953C BBX fuel issues, error codes and troubleshooting

CM1995 said:

Loader has had no codes thrown until today. I have a 30 and a 0324.05. Only two codes show up.

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Thats a code for the action lamp current low or open.

Is the bulb burnt out on the dash? If so unscrew the red lens and remove the bulb from the front. I can do it with my thumb if i wear a rubber glove.

Thanks Lee.:thumbsup I'll check it Monday and see. The bulb on the left is working normal upon startup.

The code didn't come on again but I only ran it 15 mins or so walking it across the site. If the lamp is good, where else should I start looking?

Thats a simple circuit so either its the bulb or wiring, the bulb is either burnt out or it popped out of the socket. (push and twist )
When you turn the key on it should light momentarily. The left is the park brake lamp, right is the action lamp.

CM1995 said:

Thanks Lee.:thumbsup I'll check it Monday and see. The bulb on the left is working normal upon startup.

The code didn't come on again but I only ran it 15 mins or so walking it across the site. If the lamp is good, where else should I start looking?

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Here's the Diagnostic Procedure .......

This diagnostic code is recorded when the main display module reads the current of the circuit for the action lamp and the current is below normal. The action lamp does not light as a result of this diagnostic code. The schematic that is shown above represents a typical installation of the component. Verify the connector contact and wire numbers by using the Electrical System Schematic for the machine that is being serviced.

Test Step 1. CHECK THE LAMP. At the action lamp, use a jumper to connect wire 411-PK to frame ground.

Expected Result: The CID 0324 FMI 05 is no longer present.

Results: OK - The CID 0324 FMI 05 is no longer present. The lamp (bulb) or the lamp socket is open. Repair: Replace the action lamp. NOTE: For the purposes of this test, the correct resistance for a known good lamp is less than 200 ohms.

STOP

NOT OK - The CID 0324 FMI 05 is still present. The action lamp is not causing the diagnostic code. Proceed to test step 2.

Test Step 2. CHECK THE HARNESS. Turn the disconnect switch and the key start switch to the OFF position. Remove the jumper from wire 411-PK to frame ground. Make sure that the action lamp is connected to the machine harness. Disconnect the machine harness from the main display module. At the machine harness connector for the main display module, measure the resistance between contact 13 (411-PK) and frame ground.

Expected Result: The resistance is greater than 100 ohms.

Results: OK - The resistance is greater than 100 ohms. The harness circuit is open. Proceed to test step 3.

NOT OK - The resistance is less than 100 ohms. The harness circuit resistance is correct. Replace the main display module.
Repair: It is unlikely that the main display module has failed. Exit this procedure and perform this procedure again. Also, recheck if the diagnostic code indicator is illuminated for this diagnostic code. If the cause of the diagnostic code is not found, replace the main display module. See Testing and Adjusting, "Module - Replace".

STOP

Test Step 3. CHECK THE HARNESS. At the action lamp, disconnect wire 411-PK from the lamp socket. Check for open circuit in the 411-PK wire. Check between contact 13 of the harness connector for the main display module and the lamp socket. Check for an open circuit in the 201-BK ground wire. Check between the lamp socket and the frame ground.

Expected Result: The circuits are correct.

Results: OK - The circuits are correct.

STOP

NOT OK - The circuits are NOT correct. Repair: Repair the harness or replace the harness.

STOP

Thanks Nige for the detailed troubleshooting procedure.:drinkup

I am hoping it's doesn't get that involved, as my mechanic skills are novice at best but getting better through "baptism by fire".

Thanks for the help guys.

It's been a busy week.

Both lights good, action lamp cycles on during startup. The "!" flashed again while running and same code 30 , 324.5. I dropped the dash and checked the connections to the light socket. I wiggled one side, slightly loose but probably not culprit.

I did not have enough time to run the diagnostic. When referencing "repair/replace the harness", is that referring to the hardness in the dash or the primary harness coming to the dash? I guess it could be either or both..

Give me some time. I'll send you the illustration that accompanies the diagnostic above. I did send you the complete electrical schematic previously, correct ..? I would look at that and see how many harness connectors (they are all shown) exist between the component and the electronic control. That's the first place I'd go looking to see if they are tight and clean with no corrosion.

for the purpose of the diagnostic effectively the "wiring harness" is considered to be anything between the electronic monitor system control, and the dash lamp.

Nige said:

Give me some time. I'll send you the illustration that accompanies the diagnostic above. I did send you the complete electrical schematic previously, correct ..? I would look at that and see how many harness connectors (they are all shown) exist between the component and the electronic control. That's the first place I'd go looking to see if they are tight and clean with no corrosion.

for the purpose of the diagnostic effectively the "wiring harness" is considered to be anything between the electronic monitor system control, and the dash lamp.

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Yes Nige, I have the electrical schematic and I appreciate that. I'll admit it's a little Greek to me but I'll study it, if was a site plan it wouldn't be a problem.

I had a mechanic plug the laptop in when I had the other issue and there was a low voltage code logged. The fuel pressure sensor also showed a low voltage code and now the lamp shows a low voltage code. Could there be another issue that is throwing these codes? An alternator going out that is spiking/dropping voltage? The alternator is original with 4k hours on it.

CM1995 said:

Yes Nige, I have the electrical schematic and I appreciate that. I'll admit it's a little Greek to me but I'll study it, if was a site plan it wouldn't be a problem.

I had a mechanic plug the laptop in when I had the other issue and there was a low voltage code logged. The fuel pressure sensor also showed a low voltage code and now the lamp shows a low voltage code. Could there be another issue that is throwing these codes? An alternator going out that is spiking/dropping voltage? The alternator is original with 4k hours on it.

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CM, since this thread has got more into codes and electrical trouble, I better share this. We had a good used 973 last spring that would go wonkey and stop traveling ocassionally, and for sure if the heater or AC was turned on. The main cab ground strap was good and well connected, the Ground Cluster on the other side of the cab near the ECM was well connected. For some reason the continuity between the cluster and the cab ground cable was not very good, not good enough to handle the amps of the heater blower motor. This machine came to our area used and we have no history on it. It may have been a rebuilt fire dammaged machine. Anyway I grounded the Cluster connection to the tractor frame with an 8 ga. wire and the problem went away. Don't know if this will help you or not?
Later Bob

Bob/Ont said:

CM, since this thread has got more into codes and electrical trouble, I better share this.

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Thanks Bob. I was thinking about this thread this morning and the fact I probably needed to change the title in case other members are having error code issues as well.

Back to the 953, appreciate the info. I was suspecting an alternator or other culprit not the wiring harness or component. Like I said before, my forte' is moving the dirt not fixing the machine, so I may be way off. I am just don't want to throw parts and money at something that might not be the issue.

I will check the grounds for corrosion/connections, thanks to Nige I know where they are all located now.

There is a ground in the dash and the headliner. I remember reading a thread here on HEF about a Cat 416 /420 backhoe that someone had electrical gremlins in and turned out it was a bad ground in the headliner. :beatsme

The 030 code came back up today. I shut the loader off and re-started it, ran it for over an hour and it didn't come back on. I am thinking it's the action lamp circuit, probably the bulb or socket that isn't completing the circuit if I understand the diagnostic procedure correctly. I pulled the dash and checked the connections this afternoon at shutdown and the connections were tight. The bulb on the action lamp does have some play in it, which could be the culprit.:beatsme Thoughts?

Second issue - backup alarm. It works intermittently. I replaced the backup beeper a couple of months ago as the original one quit working all together. The replacement is an aftermarket one I bought at the Cat dealer because it was 1/2 the cost of OEM. I cut the factory wiring harness/connector off the old backup alarm and fitted standard round connections to attach to the new alarm.

I check the connections, just the standard post and nut connection and it was a little loose. Tightened the nuts at the connection and still no alarm when I put it into reverse. I didn't run it in reverse for a long distance. Where is the relay/switch that sends the signal while the machine is in reverse to the alarm? Could that be the culprit?

I wouldn't be to concerned over a non-working backup alarm but we are currently working on a high profile commercial project and it needs to work.

Thanks in advance as you all have been a wealth of advice!:drinkup

The backup alarm should be fed from the ECM that controls the travel. Two things about those circuits, they moniter the load(alarm and wire) and will shut it off if it doesn't think the circuit is good( open or shorted) and the alarm is polarity sensitive.
Later Bob

The action lamp is still coming on intermittently. I have code 030, 324.5 and 079. I am going to check the main ground at the cab for corrosion, etc. The lamp and bulb are operational in the dash. Thoughts?

CM, are you still having issues with your backup alarm..? Like Bob says this alarm gets its signal from the ECM and the circuit is monitored by said ECM for both continuity and load. If the "will-fit" back alarm has different enough characteristics to the OEM alarm then the ECM may be detecting an issue in the circuit due to this. Could you get hold of an OEM backup alarm for a test..?

It sounds like you could have 2 different codes, maybe related, maybe not.
MID030 CID324 is the Action Lamp Circuit. There should also be a Failure Mode (FMI) as part of the same code, anything from 01 to 13.
MID079 is the Power Train Electronic Control. Need CID & FMI information for that code.

Someone (could have been Bob/Ont) posted on another thread that in a case he'd seen the issue was ground connections behind the headliner in the cab IIRC.

Thanks for the reply Nige, I hadn't thought of the aftermarket alarm could be the issue. I can rob an alarm off of one of the other Cats and give it a test. I assume an alarm from a 420 or D5 would work?

Come to think of it, I think the error code came up after I replaced the alarm but I've had a lot on my mind lately so that might not be the case.

I am not working on the job the loader is on at the moment, I'll go through diagnostics when I get back there.

Dont know about any one else but were seeing C models that are chafing the harnesses at bolt clamp points and causing intermittent problems and stored but not active codes

HATCHEQUIP said:

Dont know about any one else but were seeing C models that are chafing the harnesses at bolt clamp points and causing intermittent problems and stored but not active codes

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I have had the rear harness replaced, the one that services the right side of the engine. I hope it's not another harness. My C is a BBX model, 2004 MY.

The drivers in the ECM for the back up alarm can fail over time. Re flashing has fixed this by swapping to a different driver circuit.

321 white will be the + wire at the alarm, brown is the ground side. After market alarm should be ok as long as its 24v.

OK I got the codes that are current.

030
0324.5
079
1869.13

That is the order the codes flash on the screen.

Ok, your codes are: -

030 324 05 - Monitor System - Action Lamp - current below normal. Often related a bad contact/cut wire in the lamp signal circuit.
079 1869 13 - Trans control - Speed & Direction Lever Position Sensor - requires calibration. That should be easy as you already have the Scroll, Clear, & Calibrate switches hard-wired into the machine.