Vct Controller

[rad100]

hey guys,

JUST got my msd vct controller today.

now for the wiring in..

black - ground

red - 12v, ignition

white - tach input, +5-12v signal from ignitor or coil neg terminal

grey - normally closed switch output

yellow - normally open switch output

anyone be able to tell me where to tap into?

i know black to any ground

red to a power source

tach input would come off the ecu pin no.?

any help would be good

[KiwiRS4T]

Pin 7

http://1jzmerc.com/files/pdf/pinout-nissan-rb26dett.pdf

[rad100]

and where do the the input and output go?

on the vct wiring?

[KiwiRS4T]

Did you get instructions with it? It seems you need to use a relay to supply power to the solenoid and switch that with the MSD. Hopefully someone who's actually got one will put you right!

[Don Dada]

I'm assuming youre talking about the msd 8969?....

Red - Pin 49 (Switched 12v +ve)

Black - Pin 50 (Ground)

White - Pin 7 (engine rev signal for tach)

Yellow - Pin 113 (ground to switch vct solenoid) Cut this wire and connect the yellow wire to the end that goes out to the solenoid

Grey - not used

You can find both the manual for the msd and the ecu pinout for the rb25det online to figure out the pin layout ....Pin 113 is a light green with a red stripe if i remember correctly

[rad100]

Perfect. Thankyou very much.

[rad100]

ok so i got the unit all wired in perfect.

issue is, last track day i had a small fire which touched my wiring loom that goes to headlights, p/s, afm (so turbo side)

since then my tacho hasnt worked.

we tried to fix the dry solders on the back of the tacho, still no work.

just bought a new WORKING cluster, fitted it up and still no working.

have has consult connected and that said there was nothing wrong.

what could be the issue?

[GTScotT]

Im not sure what feeds what and so on, but with a wiring diagram you could work it out quick smart.

Basically you just need to trace the tacho wire back, from the dash to the next component. If the next component in series to the wire is the ecu, check continuity between the plug on the tacho side and the ecu side. Surely its just a broken connection.

Find what the tach wire leads back to and check if the wire is working. Find where its busted and repair it, or add a new wire.

[rad100]

could i run a multi meter right at the ecu for the tacho to see if its getting power? to rule out the ecu being stuffed?

coz im not sure but i would think the msd window switch should show a rpm display (this isnt happening)

hmm

[rad100]

just re-tested with consult, and it shows rpm.

[rad100]

delete thread,

taking it to the dump and throwing it off the edge..

its gonna go to a workshop so they can rape me $90 p/h

[Don Dada]

I believe the ecu calculates its rev signal from the cas

That harness you mentioned has a plug that nissan says is "engine speed detection terminal" so most likely this shorted when it burnt

Try your ecu in another car...sounds like that tach output circuit is fried

[nguyen8892]

I'm assuming youre talking about the msd 8969?....

Red - Pin 49 (Switched 12v +ve)

Black - Pin 50 (Ground)

White - Pin 7 (engine rev signal for tach)

Yellow - Pin 113 (ground to switch vct solenoid) Cut this wire and connect the yellow wire to the end that goes out to the solenoid

Grey - not used

You can find both the manual for the msd and the ecu pinout for the rb25det online to figure out the pin layout ....Pin 113 is a light green with a red stripe if i remember correctly

thanks for the info!