2004-2007 Renault Modus Service & Repair Manual

3 Chassis V2 MR-387-X77-38C050$TOC.mif V2 38C "The repair procedures given by the manufacturer in this document are based on the technical specifications current when it was prepared. The procedures may be modified as a result of changes introduced by the manufacturer in the production of the various component units and accessories from which his vehicles are constructed." V2 All rights reserved by Renault s.a.s. Edition Anglaise Copying or translating, in part or in full, of this document or use of the service part reference numbering system is forbidden without the prior written authority of Renault s.a.s. © Renault s.a.s. 2007 ANTI-LOCK BRAKING SYSTEM BOSCH 8.1 ESP Vdiag No.: 16 Fault finding - Introduction 38C - 2 Fault finding - System operation 38C - 7 Fault finding - Allocation of computer tracks 38C - 9 Fault finding - Replacement of components 38C - 11 Fault finding - Configurations and programming 38C - 12 Fault finding - Fault summary table 38C - 14 Fault finding - Interpretation of faults 38C - 15 Fault finding - Conformity check 38C - 51 Diagnostic - Summary table of statuses and parameters 38C - 52 Fault finding - Interpretation of statuses 38C - 53 Fault finding - Dealing with computer statuses and parameters 38C - 56 Fault finding - Dealing with command modes 38C - 58 Fault finding - Customer complaints 38C - 61 Fault finding - Fault Finding Chart 38C - 63

38C - 2 ANTI-LOCK BRAKING SYSTEM Fault finding - Introduction 38C V2 MR-387-X77-38C050$062.mif 138C BOSCH 8.1 ESP Vdiag No.: 16 ANTI-LOCK BRAKING SYSTEM Fault finding - Introduction 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 Vehicle(s): Modus Function concerned: BOSCH ESP 8.1 Name of computer: ESP 8.1 Program No.: VDIAG No: 16 Special tooling required Multimeter MR-387-X77-38C050$062.mif

38C - 3 ANTI-LOCK BRAKING SYSTEM Fault finding - Introduction 38C V2 MR-387-X77-38C050$062.mif BOSCH 8.1 ESP Vdiag No.: 16 3. RECAP Procedure To run fault finding on the vehicle computers, switch on the ignition. Faults Faults are declared as either present or stored (depending on whether they appeared in a certain context and have disappeared since, or whether they remain present but have not been diagnosed within the current context). The present or stored status of faults should be taken into consideration when the diagnostic tool is switched on after the + after ignition feed (without any system components being active). For a present fault, apply the procedure described in the Interpretation of faults section. For a stored fault , note the faults displayed and apply the instructions in the Notes section. If the fault is confirmed when the instructions in the Notes section are applied, the fault is present. Deal with the fault If the fault is not confirmed, check: – the electrical lines which correspond to the fault, – the connectors for these lines (for oxidation, bent pins, etc.), – the resistance of the component detected as faulty, – the condition of the wires (melted or split insulation, wear). Conformity check The aim of the conformity check is to check statuses and parameters that do not produce a fault display on the diagnostic tool when they are inconsistent. Therefore, this stage is used to: – carry out fault finding on faults that do not have a fault display, and which may correspond to a customer complaint. – check that the system is operating correctly and that there is no risk of a fault recurring after repairs. This section gives the fault finding procedures for statuses and parameters and the conditions for checking them. If a status is not behaving normally or a parameter is outside the permitted tolerance values, consult the corresponding fault finding page. Customer complaints - Fault finding chart If the test with the diagnostic tool is OK but the customer complaint is still present, the fault should be processed by customer complaint. A summary of the overall procedure to follow is provided on the following page in the form of a flow chart.

38C - 4 ANTI-LOCK BRAKING SYSTEM Fault finding - Introduction 38C V2 MR-387-X77-38C050$062.mif BOSCH 8.1 ESP Vdiag No.: 16 4. FAULT FINDING PROCEDURE Check the battery charge and the condition of the fuses Print the system fault finding log (available on CLIP and in the Workshop Repair Manual or Technical Note) Connect CLIP no Dialogue with computer? yes Read the faults no Faults present yes Deal with present faults Deal with stored faults no The cause is still present Fault solved yes Refer to ALP No. 1 Conformity check no The cause is still present Fault solved Use Fault Finding Charts (ALPs) no The cause is still present Fault solved Contact the Techline with the completed fault finding log

38C - 5 ANTI-LOCK BRAKING SYSTEM Fault finding - Introduction 38C V2 MR-387-X77-38C050$062.mif BOSCH 8.1 ESP Vdiag No.: 16 4. FAULT FINDING PROCEDURE (continued) Wiring check Fault finding problems Disconnecting the connectors and/or manipulating the wiring harness may temporarily remove the cause of a fault. Electrical measurements of voltage, resistance and insulation are generally correct, especially if the fault is not present when the analysis is made (stored fault). Visual inspection Look for damage under the bonnet and in the passenger compartment. Carefully check the fuses, insulators and wiring harness routing. Look for signs of oxidation. Tactile inspection While manipulating the wiring harness, use the diagnostic tool to note any change in fault status from stored to present. Make sure that the connectors are properly locked. Apply light pressure to the connectors. Twist the wiring harness. If there is a change in status, try to locate the source of the fault. Inspection of each component Disconnect the connectors and check the appearance of the clips and tabs, as well as their crimping (no crimping on the insulating section). Make sure that the clips and tabs are properly locked in the sockets. Make sure that no clips or tabs have been dislodged during connection. Check the clip contact pressure using an appropriate model of tab. Resistance check Check the continuity of entire lines, then section by section. Look for a short circuit to earth, to + 12 V or to another wire. If a fault is detected, repair or replace the wiring harness.

38C - 6 ANTI-LOCK BRAKING SYSTEM Fault finding - Introduction 38C V2 MR-387-X77-38C050$062.mif BOSCH 8.1 ESP Vdiag No.: 16 5. FAULT FINDING LOG You will always be asked for this log: – when requesting technical assistance from Techline, – for approval requests when replacing parts for which approval is mandatory, – to be attached to monitored parts for which reimbursement is requested. The log is needed for warranty reimbursement, and enables better analysis of the parts removed. 6. SAFETY ADVICE Safety rules must be observed whenever work is carried out on a component to prevent physical damage or human injury: – check the battery voltage to avoid incorrect operation of computer functions, – Use the proper tools. It is forbidden to carry out a road test while dialogue is still established between the diagnostic tool and the computer, as the anti-lock braking system and braking distribution functions are deactivated. Braking pressure is identical on both vehicle axles (risk of a spin under heavy braking). IMPORTANT IMPORTANT Any fault on a complex system requires thorough fault finding with the appropriate tools. The FAULT FINDING LOG, which should be completed during the procedure, enables you to keep track of the procedure which is carried out. It is an essential document when consulting the manufacturer. IT IS THEREFORE MANDATORY TO FILL OUT A FAULT FINDING LOG FOR EACH FAULT FINDING PROCEDURE.

38C - 7 ANTI-LOCK BRAKING SYSTEM Fault finding - System operation 38C V2 MR-387-X77-38C050$124.mif BOSCH 8.1 ESP Vdiag No.: 16 ANTI-LOCK BRAKING SYSTEM Fault finding - System operation The ESP system on this vehicle incorporates the following functions: – The ABS (anti-lock braking system). The main functions of the ABS system on this vehicle are the electronic braking distribution (EBD) between the front and the rear through the regulation of rear wheel spinning, and anti-lock braking through the regulation of spinning on all four wheels. – MSR (modulate system regulation). Traction control on the driven wheels under no load by limiting the engine braking. – ASR (traction control). It limits skidding of the drive wheels during starting or acceleration phases by limiting the engine torque and braking the wheel(s) which are skidding. – ESP (electronic stability program). Electronic stability program limiting oversteer or understeer by braking certain wheels and controlling the engine torque. – CSV (understeer control). Specific control of situations involving pronounced understeer by significant vehicle braking in conjunction with a specific dynamic stability program. – AUTOMATIC LIGHTING OF HAZARD WARNING LIGHTS. Generation on the CAN, network to the UCH, of a request for switching on the hazard warning lights in the event of braking causing a very severe deceleration (depending on national legislation). – AUTOMATIC BRAKE LIGHTS SWITCH-ON. In the event of understeer control (CSV only), the ESP computer switches on the brake lights, via a relay, to give warning of severe deceleration generated by the system (according to national legislation). The system also supplies the other computers with the vehicle speed via a wire connection for the radio and electric sunroof, and via the multiplex network for the rest of the computers. The ABS/ESP computer provides the odometry on the multiplex network for the instrument panel and navigation aid. IDENTIFICATION From the outside, two factors distinguish an ABS unit from an ABS/ESP unit: – The size of the units (the ABS/ESP unit is bigger than the ABS) unit. The ABS unit has 8 solenoid valves and the ABS/ESP unit has 12. – The number of computer tracks (the ABS computer has 26 tracks and the ABS/ESP computer has 46 tracks). MR-387-X77-38C050$124.mif

38C - 8 ANTI-LOCK BRAKING SYSTEM Fault finding - System operation 38C V2 MR-387-X77-38C050$124.mif BOSCH 8.1 ESP Vdiag No.: 16 Fault finding warning lights programming Instrument panel warning light Instrument panel message Meaning Brake faults Braking fault Brake fluid level too low in the reservoir Brake faults ABS ESP SERVICE STOP Check the ABS Electronic brake regulation and ABS not working ABS ESP SERVICE Check the ABS Function and ABS not working ESP SERVICE Check the ESP Function not working, Electronic Braking Distribution and anti-lock braking system working ESP Traction control disabled – ESP disable button pressed OR – ESP temporarily disabled after disconnection of the battery Brake faults flashing at 2 Hz ABS flashing at 2 Hz ESP flashing at 2 Hz No message ABS computer is in fault finding mode Brake faults ABS faults flashing at 8 Hz ESP flashing at 8 Hz STOP No message Tachometric and variant index not programmed Brake faults ABS ESP flashing at 8 Hz SERVICE STOP No message Variant not programmed ABS faults flashing at 8 Hz No message Tachometric index not programmed ESP flashing at 8 Hz No message ESP active ASR active Engine torque control (MSR) active Note: The STOP warning light is always accompanied by a single audible warning (1 beep).

38C - 9 ANTI-LOCK BRAKING SYSTEM Fault finding - Allocation of computer tracks 38C V2 MR-387-X77-38C050$186.mif BOSCH 8.1 ESP Vdiag No.: 16 ANTI-LOCK BRAKING SYSTEM Fault finding - Allocation of computer tracks 46-TRACK CONNECTOR Computer track Description Sensor - actuator track 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 Pump motor earth Pump motor power supply Solenoid valve supply Solenoid valves and computer earth Front left-hand speed sensor signal Rear left-hand speed sensor supply Not used Rear right-hand speed sensor supply Front right-hand speed sensor supply Front right-hand speed sensor signal K line Not used Not used Multiplex line L Combined sensor earth Yaw speed signal Not used Combined sensor reference signal Not used Lateral acceleration signal Not used Relay activation and brake light output Not used Not used Not used Front left-hand speed sensor supply Rear left-hand sensor signal Computer supply Rear right-hand speed sensor signal Brake pedal close contact Traction control (ASR)/ESP disabled input Not used Vehicle speed wire connection Not used Multiplex line H Not used Combined sensor test line Not used Not used Not used Not used Not used Not used Not used Not used Not used Output fuse board. Fuse 50A Fuse (25A) on the Protection and Switching Unit Track 1 front left-hand wheel sensor Track 2 rear left-hand wheel sensor Track 2 rear right-hand wheel sensor Track 2 front right-hand wheel sensor Track 1 front right-hand wheel sensor Track 6 combined sensor Track 4 combined sensor Track 1 combined sensor Track 5 combined sensor Track 2 brake lights on relay Track 2 front left-hand wheel sensor Track 1 rear left-hand wheel sensor Fuse board/passenger compartment relay (fuse 10A) Track 1 rear right-hand wheel sensor Track 1 brake light switch Track B1 on/off switch Track 2 combined sensor MR-387-X77-38C050$186.mif

38C - 10 ANTI-LOCK BRAKING SYSTEM Fault finding - Allocation of computer tracks 38C V2 MR-387-X77-38C050$186.mif BOSCH 8.1 ESP Vdiag No.: 16 Allocation of ESP computer connector tracks

2004-2007 Renault Modus Service & Repair Manual

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