Renault Modus-Braking Fault System - Page 5 - Renault Forums :: Independent Renault forum

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post #21 of 25 (permalink) Old 9th June 2016
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Re: Renault Modus-Braking Fault System

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Originally Posted by Mihai Stefanescu View Post
Hi again. i made some checks:
1. with engine on after 5 minutes-14,48V(without electrical consumers)
2. with engine on + direct from alternator and - from body - 14,50V(without electrical consumers)
3. with engine on and (rear heat screen,AC half power, fog light,Xenon, Radio- All on!)- 14,44V
4. after all, engine off on the battery was-13.06V

What do you think? Exchange must alternator? Or have just changed the alternator regulator?
Those figures are slightly high. However your reading with the engine off is also high (there are six 2.1V cells in a car battery - making 12.6max). It is possible your meter is not accurate. Can you check with another just to be sure.

When I say "I WILL THINK ABOUT IT", I really mean that I don't know my wife's opinion yet.
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post #22 of 25 (permalink) Old 9th June 2016
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Re: Renault Modus-Braking Fault System

Disconnect the plug from the abs unit
You will see 4 pinouts, and two lines of pinouts
As you look at the plug this is the sequence that you see

5 6 7 8 9 10 11 12 13 14 15
1 2 3 4
16 17 18 19 20 21 22 23 24 25 26


Pin, 1, pump earth
2, pump motor supply
3, solenoid valve supply
4, solenoid valve and computer earth
5, front left hand speed sensor supply
6 rear left hand speed sensor supply
7, not used
8, rear right hand speed sensor supply
9, front right hand speed sensor supply
10, front right hand speed sensor signal
11, kline
12, not used
13, not used
14, not used
15 multiplex line L(OW)
16, front left hand speed sensor supply
17 rear left hand speed sensor signal
18, computer supply
19, rear right hand speed sensor signal
20, brake pedal close contact
21, not used
22, not used
23, vehicle speed wire connection
24 not used
25 not used
26 multiplex line H(IGH)
This should allow you to check all the wiring circuits.
All below tests done from the multi plug, with the multi plug disconnected,..

Front right hand wheel sensor Pin1 and pin 10, meter on ohms reading less than 1 ohm.
Pin 2 and 9 meter on ohms reading less than 1 ohm

Rear right hand wheel sensor pin 1 and pin 19, less than 1 ohm.
Pin 2 and 8 less than 1 ohm.

Rear left wheel sensor test
Pin 1 to pin 17 less than 1 ohm
Pin 2 to pin 6 less than 1 ohm

Front left wheel sensor
Pin 1 to pin 5 less than 1 ohm
Pin 2 to pin 16 less than 1 ohm..


The 1 2 3 4 has been moved in the thread,
should be able to work it out its the 4 pins, then the two rows

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post #23 of 25 (permalink) Old 2nd August 2016 Thread Starter
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Re: Renault Modus-Braking Fault System

hello again. Back with my problem! it seems that the problem is somewhere in the electrical circuit. the wires that go from the fuse box under the hood. Can you help me with a sketch / electrical diagram that can identify and check them with the multimeter?
Thank you in advance!!
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post #24 of 25 (permalink) Old 2nd August 2016
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Re: Renault Modus-Braking Fault System

can you explain what you mean,,
In what respect is it a fusebox fault,, do you mean, no power going to the abs ecu and you are after these lines to test.....

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post #25 of 25 (permalink) Old 3rd August 2016 Thread Starter
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Re: Renault Modus-Braking Fault System

I checked the ABS sensors from each wheel. I cleaned and I replaced one that was jaded! then disappeared errors. satisfied and happy! After a journey of 400 miles I saw no longer xenon bulb function on the left side.
I took down the battery, I checked the fuse box in the engine. I removed the the headlight, checked everything, everything was ok .... after began to work !!! but reappeared errors.
... So I think I have contact imperfect, reappeared after I moved and relocated wires.

During these checks, I found: in the past, someone working on the electrical wires. no longer had the original black insulation!
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