RENAULT KANGOO 1997 KC / 1.G Foult Finding - Injection Workshop Manual

B76531.0
ELECTRONICALLY CONTROLLED HYDRAULIC SYSTEM
Fault finding - Customer Complaints38
ABS BOSCH
5.3
AFTER REPAIR Carry out a road test, then a check with the XR25 kit.
WARNING LIGHT FAULTS
ABS warning light does not illuminate for 3 seconds after ignition switched on. Chart 1
Chart 2 Permanent illumination of ABS warning light .
Chart 3
FAULTS NOTED WHEN BRAKING WITH ABS REGULATION
Locking of one or more wheels.Chart 4
Pulling.
Chart 6 Wandering.
Chart 7
Unexpected ABS operation when using special equipment
(mobile phone,CB...).
Chart 9
OTHER CASES
ABS warning light does not illuminate, computer disconnected.Chart 14
No communication with ABS computer.
Chart 15 Only consult this section after a complete check with the XR25 kit.
NOTES
ABS warning light illuminates again after engine starts.
Unexpected ABS operation at low speed and little force applied to brake.
Unexpected ABS operation on poor road surface.
Extension of brake pedal travel following a regulation phase
(with an irregular pedal when regulation begins).
Chart 5
Chart 8
Chart 10
Spongy pedal.
Brake pedal vibration.
Noise from pump, pipes or hydraulic assembly .
Chart 11
Chart 12
Chart 13 Chart 3 Temporary illumination of ABS warning light when driving.
38-20

B76531.0
ELECTRONICALLY CONTROLLED HYDRAULIC SYSTEM
Fault finding - Fault chart 38
ABS BOSCH
5.3
AFTER REPAIR Carry out a road test, then a check with the XR25 kit.
yes
ABS WARNING LIGHT DOES NOT ILLUMINATE FOR 3
SECONDS WHEN IGNITION SWITCHED ONFault chart 1
Only consult this section after a complete check with the XR25 kit.NOTES
Check condition of ABS warning light bulb
and its power supply.
Ensure continuity of connection between
track 21 of the computer connector and the
warning light (track 3 of the black
instrument panel connector).
If fault persists, check the instrument panel
operation.
Carry out an inspection of the connections
on the 31 track connector.
Replace the computer if the fault persists.
no
Check the 15A instrument panel fuse on the
passenger compartment connection unit
(if the problem affects all instrument panel
operations).
Turn off the ignition.
Disconnect the computer, then switch on
the ignition again.
Does the warning light illuminate?
38-21

B76531.0
ELECTRONICALLY CONTROLLED HYDRAULIC SYSTEM
Fault finding - Fault chart 38
ABS BOSCH
5.3
AFTER REPAIR Carry out a road test, then a check with the XR25 kit.
ABS WARNING LIGHT PERMANENTLY ILLUMINATED
WHEN IGNITION SWITCHED ON (no fault declared by
XR25)Fault chart 2
Only consult this section after a complete check with the XR25 kit.NOTES
yes
Look for a short circuit to earth of the
connection between track 10 of the R36
connector and the ABS warning light (track
3 of the black instrument panel connector).Look for a fault in the shunt or a short
circuit to earth of the connection between
track 21 of the computer connector and R36
on track 10.
no
Disconnect the computer and check the
shunt positioning in the 31 track connector
(between track 19 and track 21).
Ensure on the computer side that a shunt
opening pin is present between tracks 19
and 21 of the computer connector.
Reconnect the computer.
Check that there is continuity between
track 10 of the R36 connector on the engine
compartment side, and earth.
Is continuity ensured ?
38-22

B76531.0
ELECTRONICALLY CONTROLLED HYDRAULIC SYSTEM
Fault finding - Fault chart 38
ABS BOSCH
5.3
AFTER REPAIR Carry out a road test, then a check with the XR25 kit.
REILLUMINATION OF WARNING LIGHT AFTER STARTING THE ENGINE
TEMPORARY ILLUMINATION OF ABS WARNING LIGHT WHEN DRIVINGFault chart 3
Check the voltage of the computer power supply : 9.5 volts < correct voltage < 17.5 volts.
If necessary, carry out the following operations :
- Check the battery charge (check the charging circuit if necessary).
- Check the tightness and condition of the battery terminals.
- Check the ABS earths (tightness of two earth bolts above the ABS assembly).
Disconnect the computer and check the condition and the positioning of the shunt in the 31 track
connector (between track 19 and track 21).
Check on the computer side, the condition of the shunt opening pin.
Only consult this section after a complete check with the XR25 kit.NOTES
38-23

B76531.0
ELECTRONICALLY CONTROLLED HYDRAULIC SYSTEM
Fault finding - Fault chart 38
ABS BOSCH
5.3
AFTER REPAIR Carry out a road test, then a check with the XR25 kit.
LOCKING OF ONE OR MORE WHEELSFault chart 4
REMINDER:Wheel locking on a vehicle equipped with ABS, or tyre squeal, considered by the customer
as locking, can be linked to a normal reaction of the system and should not be systematically
considered as a fault :
- locking is allowed below 3.75 mph ( 6 km/h) (the system will not provide regulation).
- Braking with ABS regulation under very bad road conditions (high degree of tyre squeal).
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Only consult this section after a complete check with the XR25 kit.NOTES
On the other hand, if there really is wheel locking on one or more wheels, lift the vehicle so the wheels can
be turned, and check :
- a possible incorrect connection in the speed sensor connection.
• Use operations #01, #02, #03 and #04 while turning the appropriate wheel and ensure the consis-
tency of the results obtained .
• If the value measured is zero, turn the other wheels to confirm a bad electrical connection of the sen-
sors and repair the wiring.
- A possible incorrect connection of the hydraulic assembly pipes.
• Use operations G03*, G04*, G05* and G06* while applying the brake and check for the ten cycles of
unlocking/locking on the wheel concerned (consult section "Aid").
• If the ten cycles do not occur on the wheel tested, (wheel remains locked), see if they occur on ano-
ther wheel (if a bad connection is confirmed: repair).
• If the ten cycles do not occur on a wheel and the pipes are correctly connected, replace the hydraulic
assembly.
• Check the condition of the ABS targets and that they conform.
• Also check the sensor/target air gap by rotating each of the wheels :
Front 0.13 mm < air gap over one rotation < 1.96 mm.
Rear 0.03 mm < air gap over one rotation < 2.4 mm (check only possible on vehicles with four-bar
rear axles).
If the fault persists after these checks, replace the hydraulic assembly.
38-24

B76531.0
ELECTRONICALLY CONTROLLED HYDRAULIC SYSTEM
Fault finding - Fault chart 38
ABS BOSCH
5.3
AFTER REPAIR Carry out a road test, then a check with the XR25 kit.
yes
PULLINGFault chart 5
Only consult this section after a complete check with the XR25 kit.NOTES
Lift the vehicle so the wheels can be turned
and check for :
- a possible incorrect connection in the
speed sensors,
- a possible incorrect connection of the
hydraulic assembly piping.
For these two checks, consult and apply the
methods defined in Fault Chart 4.Check the
condition of the ABS targets and that they
conform. Also check the sensor/ target air
gap by rotating each wheel.
If the fault persists, replace the hydraulic
assembly.
If the pedal travel is relatively long, bleed
the brake circuit.
If it is normal, check the tyre pressure, the
front axle assembly
or possibly for leaks in the circuit.
no
Remove the 10A ABS fuse on the passenger
compartment connection unit and carry out
a road test with the ABS non-operational.
Does the fault persist under these
conditions?
38-25

B76531.0
ELECTRONICALLY CONTROLLED HYDRAULIC SYSTEM
Fault finding - Fault chart 38
ABS BOSCH
5.3
AFTER REPAIR Carry out a road test, then a check with the XR25 kit.
yes
WANDERINGFault chart 6
Remove the 10A ABS fuse in the passenger
compartment connection unit and carry out
a road test with ABS non-operational.
Does the fault persist under these
conditions?
Only consult this section after a complete check with the XR25 kit.NOTES
Normal behaviour linked to system
operation in the regulation phase
essentially because of asymmetrical grip or
poor road surface.
Handling fault not linked to ABS system.
Check the condition and conformity of
brake linings, check tyre pressures, front
axle assembly, ...
no
38-26

B76531.0
ELECTRONICALLY CONTROLLED HYDRAULIC SYSTEM
Fault finding - Fault chart 38
ABS BOSCH
5.3
AFTER REPAIR Carry out a road test, then a check with the XR25 kit.
UNEXPECTED ABS OPERATION AT LOW SPEEDS AND
WHEN LITTLE PRESSURE APPLIED TO BRAKE PEDALFault chart 7
It is possible to feel brake pedal vibrations which are linked to reactions of the system in particular
situations :
- Crossing speed bumps.
- Rear inside wheel lifts on tight bends.
If the problem is different, check the speed sensors connectors ( micro-breaks) as well as the air gaps.
Only consult this section after a complete check with the XR25 kit.NOTES
38-27

B76531.0
ELECTRONICALLY CONTROLLED HYDRAULIC SYSTEM
Fault finding - Fault chart 38
ABS BOSCH
5.3
AFTER REPAIR Carry out a road test, then a check with the XR25 kit.
UNEXPECTED ABS OPERATION
UNDER POOR ROAD CONDITIONSFault chart 8
Under poor road conditions, it is normal to feel jerky operation and vibration of the pedal and a higher
degree of tyre squeal than on a good road surface.
This results in a feeling that there is variation in efficiency, but this is normal.
Only consult this section after a complete check with the XR25 kit.NOTES
38-28

B76531.0
ELECTRONICALLY CONTROLLED HYDRAULIC SYSTEM
Fault finding - Fault chart 38
ABS BOSCH
5.3
AFTER REPAIR Carry out a road test, then a check with the XR25 kit.
UNEXPECTED ABS OPERATION WHEN USING SPECIAL
EQUIPMENT (MOBILE PHONE,CB...)Fault chart 9
Check that equipment causing the problem during use is approved.
Check that this equipment has been correctly installed without modification to the original wiring, in
particular, that of the ABS (connections to earth and + after ignition/ before ignition of the ABS are not
permitted).
Only consult this section after a complete check with the XR25 kit.NOTES
38-29