DIY Honda ECU Repairs- P30 P08 P27

[g4i8y0t]

This board is double-sided PCB, you need to solder the caps on both sides.

 

[_firecracker]

This board is double-sided PCB, you need to solder the caps on both sides.

thanks, i tried this as well and still code 14

 

[g4i8y0t]

Hmm... I also dunno why, you'll have to wait for the sifus for their opinion.

 

[E-Tech]

thank you for your suggestion. I just switched out all of the caps and it still gives a code 14

Hi...
There are 3 caps with value 33uf 35v.
1- Have u replace with same uf value?
2- check these 3 caps -ve legs with multi meter.
There should be continuity between the -ve leg because
all are connector to ground.

Try this first .....

 

[_firecracker]

Hi...
There are 3 caps with value 33uf 35v.
1- Have u replace with same uf value?
2- check these 3 caps -ve legs with multi meter.
There should be continuity between the -ve leg because
all are connector to ground.

Try this first .....

C15, C19, and C21 were all replaced with P5549-ND from digikey, i found that on PGMFI awhile ago and ordered the set. I did not think this would be the cause of code 14 though.

My multimeter beeps on the negative leads of all those capacitors.

 

[E-Tech]

Check tis transistor then...

 

[_firecracker]

Check tis transistor then...

Thank you for your help. Will either of these work?
10pair 2SA970 2SC2240 A970 C2240 Transistor | eBay

Digikit.ca :: Components :: Transistors :: Transistor C2240, Pack of 2

 

[E-Tech]

Thank you for your help. Will either of these work?
10pair 2SA970 2SC2240 A970 C2240 Transistor | eBay

Digikit.ca :: Components :: Transistors :: Transistor C2240, Pack of 2

Yup..... 2SC2240 =C2240

 

[Spoon84]

Hi, newbie here...
I got problem with my P08 ecu. After start-up the engine about 1 minute, the idle go up & down about 3000 rpm. I was using P08 for hondata. I checked on pin A9 with multimeter the voltage start decreasing from 12v to 1.5v cause my IACV open. I already swap with 2nd hand IACV got from halfcut. I swap with original ECU the problem went off. Any ideas? Thank in advance

 

[levin818]

thanks, i tried this as well and still code 14

I am doubt its the components issue. Try clean up your board with high quality thinner, remove ALL dirty residual that reside in between the pins.

---------- Post added at 06:28 PM ---------- 6 hour anti-bump limit - Previous post was at 06:19 PM ----------

If problem still exist, mean that you have disconnection in you IAC circuitry due to corrosion. You need to trace it with great patient.

 

[fazrul80]

hi Bro,
Hi.....
Sorry to ask..
i'm already change all caps, c16, c17, Q3 E, IC12 and QM3...
when i test to my car CEL lights goes off after 2 seconds but car won't start... when i checked, the main relay just sound for 1 click and no 2nd clicks...it's coz fuel pump not primes..when i change another main relay it's just same symptom....
any advise bro? tq...

---------- Post added at 12:14 PM ---------- 6 hour anti-bump limit - Previous post was at 10:54 AM ----------

Oppss...sorry not IC12 but IC17 (TA8903SN)....it's P27 T00 ecu...
TQ in advance....

 

[E-Tech]

hi Bro,
Hi.....
Sorry to ask..
i'm already change all caps, c16, c17, Q3 E, IC12 and QM3...
when i test to my car CEL lights goes off after 2 seconds but car won't start... when i checked, the main relay just sound for 1 click and no 2nd clicks...it's coz fuel pump not primes..when i change another main relay it's just same symptom....
any advise bro? tq...

---------- Post added at 12:14 PM ---------- 6 hour anti-bump limit - Previous post was at 10:54 AM ----------

Oppss...sorry not IC12 but IC17 (TA8903SN)....it's P27 T00 ecu...
TQ in advance....

Pictures pls... And recheck your qm3.... Did you damage the trace when replacing it?

 

[_firecracker]

Yup..... 2SC2240 =C2240

I just got the part in, however the picture you showed me of Q37 is not from my ECU or even one with the same board. Q37 is not a 2240 transistor. Did you mean Q38 on the 1980 board?

I am doubt its the components issue. Try clean up your board with high quality thinner, remove ALL dirty residual that reside in between the pins.

---------- Post added at 06:28 PM ---------- 6 hour anti-bump limit - Previous post was at 06:19 PM ----------

If problem still exist, mean that you have disconnection in you IAC circuitry due to corrosion. You need to trace it with great patient.

I will check and retouch some solder joints

 

[_firecracker]

I am doubt its the components issue. Try clean up your board with high quality thinner, remove ALL dirty residual that reside in between the pins.

---------- Post added at 06:28 PM ---------- 6 hour anti-bump limit - Previous post was at 06:19 PM ----------

If problem still exist, mean that you have disconnection in you IAC circuitry due to corrosion. You need to trace it with great patient.

removing the corrosion fixed it, thank you.

 

[fazrul80]

Hi Bro E-tech...
Sorry for late reply .. I recently returned from a course ..
I've checked all the trace with a multimeter. all relevant trace has continuity... i dunno what's the problem..
this my p27 ecu...