Drive a Honda Civic Eg/EK Must Read!

leachuan

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Location Capacitance Voltage Temperature
C21 33uF 35V 105C
C27 220uF 35V 105C
C31 220uF 10V 105C
C32 33uF 35V 105C
C34 33uF 35V 105C
C36 47uF 10V 105C
C94 100uF 10V 105C

Opened my P30. Above is what i jot it down....
Yea... A few caps are deteriorating.
 

E-Tech

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Location Capacitance Voltage Temperature
C21 33uF 35V 105C
C27 220uF 35V 105C
C31 220uF 10V 105C
C32 33uF 35V 105C
C34 33uF 35V 105C
C36 47uF 10V 105C
C94 100uF 10V 105C

Opened my P30. Above is what i jot it down....
Yea... A few caps are deteriorating.
Correct... Get them all change.
 

leachuan

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E-Tech, I found my caps :) Thanks for the help anyway.

---------- Post added at 11:36 AM ---------- 6 hour anti-bump limit - Previous post was at 10:30 AM ----------

First of all, I wanted to thank E-Tech for bring up this topic.

I did some searching on the capacitors of my P30. My personal thought as below:

The capacitors inside my P30 were from Nichicon and the ratings are stated:
Location Capacitance Voltage Temperature
C21 33uF 35V 105C
C27 220uF 35V 105C
C31 220uF 10V 105C
C32 33uF 35V 105C
C34 33uF 35V 105C
C36 47uF 10V 105C
C94 100uF 10V 105C

6 of the capacitors were Nichicon PR series and C94 I couldn't see the brand but it's a KME series. Nichicon PR series is an obsolete model. It was replaced with PS series which is miniature size, low impedance and for switching power supplies. There is also a better (in my opinion) series - PW which is also miniature size, low impedance and HIGH RELIABILITY for switching power supplies.

There are couple of manufacturers in the market, eg. Rubycon, Panasonic, Vishay etc which is common in the market you can choose from...

In order to choose compatible capacitors, there are few things to look at:
1. Minimum capacitance.
You must know the capacitance, cannot be lower than specified.

2. Temperature.
The one in my P30 was clearly stated 105 degree C. So stick to it so it can withstand/last longer when the capacitor heats up during charging and discharging.

3. RMS Ripple Current.
You will see this in the datasheet. Capacitor will generate heat when charging and discharging current flow (Ripple Current). This R.M.S. ripple current generally is stated at the condition of 100kHz/105 degree C. Higher the better.

4. Endurance/Lifespan
Generally capacitor will have the number of hours tested with ripple current applied at 105C. Higher the better.

5. ESR (Equivalent Series Resistance)
Only some of the datasheet specified, higher ESR increase heat dissipation and aging. Lower the better.

6. Leakage Current.
Flow of leakage current for aluminium electrolytic's increases with temperature. Normally I found the in the range of 3-4uA.

7. Size
Size does matter. If you are replacing the old ones, the same size will be hassle free. No worries on the space constraint and pitch issue.
However, small difference of pitch/height/diameter can be adjusted to cater the space on the PCB (printed circuit board). Best is for the capacitor to sit perfectly (attached) to the PCB.
Normally smaller device cater lower voltage and maximum temperature rating. Miniatured device often have lower lifespan compare to larger device. But, technology is more advance today.

That's all I have for today. Although is easy to match by physical unit which is printed on:- Capacitance, operating voltage and max temperature, don't judge by the look if you are fussy :) Engineers create a datasheet for a reason. Companies don't pay specific engineer (technical writer) just to write out the characteristic for no reason. Knowing details can get better reliability capacitors with your budget.
 

E-Tech

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Wah...thanks for the update...
Hee hee hee... Most of those spec is critical
for application in amplifier or car stereos or receivers...
 

cat77

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bro E-tech, please pm me your name, hp number and full address.....will sent a P30 ecu to u for repair......thanks
 

siauann

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Siauann
Ecu located at front passenger side.
Side panel under the console.
Remove the side pastic cover and you will
Be able to see the ecu...remove some screws
And ecu can be brought out.
Number is at the side of the ecu...
i manage to remove the ecu and check before cny while cleaning the car.
37820-P2T-J91
does this affected?:confused:
 

E-Tech

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i manage to remove the ecu and check before cny while cleaning the car.
37820-P2T-J91
does this affected?:confused:

You should be okay....
Never repaired that model so far for caps leak problem.

You r ok.
 

TOMEI-R

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Hi bro.. Mine is a Hondata s300 bundled Ecu. Bought brand new from authorised Hondata dealer It is still basically a obd1 ecu brand new equipped with the s300 fitted all by Hondata themselves. So am I affected?
 
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