ecu wiring for engine swap

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Offline 3xl7sofar

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ecu wiring for engine swap
« on: March 11, 2017, 11:03:21 AM »
hi! I am doing a engine swap from a 01/2001 xl7 2.7 to a 12/2003 grand vitara 2.5. following this post alot
http://www.zukiworld.com/forum/general-suzuki-forum/2-5-to-2-7-swap-in-2000-grand-vitara/

however my years are a bit different  and both are 4wd. i need wiring diagrams to match my years.
can anybody help

Offline ebewley

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Re: ecu wiring for engine swap
« Reply #1 on: March 11, 2017, 12:47:47 PM »
You may be able to do a long block swap only and keep all of your original electronics. That approach may be simpler.

Eric
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Offline 3xl7sofar

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Re: ecu wiring for engine swap
« Reply #2 on: March 12, 2017, 10:52:53 PM »
I've already done the swap as the 2.5 has warped heads and the 2.7 only has 40000k. just looking for wiring diagram help. there is only one dealer in my area and they won't help me or sell me any fsm info. I bought one online (Suzuki_Grand_Vitara_Xl-7_1998-2006_Full_Service_Repair_Manual) but it seems to skip my vins.
I would be happy to share this if it would help

Online BRD HNTR

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Re: ecu wiring for engine swap
« Reply #3 on: March 13, 2017, 08:28:17 AM »
I've already done the swap as the 2.5 has warped heads and the 2.7 only has 40000k. just looking for wiring diagram help. there is only one dealer in my area and they won't help me or sell me any fsm info. I bought one online (Suzuki_Grand_Vitara_Xl-7_1998-2006_Full_Service_Repair_Manual) but it seems to skip my vins.
I would be happy to share this if it would help
I think you may have missed what Fordem said.  It would be much easier if you connect the 2.5 harness to the 2.7 motor.  What you are going to miss in performance is negligible compared with switching out wiring.
Just glancing through the wiring diagrams, color codes are the same (as are all the Zuks it seems), they are using same connector numbers, BUT most if not all pin numbers are different going to the computer.  The sensors seem to be using same plug & pin numbers.  This is just in the same year, now you are going to also change years which frequently changes computers also or adds more controls.

"The H27A is a bored out version of the H25A, displacing 2.7 L (2,736 cc, coming from an 88 mm bore and 75 mm stroke). It produces 135 kW (184 PS) at 6,000 rpm and 250 N·m (184 lb·ft) at 3,300 rpm"
Running it as a bored out 2.5 is the easiest and most reliable option.  The next option would be to change out all wiring including computer to the 2.7 wiring.  Last option is to connect 2.7 wiring to your wiring, repin the computer input pins and then change to the 2.7 computer AFTER reviewing all relevant wiring diagrams.  (If you get one wire off, it will be hard to figure out, and may fry your computer.)

Your in luck all those options are easier than squeezing that motor into a 93.
93 Tracker,XL7 springs & 1" raised spring pads in front with YJ springs in back, home built bumpers rear & front (w/winch), 2" x 4" rock tubes,  ARB front & rear, converted Sami rear to IFS, 33x12.5x15  aluminum rims, roll cage, 2.7L w/5 speed auto.

Offline ebewley

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Re: ecu wiring for engine swap
« Reply #4 on: March 13, 2017, 02:30:45 PM »
Yes, I would rewire but investigate. Using all of the 2.5 hardware and electronics with the 2.7. The only thing that's iffy is the intake as the 2.5 has a built in maf vs. Separate maf on 2.7

Eric
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Online fordem

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Re: ecu wiring for engine swap
« Reply #5 on: March 13, 2017, 04:48:17 PM »
I think you may have missed what Fordem said.

I think that was Eric - although I do agree with him - no personal experience, the 2.5 & 2.7 engined versions aren't that common in this neck of the woods (import duties are tied to engine size and rise sharply once you pass 2 litres) but it's my understanding that the 2.7 runs quite well with the 2.5 electronics & sensors.
'98 SQ420 Grand Vitara
'05 JB420 Grand Vitara

Offline 3xl7sofar

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Re: ecu wiring for engine swap
« Reply #6 on: March 13, 2017, 10:35:13 PM »
Thanks brd hntr. I understand it might be easier to swap the harness. I've been waiting for the 2.5 to die to do this swap. i was inspired by an earlier thread here. what I'm trying to do is retain the hp of the 2.7l. I've been spending alot of time trying option 3 ( "Last option is to connect 2.7 wiring to your wiring, repin the computer input pins and then change to the 2.7 computer AFTER reviewing all relevant wiring diagrams".) What I am having a hard time with is " reviewing all relevant wiring diagrams" as I can't seem to locate them. my vins are as follows; 01/20012.7l js3tx92v1141xxxx3   and  12/2003 2.5l js3td62v54410xxx2 can you help me find the relevant diagrams for e61 and c52?  most of the diagrams Ive looked at are different than my cars. also Ive heard the color codes stay the same anyone know if thats true?

Online fordem

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Re: ecu wiring for engine swap
« Reply #7 on: March 14, 2017, 06:36:35 AM »
3xl7sofar - what's your location?  I may be able to assist with diagrams for the GV - VIN #JS3TD62V54410xxx2.
'98 SQ420 Grand Vitara
'05 JB420 Grand Vitara

Online BRD HNTR

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Re: ecu wiring for engine swap
« Reply #8 on: March 14, 2017, 07:19:10 AM »
I do not have the 01 FSM, so it would be hazardous to say it is the same WIRING as the 03 FSM (I know that the 05 is vastly different). 
The ECM has 4 connectors E61, C51-1, C51-2, C51-3 (25-35 pins), and the C52 has 24 pins (without a listed pinout that I have found, so have to go through the schematics and see if I can find all pins.  And maybe not all pins are used so would I miss a wire or is it not used.)  There are pinout listed for both 2.5 and 2.7 on the ECM. 
This is just a start of the pinouts. 
And it looks like Fordem has you covered on diagrams.
« Last Edit: March 14, 2017, 07:22:51 AM by BRD HNTR »
93 Tracker,XL7 springs & 1" raised spring pads in front with YJ springs in back, home built bumpers rear & front (w/winch), 2" x 4" rock tubes,  ARB front & rear, converted Sami rear to IFS, 33x12.5x15  aluminum rims, roll cage, 2.7L w/5 speed auto.

Offline 3xl7sofar

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Re: ecu wiring for engine swap
« Reply #9 on: March 14, 2017, 08:00:58 PM »
thanks for the diagrams they are close to the 2001 2.7l i found the diagram for the 2003 2.5 for e-61 going through the fsm trying to figure out c-52
the problem is the 01/2001 2.7 js3tx92v1141xxxx3 I cant figure out which fsm it is. the vin lookup in the manuals starts at js3tx92v-2xxxxxxxxx I think I have all the fsm manuals from 1998 to 2006. BTW im in western washington

Offline 3xl7sofar

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Re: ecu wiring for engine swap
« Reply #10 on: March 14, 2017, 10:46:44 PM »
update i have the diagrams for e-61 for both the 2001 and the 2003. i have the diagrams for the 2001 that show the wires for c-52.  I can't seem to find the diagrams that match the 12/2003 for c-52 getting very close im 5 wires away on c-52  most of the wire colors match. but id like to read the diagrams to make sure the same colors do the same thing

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Re: ecu wiring for engine swap
« Reply #11 on: March 15, 2017, 08:15:49 AM »
update i have the diagrams for e-61 for both the 2001 and the 2003. i have the diagrams for the 2001 that show the wires for c-52.  I can't seem to find the diagrams that match the 12/2003 for c-52 getting very close im 5 wires away on c-52  most of the wire colors match. but id like to read the diagrams to make sure the same colors do the same thing

Looking back at my files I found this on the C52.  These are notes and reference where the signal would be sent or from.
PIN   WIRE COLOR   USEAGE   PAGE
1   ORN/WHT   4WD Lo switch to TCM and 4WD CONTRL MOD. - 16  E229-18 & C204-1 & Dash   9A-40
         
2   BLU/YEL   To BCM-11 and Speedo   E229-10 & C2-15   9A-36/22
         
3   BLU   Run new wire from MAIN PWR BLK/WHT to Relay for O2 BLU to #3, pickup of BLK/WHT to Gnd.   9A-24
         
4         
         
5         
         
6       (Variable Inhalation Valve)  Not using   9A-23
         
7         
         
8         
         
9   ORN/GRN   P/N from Trans Range Sensor for shift lock (not using)   9A-31
         
10   BLK   Gnd.  For Noise suppressor and other Gnds.   9A-24
         
11   BLU/BLK   Pwr from Main Pwr Relay   Also Pwr to MAF   9a-22
         
12   RED   TRS to Backup light & E228-16   9A-69
         
13         
         
14   WHT/YEL   4WD switch GND to 4WD CNTRL MOD. -18   (To C1-8)   9A-29/32/69
         
15   GRN/WHT   T/F for switch (4wd) to 4WD CNTRL MOD. -17   9A-40
         
16   BLK/YEL   Gnd to DLC-5      9A-24/26/35
         
17         
         
18         
         
19   BLK/YEL   P/N to starter   9A-15
         
20   BLK/RED   Start signal to TRS BACK on 19   9A-15
         
21         
         
22   BLK/WHT   Pwr In from IG Coil Fuse & Pwr to O2 Htr Relay Coil In which is gnded.   9A-24
         
23   YEL   Pwr to TRS   9A-69
         
24   GRY/YEL   In from IAT (E61-4 is out signal)   9A-22
93 Tracker,XL7 springs & 1" raised spring pads in front with YJ springs in back, home built bumpers rear & front (w/winch), 2" x 4" rock tubes,  ARB front & rear, converted Sami rear to IFS, 33x12.5x15  aluminum rims, roll cage, 2.7L w/5 speed auto.

Offline 3xl7sofar

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Re: ecu wiring for engine swap
« Reply #12 on: March 15, 2017, 06:47:48 PM »
i have almost all the suzuki fsm 1998-2006 but it seems i am missing the wiring manual for the dec. 2003 (should i just call it a 2004?) the number i have for it is 99512-52D10-015 anyone have it? I'm going to web search for it tonight but don't hold out much hope. this is the last piece of the puzzle and i can start moving pins
In case any of you have a diagram that matches
my pin outs for the 12/2003 2004? c-52 are as follows
1. -
2. blu/yel
3. blu
4. lt blu
5. grn
6. yel/grn
7. orn/blu
8. orn/grn
9. orn/grn
10. blk
11. blu/blk
12. red
13. orn/blk
14. red
15. pnk
16. blk/red
17. -
18. grn/orn
19. blk/yel
20. blk/red
21. yel/wht
22. blk/wht
23. yel
24. gry/yel

Offline 3xl7sofar

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Re: ecu wiring for engine swap
« Reply #13 on: March 16, 2017, 08:10:34 AM »
YES!!! thank you FordEM that was my missing puzzle piece I now have the relevant diagrams for the 2001 and the 2003/4. I will start reviewing the tonight (like thats not what I've been doing all week) As far as I can tell I just have to figure out the 2 plug e-61 and c-52 and I'm good to go. thank guys I will keep you posted

Offline Tortis

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Re: ecu wiring for engine swap
« Reply #14 on: March 22, 2017, 09:49:03 AM »
I've been following this thread very closely, as I have a 99 GV with very noisy chains.

After investing a lot of time and money into modifications, I've decided to fix the noisy timing chain.  I recently witnessed the tear down of a 2.5 that had granuals of chain guides throughout the block and heads, requiring a total overhaul.

Two days ago, I was at a local shop that had a wrecked 2.7 GV 4x4 sitting out back that they are making me a great deal on.  I was able to start it up and the engine is very quiet.  I have to go back and get the vin# to get more serious about the possibilities of a swap.  After reading this thread and the 2005 thread from stuntpilot, I have a few questions: 

Does anyone on this forum have first hand experience performing the "long block swap" (option 1) that Eric mentioned?
If so, what did they do for the MAF sensor?  (change intake? or, rewire new MAF sensor? 
Any other mods required to do this option?

Currently am leaning towards doing the wiring changes (option 3), since I have a running donor vehicle that is 4x4 with all the wiring, but I don't want to dive in and find it is too fiddly.  Any info would be appreciated very much.

Thanks!

Meach4x4

1999 Grand Vitara- Auto, 265/70/16 Duratracs, Stock Alloys,OME springs, 1" spacers, Bilstein rear shocks, 1 1/2" Strut spacers, steel front diff and carrier, 5.12 gears, de-plasticized, cut fenders, beat wheel wells, Pioneer super tuner, 10m stryker, custom steel bumpers, thrasher timing chain, squealer drive belts...