Model: 206, 306, 307, 406 with AL4 Automatic Transmission.
Symptoms Flashing of the snow or sports light or Automatic Transmission Fault on display.
In most cases the transmission will go into the downgraded mode, or limp home. In this mode the transmission is locked in third speed to enable to continue the operation of the vehicle. This is reported by some drivers as a loss of power. The downgraded mode can be preceded by some very harsh up or down shifts. After stopping and restarting the engine, the transmission will usually return to normal operation.
Most of the time the problem appears at unpredictable intervals. Some owners experience incidences on a daily basis and others may have weeks of trouble free operation between incidents. Normally the malfunction lasts only for short periods, from a few seconds to a minute or two.
The following fault code is logged in the transmission ECU: "Intermittent fault. Pressure regulation fault, recommendation/variation"
Cause The pressure regulation fault code is triggered when the ECU senses a difference between the calculated pressure and the actual line pressure in the transmission. The pressure difference is caused by internal leakage. Internal leaks can be caused by mechanical wear, a leak between valve body and transmission casing, incorrect adjustment of the manual valve index spring. The most common cause however is the pressure regulation solenoid valve.
Diagnosis. The diagnosis is not straightforward, several operations are required to eliminate possibilities.
Transmission fluid Check the fluid level in the transmission and rectify if as required. Low or high fluid levels are equally harmfull. Save some of the drained fluid in a clean container for examination. The transmission may need to be overhauled or replaced if: The fluid sample is black and smells burnt, contains metal particles, plastic particles or friction material. New fluid is transparent. Fluid drained from a transmission that has been in operation for some time is usually dark in colour and lacks transparency, this is acceptable and not necessarily an indication of an internal fault. Caution is to be exercised with the fluid assessment.
Pressure sensor With help of the diagnostic computer check the transmission line pressure. The following parameters are expected. At idle in N: 2,4 - 2,8 bars. At idle in D: 2,8 - 3,1 bars. Under full load 2200 rpm: 11,3 - 11,7 bars. If there is no change in pressures, test the sensor and sensor supply. If a sensor is faulty a constant pressure of 6,5 bars is maintained by the system. This would also mean that the transmision would be in Limp Home Mode and that the fault is permanent. Since the problem usually is intermittent the pressure readings will check out OK most of the time. If no other problems have been found so far, continue with section 3.
Solenoid Valves Replace the pressure regulation valve and the converter lock-up valves. Make sure the 2 seals behind the valve body are correctly fitted. If necessary replace the seals. Tension the valve body bolts to 8 NM. After fitting the valve body adjust the selector index spring Adjust the multi-function switch. Before fitting the pan ensure the 2 magnets are present. Fill the transmission with new fluid and adjust the level. Update the transmission ECU software. The older software versions are not compatible with the new Borg Warner valves. The operations autlined obove will in most cases resolve the pressure regulation problem. If the problem can't be resolved follow step 4 or 5.
Valve Body Replace the valve body Transmission Replace or overhaul the transmission.
Part No. For solenoid: 2574.10 (obsolete)
Part No. For new Borg Warner valves: 2574.16
Part No. For set of magnets: 2221.17
Part No. For transmission fluid. (2 litres): 9736.22
Important reminders
Only use genuine Peugeot transmission fluid. The fluid level must be correct. The correct adjustment of the manual valve index spring is very important. Adjust the multi-function switch after the valve adjustment. Cleanliness is absolutely essential when working on the transmission.
Model: 206, 306, 307, 406 with AL4 Automatic Transmission.
Symptoms In all instances the warning light on the dash will flash, (Snow and Sport light) indicating a malfunction in the transmission or the transmission control system.
In most cases the transmission will go into the downgraded mode, or limp home. In this mode the transmission is locked in third speed to enable to continue the operation of the vehicle. This is reported by some drivers as a loss of power. The downgraded mode can be preceded by some very harsh up or down shifts.
Usually the problem appears at unpredictable intervals. It is possible to have weeks of trouble free operation between incidents. Mostly the malfunction lasts only for short periods from a few seconds to a minute or two. Normaly when the engine is stopped and restarted after the illumination of the warning light, the system will be back to operating normally.
Diagnosis DIAG2000顯示症狀為 '間斷性錯誤; 油壓控制閥' The following fault code appears in the transmission ECU: "Intermittent fault. Pressure regulation fault"
First course of action. 第一階段只upgrade電腦,規零,檢查油面 Check the software version of the transmission ECU and update if necessary. Cleare the fault codes and initialise the autoadaptives. Check the fluid level and adjust as required.
Important: It is very important for the transmission fluid to be kept at the correct level. To much fluid is as harmful as a low level. Use Peugeot fluid only. (ESSO LT 7114) Part No. 9736.22 The vehicle can now be returned to service. If there is a recurrence, follow the steps bellow.
Second course of action 如仍未解除需換零件,油壓控制閥 Only to be carried out if the first course of action was unsuccessful. Replace the 2 pressure regulation solenoids on the transmission's valve body. Ensure the 2 magnets on the transmission pan are present. If the fluid is dark, drain the transmission for a second time after completion of the work and a road test. This is to further replenish the fluid in order to improve the operation of all valves.
規定只能用ESSO 4HP20(PEUGEOT 編號 pr9736.22) 不過目前協和是用total的 原則上不需換油建議60000KM檢查一次油面補充。 自行斟酌,該份資料是以國外使用環境設定下 油量不足時車上S和雪地燈互閃時應回廠檢查,補充量=0.5L。 但是接診斷電腦有換油指示。diag 2000 將要求Oil Change to be Carried Out
以下是英國廠內部資料(有關放油,加油,檢查部分),有興趣請自行閱讀
B2CI05K1 - 206 AL4 AUTOMATIC GEARBOX
DRAINING/REFILLING/CHECK OF LEVEL OIL
1 - FOREWORD
The (AL4) autoadaptive automatic gearbox is lubricated for life .
All that is required is an oil level check at 60000 km .
Despite that, the automatic gearbox has a system for measuring oil quality .
The AL4 autoadaptive automatic gearbox ECU has an oil wear sensor .
For a given time interval, the counter increases by a certain number of units (of wear) depending on the temperature of the gearbox .
When the counter is exhausted, the gearbox ECU informs the driver of the presence of a fault by the flashing of the Sport and Snow indicator lights on the instrument panel .
Using the diagnostic equipment, the technician checks whether or not it is necessary to replace the gearbox oil .
For any operation requiring a top-up of at least 0,5 litre(s) of gearbox oil, update the oil wear counter by using the diagnostic equipment .
IMPERATIVE : in the case of an automatic gearbox oil change, following flashing of the Sport and Snow indicator lights with a message on the diagnostic equipment: Oil Change to be Carried Out = Yes + counter exhausted at units, fill in the automatic gearbox form ; see SERVICE INFORMATION(s) : repair procedure BVA 4HP20 / AL4 / MB3 number 425 and 399 .
2 - DRAINING
NOTE : gearbox in place ; partial oil change; about 4 litre(s) are removed .
Gearbox oil warm : Remove the bolt (1) (6 sides of 27 mm) .
3 - REFILLING
IMPERATIVE : use only ESSO LT 71141 fluid .
REMOVE THE CAP (2) USING THE TOOL [23] .
IMPERATIVE : do not remove the bolt (3) .
FILL THE GEARBOX USING THE EQUIPMENT [22] .
Quantity of oil to use :
after draining and refilling : 4 litre(s) after removal/refitting of hydraulic block housing : 1,5 litre(s) after draining and replacement of hydraulic block : 4,5 litre(s) after draining and replacement of converter : 5 litre(s) IMPERATIVE : for any operation requiring a top-up of at least 0,5 litre(s) of gearbox oil, update the oil wear counter by using the diagnostic equipment ; follow the oil level checking procedure .
4 - CHECK
IMPERATIVE : use only fluid ESSO LT 71141 .
4 - 1 - PRIOR CONDITIONS
Check absence of faults using the diagnostic equipment .
Place the vehicle on a four-post lift .
Gear lever in position P (Without handbrake) .
Connect the diagnostic equipment .
Select the parameter measurement function .
Remove the filler plug (2) .
IMPERATIVE : ADD 0,5 LITRE(S) OF OIL USING THE EQUIPMENT [22] .
WARNING : do not remove the bolt (3) .
Engine running : Warm the gearbox oil to a temperature between 58° C and 68 ° C .
Engine running : Remove the oil level plug (4) (6 sides of 19 mm) .
The oil runs in a trickle then drips, the level is correct .
IMPERATIVE : updating the oil wear counter .
The oil drips or does not flow at all :
stop the engine allow it to cool add 0,5 litre(s) of oil start the operation again always renew : the seal tighten the bolt (4) to 2,4 da.Nm IMPERATIVE : it is essential to add 0,5 litre(s) of oil before carrying out the