ANTI-LOCK BRAKING SYSTEM
BOSCH 8.0 ESP Vdiag No.: 08, 09, 0A, 0B, 11, 1238C
38C - 2V2 MR-372-J84-38C050$062_eng.mif
138C
BOSCH 8.0 ESP
Vdiag No.: 08, 09, 0A,
0B, 11, 12ANTI-LOCK BRAKING SYSTEM
1. SCOPE OF THIS DOCUMENT
This document presents the fault finding procedure applicable to all computers with the following specifications:
2. PREREQUISITES FOR FAULT FINDING
Documentation type
Fault finding procedures (this manual):
–Assisted fault finding (integrated into the diagnostic tool), Dialogys.
Wiring Diagrams:
–Visu-Schéma (CD-ROM), paper.
Type of diagnostic tools
–CLIP
Special tooling required
3. RECAP
Procedure
To perform fault finding on the vehicle's computers, switch on the ignition in fault finding mode.
Proceed as follows:
–vehicle's card in reader;
–press and hold the Start button (longer than 5 seconds) with start-up conditions not present,
–connect the diagnostic tool and perform the required operations.
To cut off + after ignition feed, proceed as follows:
–disconnect the diagnostic tool,
–press the Start button twice briefly (less than 3 seconds),
–ensure that the + after ignition feed has been cut off by checking that the computer indicator lights on the instrument
panel have gone out. Vehicle(s): MEGANE II, SCENIC II
Function concerned: ESPName of computer: ESP 8.0
Vdiag No.: 08, 09, 0A, 0B, 11 and 12
Special tooling required
Multimeter
Elé. 1681 Universal bornier
Note:
The left and right-hand xenon bulb computers are supplied when the dipped headlights are lit. Therefore fault
finding can only be carried out on them after the ignition has been switched on in fault finding mode (forced + after
ignition feed) and the dipped headlights have been switched on.
ESPBOSCH_V08_PRELI /ESPBOSCH_V09_PRELI /ESPBOSCH_V0A_PRELI/
ESPBOSCH_V0B_PRELI /ESPBOSCH_V11_PRELI/ESPBOSCH_V12_PRELI
MR-372-J84-38C050$062_eng.mif
ANTI-LOCK BRAKING SYSTEM
BOSCH 8.0 ESP Vdiag No.: 08, 09, 0A, 0B, 11, 1238C
38C - 63V2 MR-372-J84-38C050$744_eng.mif
BOSCH 8.0 ESP
Vdiag No.: 08, 09, 0A,
0B, 11, 12
COMMAND (continued)
SPECIAL COMMANDSAC195:Vehicle speed signal.
This command sends a speed other than 0 mph on the computer's vehicle speed wire output
(Track 33) to users of that signal (xenon bulbs, radio, sunroof).
Note:
This command has no visible effect on the dashboard speedometer needle.
Xenon bulbs: Switch on the dipped headlights and run command AC195. You should see a slight
change in the height of the headlight beam (depending on vehicle speed, the height of the beam is
adjusted to improve visibility).
–Radio: switch on the radio and check that the speed-dependent volume control function is active.
Run command AC195. During the command, you should notice the volume of the sound increase
and then decrease.
–Sunroof: this command has no visible effect on the sunroof. This command changes the activation
threshold of the anti-pinch system (the pressure exerted by the sunroof varies with vehicle speed
due to aerodynamic factors).
AC196:Request to switch on hazard warning lights.
This command sends the UCH a request to switch on the hazard warning lights to test their operation
during emergency braking (depending on UCH configuration).
SC001: Check target teeth.
This command tests the condition of the teeth on each wheel. Select command SC001 Test target
teeth. The test result should show 48 teeth.
SC006: Bleed the hydraulic unit and brake circuits.
Use this command if abnormally long brake pedal travel is noted during a road test with ABS control
(the system must have been bled beforehand by the usual procedure).
Select the SC006 "Bleed hydraulic unit and brake circuit" command and follow the instructions
given by the diagnostic tool.
