Type-X J5/J4 ECU - Redtop harness

Post by **johnnys180sx** » Thu Mar 13, 2008 6:04 pm

hey everybody i have a redtop wire hardness that i broken, now my buddy has a stock blacktop s13 wire hardness will it work the same? i mean after i put the ka plugs will it work?

Post by **CoupedUp** » Fri Mar 14, 2008 1:10 am

There are some changes to the blacktop harness in comparison to the redtop harness. I'm not 100% sure on the pinout changes near the ECU but I am aware of some.

Someone else will chime in.

Post by **Hijacker** » Fri Mar 14, 2008 1:41 am

Pinout changes on the ECU plug? I didn't think there were any since I've successfully ran S13 blacktop ECUs on redtop harnesses

Post by **CoupedUp** » Fri Mar 14, 2008 4:02 am

I did some more research, if its a 96-99 S13 Blacktop J5 ECU a few pins changed. If it is 91-95 S13 Blacktop E5 or E6(Auto) ECU than you're good to go.

If you have the J5 ECU, Ill do the research for you, I like helping people...haha. Im sure its minimal pins and maybe 3-5 solder joints.

Post by **Hijacker** » Fri Mar 14, 2008 4:10 am

That's what I thought. Thanks Sean!

Post by **Tulsa_S-13** » Fri Mar 14, 2008 6:49 am

CoupedUp wrote:I did some more research, if its a 96-99 S13 Blacktop J5 ECU a few pins changed. If it is 91-95 S13 Blacktop E5 or E6(Auto) ECU than you're good to go.

Correct, although I've never heard of an E6 ECU. Your Redtop harness will work with the J2 / J3 / E4 / E5 without any changes to the ECU pinout. These ECUs were found in S13s ranging from 1991 to 1996. The Type-X S13 Blacktop used the J4 and J5 ECU which, of course, have a slightly different ECU pinout than the non Type Xs.

Here are the ECU pinout differences-

Changes to other connectors were also made:

I'm assuming your friend has the wire harness for the early S13 Blacktop (non TypeX), as the TypeXs are harder to come across.

Here is a link to the pinouts for both the J2/J3/E4/E5 and J4/J5 ECUs. To make sure which harness your friend has you can simple compare the wiring coloring to that of the pinouts.

Complete pinout diagrams for KA/RB/CA/SR series ECUs:http://www.az240sx.org/tech/Pinout/

Post by **johnnys180sx** » Fri Mar 14, 2008 12:33 pm

wow guys thanks for all the help! so it look like the hardness is a CODE E5 so is should work thank guys

Post by **slow s13** » Fri Mar 14, 2008 2:42 pm

there are some differences in the O2 sensor circuit, if I recall its the power wire for the heater part of the sensor is different.

Post by **schanne** » Thu Oct 02, 2008 8:04 am

I have a J4 ECU and had to repin about 6 wires. It's really easy to do, just need a little patience. If you have the J4 or J5 ecu with a different harness you will have to repin or it wont even start.

Post by **schanne** » Thu Oct 02, 2008 8:10 am

This will help-zerothread?id=297604

Type-X J5/J4 ECU - Redtop harness

will this work?

Re: will this work? (johnnys180sx)

Re: (Hijacker)

Re: (CoupedUp)

Re: (Tulsa_S-13)

Re: (johnnys180sx)

Re: (slow s13)

Re: (schanne)

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