 gear shift solenoid valve. 5 - EVS 6 gear shift solenoid valve. 6 - EVS 5 gear shift solenoid valve....

Pressure change solenoid valves
7 - main solenoid valve for pressure change. 8 - pressure modulation solenoid valve (lock clutch). Electrovalves are built into the hydraulic unit. Solenoid valve (7) changes the pressure in the pressure line depending...

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

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

Executive element for locking the gear selector lever in the «P» position
Position lock actuator «R» built into the selector mechanism. This protection function obliges the driver to press the brake pedal to move the selector lever from the position «R» V «R». The drive is an electromagnet...

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

Multifunction switch
The multi-function switch is built into the gearbox and is actuated by the selector lever via the gear selector rod. The multifunction switch allows you to: interrupt power to the starter excitation relay if the...

Stop signal switch
Contactor «stop signal» installed on the pedal platform or on the pedal assembly (depending on vehicle). Switch «brake lights» provides: the inclusion of a downshift when exposed to the brake pedal; unlocking the...

Diagnosis of automatic transmission AL4
Attention. Before proceeding with the repair of the gearbox, perform diagnostics by reading errors from the memory of the electronic engine control unit. Note. For any damage or malfunction of the automatic...

Control of electrical connections
Check 1 (program selector) Check 2 (reversing light control) Check 3 (sound signal to move the lever to the position «R» (ignition key lock) Check 4 (oil temperature too high) If the oil temperature exceeds the limit...

Removal and installation of automatic transmission AL4
Removing Note. The gearbox is removed through the bottom of the car. Special fixtures: 1 - pliers for hose clamps of the cooling system 0165 Z; 2 - pin for connection 0338-A; 3 - fixture for holding torque converter...

Removal and installation of the hydrotransformer
Removing the torque converter Remove the gearbox (see corresponding operation). Special fixtures: 1 - handles for removing and installing torque converter 0338 V; 2 - hook for extracting the sealing collar of the torque...

Removal and installation of the contactor of position of the gear lever
Special fixtures: 1 - ball joint puller 10338 E; 2 - tool for removing the seal of the gearshift shaft 0338 N1; 3 - tool for removing the seal of the gearshift shaft 0338 N2; 4 - mandrel for installing the selector...

Removal and installation of the hydroblock and electromagnetic valves
Removing 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 oil from the automatic...

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