VZ Ute speedo not working

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VZ Ute speedo not working

Postby Madmatt2006 » Mon Nov 12, 2018 10:13 am

Hi Guy's :)

back again with a different problem, I finally got the ute to a point that it's now all working except the speedo! :hmm: neither the dial or digital,I have checked a few things.

1. I did the dash test on the car by holding the mode/set buttons and did the cluster check, the speedo popped up to 100 so it seems to be ok. :thumbup:
2. I tested the voltage to the speed sensor in the 6 speed manual it has 12V to pin 1. and pin 2. negative

the speed sensor part number is GM09114603 it has 3 pins, from testing the plug it seems that pin 1. is 12v+ pin 2. in the negative pin 3. is pulse. is that correct?

I tried testing the sensor by hooking 12v to pin 1. and negative to pin 2. the I hooked multi-meter to pin 3. and pin 1. set to dc volts and passed metal by the sensor. no voltage change on multi-meter :wtf:

1. So I was wondering if I had the pinout right for that sensor?
2. also is that the only sensor the speedo talks to for speed?
3. anything else to check?

Thanks Guy's :thumbup:

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Re: VZ Ute speedo not working

Postby Madmatt2006 » Tue Feb 19, 2019 12:41 pm

Hi Guy's :D

I changed the speed sensor in the manual gearbox and the speedo is still not working. Do the wheel speed sensors effect the speedo? could this be why it's not working? Not sure what to check next..

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Re: VZ Ute speedo not working

Postby delcowizzid » Tue Feb 19, 2019 2:59 pm

I thought t56 was 2 wire reluctor sensor not 3 wire hall effect.where did you wire the speed sensor into on the ecu
If Its Got Gas Or Ass Count Me In.if it cant be fixed with a hammer you have an electrical problem

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Re: VZ Ute speedo not working

Postby Madmatt2006 » Tue Feb 19, 2019 3:48 pm

Hi delcowizzid,

The car has standard wiring, the gearbox wiring connects to the engine wiring loom at the back of the engine. I changed the speed sensor in the gearbox to see if the speedo would start working it's a 3 wire sensor for sure same as the original one 3 wire hall effect.

I guess next step is the test speedo pulse wire b33 and power to the sensor.

is there any other sensors the speedo uses?

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Re: VZ Ute speedo not working

Postby Dylan » Tue Feb 19, 2019 4:05 pm

I've never come across a T56 with a 3 wire speed sensor

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Re: VZ Ute speedo not working

Postby vs ss » Tue Feb 19, 2019 7:40 pm

I take it this must be a Vz v6 Aisin gearbox if it has a hall sensor?
I’m not saying it’s your problem, but I have replaced a few ecu’s cause of this problem.

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Re: VZ Ute speedo not working

Postby Madmatt2006 » Wed Feb 20, 2019 12:31 pm

the VZ ute is a SVZ maybe why box is different?? I have a spare ecu and BCM I will swap them on the weekend to see if it works.

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