I have cleared a 232 code several times but it continues too return.I have checked the connections at the back of the dash ,all ok.The speedo is working fine.Any idea as to where to look for this problem?The car has 255000 an I'm looking to get my 300000 medallion,please help.

Other then the warning lights, are you experiencing any drivability issues or other unusual symptoms?

DEWFPO
--
1998 S90 083,228 and 1995 964 154,100

no the trans seems ok but sometimes it acts like it wants to start out in 2nd

Dear Waynepatek,

Hope you're well. At which "port" on the OBD device did you read this code?

The Volvo pocket data booklet: Cars (700, 850, 900) - 1991-1996 has pages of Code entries. These code explanations are grouped according to the system to which the codes pertain. Knowing at which Port on the OBD read-out device, the code was obtained, points to the system involved.

Yours faithfully,

Spook

A1 port the 232 code states that no speedo input but everything is working an I have taken the dash apart to check all connections. the dash has an arrow flashing an the shifter has the E an W flashing

Dear Waynepatek,

Hope you're well. A 2-3-2 code obtained at the A-1 OBD Port means the transmission is not getting a speed signal. The Aisin-Warner transmissions used in 960s are controlled by a computer module, whereas Aisin-Warner transmissions used in 940s are not controlled by a computer module.

I do not operate 960s and so do not have a wiring diagram for any 960. As a result, I do not know: (a) where the transmission control module is located and (b) by which wires the speedometer's signal is sent to the transmission control module.

That wiring - rather than that which connects the speedometer's pick-up (mounted in the differential) to the instrument cluster - is likely to be the source of the problem.

I'd begin by inspecting all wiring harnesses that go to the transmission. Look for signs of damage to harnesses, corrosion on connectors, etc. If you do not have a wiring diagram, you may be able to find the location of the control module by "back-tracking" the wiring harness that goes to the transmission.

Hope this helps.

Yours faithfully,

Spook

I would check the wiring back to the diff to the pick up may have a rub through mark and shorts out. When you clear the codes does it come back straight away?
Does the needle on the speedo drop down and come back up and then fault is present?

I've no idea what code 232 means. Maybe throw us some more details on the problem and we'll try to give out some armchair advice...
--
Try the easy to search Expanded Style FAQ Index. I own a Volvo or Does Volvo Own Me?

Hi,

It is an old post, but I was wondering if have solved the A1 232 code? I have the same issues with my 1995 volvo 960. Nothing wrong with the speedometer or the rear differential sensor!

Hi there,

Thanks for your reply. Update on my 1995 Volvo 960, codes are (OBD1- blinking LED lights): A1 124 (short circuit in WSE switch), A1 232 (speedometer signal missing), and A3 155 (rear differential sensor open circuit or short to battery voltage).

What I have done is so far: Its hard to clear those codes (doesnt want to be cleared following the 5 second push of the OBD1), after disconnecting the battery for long period (there will be no flashing lights), when ignition on the E and S both light up, then goes to W only then back and forth between (SE and W). After starting and putting the trans to drive, the arrow will flash constantly and so the WSE after getting to around 20-30 MPH.

I replaced the WSE switch (nothing changed!), checked the speed wire from the cluster to the TCM (green gray wire) and its intact. Checked the resistance of the speed/ABS sensor at the diff, and gave normal 1400 ohms. Checked the wires from the diff to the under the glove box above the ABS module (white green and white brown) and they show continuity. I spun the rear wheels while measuring the AC current from the trunk wires and was ok. I really dont know what to do more!

The car was in New jersey and Florida earlier, so it has been only 1 month in Cleveland, no rust or whatsoever under neath.The problem is constant and not intermittent.

I have ordered a second hand TCM, and waiting for it, but I dont think it will solve the problem.

I appreciate your help.

Hi Ozzy Oz,

Welp, New Jersey is a snow and salty rusty belt and Florida is a humid heck hole, and both contribute to gremlins in ageing electronics like that in your 960/90.

It is mythos to believe that clearing codes will mend the cause. Though clearing codes may make the controlling computer act as if no fault exist, until the ECU (electronic control unit) encounters the fault again. At any point along the circuit, there may be a fault, and it may require comprehensive visual connection.

Yet you may get away with investing the connection points along the circuit path. So, any connector from the sensor to the ECU. That may mean with battery disconnected, removing, inspecting, and restoring ECU connectors.

Wires can flex such that the stranded copper alloy conductor can break along a free to move cable arc, causing an open circuit - a discontinuity. Moving the wheels may not cause the condition for discontinuity. As you drive your vehicle, suspension-driveline articulation and movement vibration may cause the issue.

I am not intimate with the later wire harness routing and securing points on your model year 960. My familiarity ends at about 1995 940.

Though the speedo works fine, you say. Without fault. So, it may be time to pull the assembly oh so very carefully from the dash, and check the works there. Vehicle Speed Sensor / rear axle speed sensor signal goes through the speedometer itself and then to the ECUs. So, you have have fault between there and the reporting ECUs it would appear.

From the speedo outward to the ECUs. The connectors, or, inside the dash assembly. There exist, by model and year on 240, and Spook and others would no better for at least 940, the speedo assembly varies, and comes with problems that age reveals. Also, electronic components like capacitors. Vibration can cause factory solder welds along the circuit path to fracture. Corrosion can cause bonded connection to corrode.

As for the WSE switch, please see:

https://www.brickboard.com/FAQ/700-900/TransmissionAutoAW30.htm

I hope the TCM you have purchased is not expensive. Though these can fail. The cause may be varied. Replacement WSE switch could be faulty. The contacts inside the switch can get gunked up or carbon pitted, even though these are low current switches. Though your problem may requiore more comprehensive diagnosis.

Please see:
http://volvoforums.com/forum/volvo-260-760-960-28/1992-volvo-960-serious-transmission-issue-86992/

I'm unsure how I can help remotely further. More research using your favorite search engine using choice keywords can further help you.

Questions?

I hope that helps.

Thanks,

Catholic Thrift Store Clothing Scabies Infested MacDuff.

Thanks for all your help. I think I have fixed the car finally!

The WSE switch issue 124: Upon checking the wiring and the voltages, it seems the short is in the TCM. So after I replaced it, it was fixed and the code 124 cleared.

Next A1 232: After checking all the wiring and the diff sensor, I have no choice but to replace the cluster! Indeed, the car was still reading 232 code but I drove it for a while and it didnt go into limp-mode, so I hope it got fixed!

The speedo was working but may be not generating the signal to the ECU.

Thanks for all the help, I will drive tomorrow to confirm the fix.

Have a lovely weekend ;)

Hi again,

After replacing the TCM, I got ride of 124 shorted WSE fault. I have only one last code at the moment that is A1 232! It cannot be cleared and even if the flashing arrow disappear with the clearing, the OBD1 still say there is 232 missing speed signal. I checked the wiring of the diff sensor and the resistance of the sensor itself and they are all normal.

My cruise control doesnt work or show a light in the cluster! Is this has to do with 232 code?

Thanks for all your help ;)

Hi Ozzy Oz,

Diary of a Madman!!!

Rock and Roll! Rock and Roll!

Welp, both the mighty, all-powerful, all-seeing, omniscient, and omni potent Art B. and John Sergeant replied to you other post:

https://www.brickboard.com/RWD/volvo/1643289/940/960/980/V90/S90/missing_speed_signal_speedo_works.html

You are well cared for there!

Happy Holidays!!!!

Buttermilk MacDuff (Awaiting 17 March: Ancient Order of Royal Hibernians!)

Hi Ozzy Oz,

As in "Diary of a Madman" and "Blizzard of Oz"? Ha!

The OP to this thread has not posted to the brickboard since 2012. Doubtful he'll reply.

Please note Uncle Spook's mention of wiring issues. So, some wire cable and harness inspection may be due.

Do you have any other fault codes? If even unrelated to the A1 2-3-2 signal? I ask as the ABS system on your 1995 Volvo 240 uses the differential mounted speed sensor, same used for the speedo signal. Also, check the transmission for fault codes. You'll need your OBD II tester. (I guess you have an OBD-II tester, or you have the blinky box still?) If without one, contact your fave local auto store and ask if they have a tester you can use. Though consult the i-net on how to perform an OBD-II fault code check on your 1995 Volvo 960 before hand. All codes should display for all fault reporting components (Engine Control, ABS, Transmission, Arm Chair Espresso Machine, you know ...)

I see you live in humid, rusty, and snow flake and tonnes of salty Cleveland OH. So, in such an environment, corrosion at wire harness connectors both exterior and inside your Volvo 960 could be suspect. A mere disconnect and reconnect may be all you need.

Though, as Spook suggests, wire harness issues may be at play, such as a flexing cable causing the copper conductor to break inside the insulation, causing an intermittent fault or weak signal.

Please see:
http://www.volvowiringdiagrams.com/?dir=volvo/960%20Wiring%20Diagrams

You want file titled "Volvo 960 1995.pdf"

On PDF file page 24 of 44, please note at the most upper right the VEHICLE SPEED / ABS SENSOR (REAR DIFFERENTIAL). The sheathed cable contained two wire with color stripe. After the seal, there is a connector. The two striped wires goes to the ABS control module while the Green / White wire goes to the speedo assembly. From the speedo assembly, through the connector wire harness, I'll guess a hazard (Ha!) a wire carries the speed sensor signal as it is or processed through the speedo to both the transmission and the Motronic engine control system.

Like Spook, I've not owned a 960 now have perform such a task on it. So I'm merely reviewing what I can find on the issue. A 21+ year old speedo guage assembly can be faulty as solder joints can crack. Also, connectors get corrosion and can be gleeful of a twist or disconnect-reconnect.

Also, please review the wiring diagram.

Hope that hep kats (helps.)

Questions?

Though other with the hands on will illuminate the way to remediation of your speed signal fault code.

cheers,

Fleas and Mites MacDuff.