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 Post subject: 93 Swift TCM woes
PostPosted: Sun Mar 23, 2014 4:13 am 
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Joined: Fri Mar 21, 2014 5:08 pm
Posts: 5
Location: Alexandria VA
Okay, I have a 1993 1.3 Suzuki Swift with less than70,000 mikes automatic. Bought the car almost a year and a half ago and have had intermittent hassles with the tranny shifting almost from the beginning. At first it would lock up in third gear and not downshift. Then eventually it would lock up in first gear until it was driven a short distance and finally upshift normally. Next it would just stay stuck in first. After some Googling I diagnosed it as a TCM issue. I took it to a transmission specialist (independent and considered one of the best in the area) and they confirmed my suspicion (and ruled out solenoids as an issue). They farmed the TCM out to a local electronics shop and they soldered in a new capacitor. It ran fine for about 5 months but even then I had to let it warm up about 3 to 4 minutes before pulling off and it was slow to upshift initially. It reverted to staying locked in first and I had it towed to a repair shop. The mechanic had it for three weeks and said he drove it daily and it never locked up on him. Got it back and it was fine for two days and then locked up. I benched it for nearly a year and finally decided to either resolve it or get rid of it. It fired fine and has shifted perfectly the last six times I drove it. I don't trust it since in the past it has locked and had me driving it under 25 mph for over 3 miles trying to get it to upshift to 2nd gear. I'm considering getting a refurbished TCM from a module specialty place in Texas. Anyone else had this on again-off again hassle with their ride? It seems if it sits long enough it "heals" but reverts to form eventually. Any guidance would sure be appreciated.
Also... the seatbelt buzzer and light stay on unless I buckle the passenger side seatbelt. I'm assuming its a sensor in the seat or a glitch with the belt. Other than these hassles the car is nearly pristine and no rust. Opinions? Thanks. JOE .


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 Post subject: Re: 93 Swift TCM woes
PostPosted: Sun Mar 23, 2014 7:48 am 
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Joined: Tue Oct 24, 2006 3:09 pm
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Location: Palm Springs: Too hot from June to Oct.!
Aftermarket stereo? (Can mess with the dash resistor.)
Bad ground?

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 Post subject: Re: 93 Swift TCM woes
PostPosted: Sun Mar 23, 2014 6:48 pm 
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Joined: Fri Mar 21, 2014 5:08 pm
Posts: 5
Location: Alexandria VA
Hmmmm... hard to say. The problem existed before I swapped out the radio, but there was aftermarket radio already in place. I'm going to assume the transmission shop explored the grounding issue. then again... Thanks for the input. Any other thoughts out there?? :?: :?:


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 Post subject: Re: 93 Swift TCM woes
PostPosted: Sun Mar 23, 2014 7:22 pm 
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Joined: Fri Jan 07, 2005 2:46 pm
Posts: 883
Location: Arizona
In one of my '95+ cars with automatic I had similar issue , it would only run in 3rd gear unless I shifted it manually. While I was trying to find the problem I removed ECM and had it dangling on the wiring harness , started the car and it ran perfect . When I got back to the house I made 6 plastic washers and isolated ECM housing from the ground. Never had a problem after that . Sold the car that way.


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 Post subject: Re: 93 Swift TCM woes
PostPosted: Mon Mar 24, 2014 10:27 am 
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Joined: Thu Jul 20, 2006 7:17 pm
Posts: 1405
Location: Alberta, Canada
Think you could get a number off the Tcm? I could likely find one here, $40 for one. They really very rarely give problems so a used one should be fine. I know this isn't ideal, but one option if it gets stuck in the wrong gear is to unhook the single electrical connector that goes into the trans and controls the shift solenoids. When it's unhooked, the shifter manual positions control all trans function, meaning drive = straight to 3rd gear, like a manual transmission. Doing this would also confirm the problem is with the electrical controls. If you unhook the electrical system and it still stays in the wrong gear then it has an internal hydraulic or valve issue.
The only other thing I can think of is a speed sensor problem, have seen that twice before. There is a speed sensor in the speedometer and one on the trans that send a signal to Tcm. If it loses this signal it won't come out of first because it thinks it's not moving. I was dealing with a mk1(1988 model) but the system was very similar to you 93.
I know that sort of thing can be frustrating, but I think with a bit of a hand you can get through it. Unhooking the electrical connector can at least make it so you don't feel like it can strand you with a car that only has first gear when it wants to!

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 Post subject: Re: 93 Swift TCM woes
PostPosted: Mon Mar 24, 2014 12:16 pm 
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Joined: Fri Mar 21, 2014 5:08 pm
Posts: 5
Location: Alexandria VA
codyb76 wrote:
Unhooking the electrical connector can at least make it so you don't feel like it can strand you with a car that only has first gear when it wants to!


Aye. There's the rub!! Right NOW it's behaving itself, but from past unnerving experiences I don't trust it as far as I can toss it. It throws these little "tantrums" unexpectedly and leaves me in a lurch, only to revert to normal much further down the road (after a protracted period of inoperability). Repeat. Repeat. Repeat. If the TCM is bad, fine. It's the back and forth with no discernable pattern that is hacking me off. Thanks evry much for the info. Maybe a mechanic can narrow down the culprits with this additional info. :roll: :)


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 Post subject: Re: 93 Swift TCM woes
PostPosted: Tue Mar 25, 2014 6:24 am 
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Joined: Thu Jul 09, 2009 1:14 am
Posts: 1897
Location: Prince George B.C. Canada
I had a Honda (I know, shoot me but I bought it for resale). It had an intermittent shift issue. I never knew when it would F*** up. Turned out to be a broken wire just outside one of the connectors. Cut the wires back an inch or so on each side and spliced in a new connector, no problems ever since. Just something to contemplate.


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 Post subject: Re: 93 Swift TCM woes
PostPosted: Thu May 29, 2014 5:12 pm 
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Joined: Fri Mar 21, 2014 5:08 pm
Posts: 5
Location: Alexandria VA
Okay, back to try another approach. Still not having much luck here with the transmission / TCM issue posted above, so I 'm wondering if there are any local (Metro Washington, D.C., Northern Virginia, Maryland) Suzuki owners who have dealt with or know of any local reputable/competent Suzuki specialists that can determine and resolve my car's issues? Again... it's a '93 Swift auto with the 1.3L. Basically looking for referrals for some place that won't try to hang me out to dry or some solid advice. Thanks in advance!


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 Post subject: Re: 93 Swift TCM woes
PostPosted: Sat May 31, 2014 9:24 am 
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Joined: Mon Dec 01, 2003 12:47 pm
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Location: columbus, ohio
it may not be the tcm (and probably isn't because when transistorized components go bad they usually don't go random, they just stop working.)

you may need to adjust the shifter, the big switch on top of the transmission, or may have a broken harness wire as stated.

the shift solenoid coils inside the pan on the pump body may be opening up when heated. the connector for the 2 shift solenoids might be cruddy and giving you an intermittant problem. you just have to go through everything.

you cannot beat the factory service manual's diagnostic section and on car testing matrix for this sort of trouble. :wink:

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