B3FD3PK1 - 406D9
CHECK : EMERGENCY BRAKING ASSISTANCE, SYSTEM ADAM CONTINENTAL TEVES
From 07/2000 : The emergency braking assistance system is fitted to 406 gradually; it is the ADAM system supplied by CONTINENTAL TEVES .
1 - DATA : BRAKE CONTROL ADAM
P : Master cylinder pressure (in bars) .
F : Pedal force (in dan) .
1 : Slow braking range .
2 : (emergency) rapid braking curve .
The emergency servo assistance ratio is triggered when the power at the brake pedal (force X speed) exceeds a power threshold (set at the factory) .
2 - ANOMALY(IES) - CAUSES - REMEDIES
| anomaly(ies) | causes | remedies |
|---|---|---|
| the brake control is permanently over-assisted | brake servo ADAM : the fast gear remains engaged | check : master cylinder check ADAM |
| no over-assistance during rapid braking | brake servo ADAM : the fast gear remains engaged | check : master cylinder check ADAM |
| pedal stiff | vacuum source faulty | check : VACUUM CIRCUIT |
| pedal travel long with no trace of an external leak | air in the circuit cup or valve faulty |
BLEED THE CIRCUIT REPLACE THE MASTER CYLINDER |
| significant drop in the brake fluid level with no trace of a leak | master cylinder : the brake fluid flows into the servo | REPLACE THE MASTER CYLINDER AND THE SERVO |
3 - CHECK : FIRST METHOD
The check allows triggering of the system to be checked (curve 1 and 2), but not the trigger speed threshold .
This procedure is based on analysis of the sensations detected from the system ADAM .
Drive at a speed of 50 km/h in 3 gear .
Press the brake pedal slowly until a normal urban driving type brake force is reached .
Maintain this force at a constant level until the vehicle stops .
With the vehicle stationary, maintain this force at a constant level then memorise it .
Release the brake pedal .
Drive at a speed of 50 km/h in 3 gear .
Press the brake pedal very rapidly, but with the same force as previously .
Conclusion :
If incorrect : Replace the brake servo unit .
4 - CHECK : SECOND METHOD
The check allows triggering of the system to be checked (curve 1 and 2), but not the trigger speed threshold .
4 - 1 - SPECIAL TOOLS
[1] Braking pressure checking device (-).0808-ZY .
[2] Union for caliper bleed screw (-).0808-D .
Braking tester with approved pedometer PEUGEOT .
4 - 2 - SETTING UP THE TOOLS
Protect the wings and the seats .
Remove the left-hand front wheel .
Route the larger of the two pipes (1) of the tool [1] from the engine compartment to the wheel arch .
| diameter and pitch of the bleed screws | |
|---|---|
| LUCAS caliper | M10 X 100 |
| BREMBO caliper | M10 X 100 |
LUCAS caliper :
BREMBO caliper :
Fit the tool [2] .
Connect the pipe (1) to the union [2] .
Clamp the pipe (1) to the brake hose .
WARNING : the pipe (1) must not touch the rotating part .
Bleed the checking equipment .
Fit the wheel .
Place the tool [1] in a plastic bag then place it next to the driver .
Install the pedometer .
4 - 3 - CHECK
Carry out a complete manual front brake cycle .
Move the vehicle forward then start the rear brake checking cycle .
When conditioning appears on the screen, press the brake pedal gradually until a value of 5 da.n is displayed on the pedometer .
Note the value on the tool [1] = P1 .
Release the brake pedal .
Wait for 30 seconds .
Press the brake pedal very rapidly to display a value of 5 da.n on the pedometer .
Note the value on the tool [1] = P2 .
The difference P2 - P1 must be greater than 30 bars .
If incorrect : Replace the brake servo unit .
NOTE : if the values are correct, and the triggering power threshold is considered incorrect, replace the servo .
Return the vehicle to its standard condition .