Hello ...
On the RB25 ECU / PIN 104 there's a control output for the Fuel-Pump to make the pump
less noisy (maybe activated by TPS?)
The Z32 ECU has exactly the same PIN/circuit but I doubt that this works correctly on my car.
(since my pump does not go into silent mode)
Is there a flag for this I can monitor?
I did a log and the FP flag is on all the time?
Is this FP-Flag only for the main relay output then?
Which flag is for PIN 104?
FP Relay .. Z32
Moderator: Matt
FP Relay .. Z32
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Last edited by Torque on Tue Aug 16, 2011 3:30 am, edited 1 time in total.
Re: FP Relais .. Z32
Register 0xE6 holds fuelpomp (FPCU) speedvalues.
I'm not sure if you are able to monitor this register with Nistune
TIM #1: FPCU LOW - PUMP @ 6V
TIM #2: FPCU HIGH - PUMP @ 14V (ALT VOLT)
TIM #4: FPCU MID - PUMP @ 7V
TIM #8: FPCU HIGH (CRANK)- PUMP @ 12V (BATTERY VOLT)
(this table is valid for twinturbo ECU's only)
I'm not sure if you are able to monitor this register with Nistune
TIM #1: FPCU LOW - PUMP @ 6V
TIM #2: FPCU HIGH - PUMP @ 14V (ALT VOLT)
TIM #4: FPCU MID - PUMP @ 7V
TIM #8: FPCU HIGH (CRANK)- PUMP @ 12V (BATTERY VOLT)
(this table is valid for twinturbo ECU's only)
Re: FP Relais .. Z32
HI Eric,
That's interesting.
Also I see 3 values there for different voltages ..
However judging from the 'drop-resistor-design' I initially thought there is only low and high,
but that seems to be wrong then.
On second look I don't know how exactly this FPCU works.
This resistor seems to be in parallel all the time with the pump connected to 12V and its ground connected to the FPCU.
Would you know whether this is 'on' 'off' logic or actually more behind it?
(like a modulated signal to the FPCU or even 'intelligence' ?
If all fails I have to use the plain old voltmeter to check ..
Here's from the inside of the controller (scroll down)
http://www.z32photoguide.com/fuelsys.html
That's interesting.
Also I see 3 values there for different voltages ..
However judging from the 'drop-resistor-design' I initially thought there is only low and high,
but that seems to be wrong then.
On second look I don't know how exactly this FPCU works.
This resistor seems to be in parallel all the time with the pump connected to 12V and its ground connected to the FPCU.
Would you know whether this is 'on' 'off' logic or actually more behind it?
(like a modulated signal to the FPCU or even 'intelligence' ?
If all fails I have to use the plain old voltmeter to check ..
Here's from the inside of the controller (scroll down)
http://www.z32photoguide.com/fuelsys.html
Re: FP Relais .. Z32
> Would you know whether this is 'on' 'off' logic or actually more behind it?
the FPCU of the Z32 twinturbo is somewhat intelligent and certainly not on/off.
It can be set to multiple output voltages...it's more like a programmable voltage regulator
The FPCU of the Z32 nonturbo and skylines is very similar in hardware to the Z32 twinturbo FPCU, but these only have 3 settings (off, low, high)
the FPCU of the Z32 twinturbo is somewhat intelligent and certainly not on/off.
It can be set to multiple output voltages...it's more like a programmable voltage regulator
The FPCU of the Z32 nonturbo and skylines is very similar in hardware to the Z32 twinturbo FPCU, but these only have 3 settings (off, low, high)
Re: FP Relay .. Z32
Hi!
Interesting ..
I think on the RB-25 (So Type 6) it is only On-Off ...
Maybe I need a different controller then?
Hmmm ... I will get my voltmeter out!
Interesting ..
I think on the RB-25 (So Type 6) it is only On-Off ...
Maybe I need a different controller then?
Hmmm ... I will get my voltmeter out!
Re: FP Relay .. Z32
Only in RAM monitor for now. I've only got the capability to read set memory addresses (eg knock etc) but might have to make it a bit more generic for special monitoring like this in the futureRegister 0xE6 holds fuelpomp (FPCU) speedvalues.
I'm not sure if you are able to monitor this register with Nistune