Testing continuity of knock sensor wiring

[Taggy]

engine management is bringing up an error 52 on the knock sensor, so i want to test the continuity of the wiring back to the ECU, does anyone know what colour wire goes from the knock sensor up to the ECU?

[akyakapotter]

there you go taggy pin no 23 dont no the colour though

[Stu]

Its a white wire (usually faded to a cream colour) no dashes or lines. Also test the shielding surrounding the signal wire. Note, the shielding should NOT be connected to the engine block and should finish just before the plug. Its connected to the signal ground earths about 100mm up the loom from the ecu.

[Taggy]

thanks for your help guys

[Taggy]

Well there is no continuity on the mother fucker with a multimeter, unplugged the sensor and drove it and it did exactly the same thing so defo a dodgy wire. Only thing that worries me is that the car seems to drive fine otherwise and if it wasnt for the fact the light was on I wouldnt have even noticed.

Will have to rewire a new cable in and see how i get on

Edited January 22, 2014 by Taggy

[TurboTobz]

I think that the adjustments made by the knock sensors signals are very limited anyways.

Only decent way to make it safe is to have a monitor system listening for knock.

[turbo Grant]

If you put a new wire in make sure it's shield. I've got loads of microphone wire if you want me to send some up. The car will drive fine with it work. The only thing it won't do is retard the timing when the ecu detects knock

[Taggy]

I am beginning to wonder if this is the reason my car melted its pistons, i suspect the ECU has never been able to retard the timing in the past due to this duff wire and its only come to light as Grant plumed in the EML light recently! Must have had lots of detonation which melted them.

Edited January 22, 2014 by Taggy

[TurboTobz]

It's good progress then, shame it may have cost a lot if it did cause it, just a bit of an eye opener I guess!

[Taggy]

Yeah it was always on the to do list unfortunatly as the stock boxy cluster hasnt got an EML light, or an ECU for that matter lol, so Grant has now plumed my old "Choke" light to the EML, so works a treat. Its even yellow, hes a good lad!

Hey Grant I am gonna buy some track time tonight, did you buy just one session or two and which ones so i can go on with you ha!

[The Toffinator]

They definetely alter the timing a fair bit! When my knock sensor died it ran differently and had slightly different afrs!

[turbo Grant]

One thing to remember the knock sensor isn't a magic fix. If the engine is experiencing knock regularly there is a problem. When I was driving it I could hear any knock. But it's the high load, high speed situations that are the worst and I didn't boot it hard past 3rd gear.

I went for the novice sessions 9.50 and 16.04 times

[TrisK]

16:04. Your on track with my mate in his mivec colt

[Taggy]

just booked

10:24 SESSION D (ADVANCED)

1

16:06 SESSION W (NOVICE)

1

[Taggy]

Its a white wire (usually faded to a cream colour) no dashes or lines. Also test the shielding surrounding the signal wire. Note, the shielding should NOT be connected to the engine block and should finish just before the plug. Its connected to the signal ground earths about 100mm up the loom from the ecu.

Its a black wire not cream!!!

[ryan lang]

the wire on my GT was fucked aswell! had to replace the entire section from the loom near the fuel rail down to the plug

[mikey4410]

hope that phone call helped even a little bit mate

its a tricky lil bugga that knock setup.....

[Jap91]

Having the same prob with the light on..

Changed sensor and still the same..

Checking continuity 2mro

[Stu]

Interesting yours is cream, the looms I have in stock sre cream. As long as you use the right wire from the knk pin on the ecu you will be fine

[Kate]

I am having probs with my wiring too... so is the wiring meant to be white or black????