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Hi Guys,

I think my ECU is not working and now I am trying to buy used one from ebay.com, but the confusion that my ECU no. is 32920-41G20 whereas I am finding ecu no. 32920-41G10 so I need your help will it work with my GSXR1000 K5. really need your help here

thanks alot
MAJ
 

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32920-41G20 is for E24/Australian models. It was replaced by 32920-41G70 for K6 and it is the preferred replacement. 32920-41G10 and its replacement 32920-41G60 is for US/Canadian bikes that do not have an immobilizer. They won't work on yours. A possible alternate is 32920-41G00 or 32920-41G50 that were for European models. They have an immobilizer but also have a catalytic convertor and I think their fueling is slightly different.

If push comes to shove you could buy any unit and reflash it with the E24 bin. But you'll have to find someone who really knows what they're doing. That might be Woolich.

Note that, while ECM's can fail, they're fairly robust and something else is normally the problem.
 

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Bill thanks for the detailed reply really appreciated that.

I did bit more research and on wwwdotbike-parts-suzdotcom search my bike ECU no 32920-41G20 and i found it is K5(E2) UK model. so it is confirm that mine have immobilizer and US model doesnt have immobilizer .. so it means the alternate unit is 32920-41G70.. .right?
 

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32920-41G20 and 32920-41G70 are for E24, not E2 (though they will work on an E2). See here. 32920-41G70 is the preferred ECM for an E24.

P.S. Note that an immobilizer ECM requires a matching key. The best route is to buy the key with the ECM. There are companies that can make a key from scratch but they aren't cheap.
 

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Bill, now its confusing because on a lot sites I am getting that ECU no for E2 which UK.
and if i get ecu no 32920-41G70.. still do i have to reprgram my key or it will work without it with my old key because i dont think i will get a key with the ecu :(
 

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how can i identify that wehter my bike has immobilizer key or no?
I know the newer key making machines at most big box stores identify weather or not you have a chipped key. For instance if I walk into Home Depot or Lowe’s and try to have a key made there machine has a option to check the key to see if u have a chip on your current key.
 

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The ignition switch on an immobilizer equipped bike has two 4 pin connectors vs one 6 pin connector on a non-immobilizer. There are other differences but that's easy to check. Immobilizer equipped bikes have an immobilizer label on the tank and the red immobilizer indicator light on the cluster flashes, among other things. AFAIK, immobilizer and non-immobilizer keys look the same, though the immobilizer keys in the aftermarket have a removable chip.

Key making machines can duplicate an existing chipped key. But a new ECM will require a different chip, which significantly complicates things.

Ask the seller if the immobilizer ECM comes with a key. There must be some sort of workaround because programming the chip to match an unknown ECM is possible, but difficult. I don't know for sure but assume that a new immobilizer ECM comes with a chip matching key that is not cut. You take it to a locksmith and get it cut to match the ignition switch. The only other reasonable alternate is that the ECM comes with a key and a new ignition switch. But that creates problems of its own because the key must also match the gas cap and tail lock.

The K8 owner's manual states "Two ignition keys are originally registered to the immobilizer system. It is possible to add two more keys. The indicator blinks numbers of registered key when the ignition switch is turned on." I don't know what registration involves but it sounds like something that Suzuki does to the ECM, presumably when you send it to them. However note that K7/K8 use a different, more powerful ECM. This may not apply to K5/K6 and I don't have a K5/K6 owner's manual for E24/E2/E19 to check. Note also that the K8 manual says that the ECM should be replaced if all keys are lost. This implies that a new ECM comes with keys.

One nuance is that the E24 ECM may work better on an EU bike that has an aftermarket exhaust because of the lower back pressure of a non-catalytic exhaust.

P.S. I don't know where that page above came from because this is what I see from that source. It's consistent with what I've previously said.
 

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That's the one, assuming that the bike originally had 32920-41G20. Does it come with a key?

Quick question: Yes, but the preferred ECM is 32920-41G60 just like with the E24 ECMs. Note that a new ignition switch will use a key that won't match the gas cap or tail locks. So you'd need to either use two keys, get a locksmith to adjust the tumblers, or change those locks too.
 

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Yes Bill, I have old key.

So it is confirmed that if i switch to 32920-41G60 or less preffered 32920-41G60, i need to have a extra key for gas cap and tail lock. but it work fine if i change all the ecu, harness, and switch.
 

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^What was driving all this is his belief that his current 32920-41G20 is dead. I cautioned regarding that, as well as mentioning flashing.

32920-41G60 or the less preferred 32920-41G10 will also work with your existing harness if you make some wiring changes. Alternately, they will work with an E3 harness and your existing switch if you make a wiring change and change the connector at the switch. But the cleanest method is to change everything. I strongly suspect that a locksmith can change the tumblers in a new switch to match your existing key so you won't need two keys. Note that wiring changes need to be made to a high standard as the bike won't run if they fail. Finally note that a disabled immobilizer and/or modified wiring could adversely effect the bike's value, should it be sold later.
 

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Discussion Starter #15
Thanks Bill,
where I live there are less expert in modifying the wiring and flashing the ecu. So i think ideal situation is that DIY change all ECU Harness and Switch. but what about relays will my old relays will work or they need to be changed too ?

BTW I tried to check my bike one last time and i was getting weird sound from TPS and getting list of errors like 13,14,15,21,22, 23,29,31 on which i concluded that my ECU is fried. what do you think ?
 

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One interpretation of those codes is that the ECM is doing its job and the problem is elsewhere.

13,14,22,23,29 are for sensors that are powered by the 5 V sensors power, R lead. It can be checked at the SAP connector nearby the dealer mode connector. I'm betting that it's OK. 13,14,15,21,22,23,29 all connect to the B/Br sensors ground lead. I'm very suspicious that it is where your problem is. 31, the gear position sensor, is unpowered and uses a different ground. But the GPS is prone to act up so I'm suspicious that its problem is separate from the others. You could check the voltage on the P lead at the sensor. The voltages should vary with the selected gear from about 1.35 in 1st to 4.72 in 6th. C31 happens if the P voltage is .6 V or less. Also, with the bike off and the GPS disconnected, you could measure the resistance to ground on the B/W lead and the P lead resistance to ground (note, you're measuring the resistance through the GPS here, not through the ECM). The B/W resistance should be very low and the P lead resistance should range from about 370 Ω in 1st to 17,000 in 6th.

Note that the B/Br passes through a distribution block that sits on the wiring harness close to where the GPS leads come out. It's a connector-like object with a black cover and bunch of B/Br leads to it. It's possible that the B/Br problem is at the ECM connector, pin 29, or at the distribution block. People sometimes improperly disconnect pin 29, when switching to an aftermarket exhaust that doesn't use the EXCVA and get a bunch of error codes. Pin 29 should always be connected. Pin 42, also B/Br, is disconnected when the EXCVA is removed to suppress the C46 code. You could check the B/Br resistance in the wiring harness but disconnect it from the ECM before doing so. The service manual has info about checking the B/Br from the various sensors to the ECM connector.

Also look for blue/green corrosion on the ECM pins when you disconnect the ECM connector.
 
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