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Mark23290
Senior Member
United States
96 Posts |
Posted - 10/13/2015 : 06:55:44 AM
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I have a 04 Freigtliner Cat c7 was running fine then just stopped. Cranks over will not fire. Checked the fuses at the battery and the relay in the side panel. On the dash with key in on position the odometer screen reads No eng.
Got fuel last night but have put on 40 miles since and the bus was running fine till it just died in the middle of the road. I'm a private contractor and we are short good mechanics around here, the one place I called said he had to tow a c7 to cat for diagnosis. Others say they don't have software and others just want to replace any part..
Any help is greatly appreciated or if you can steer me in directions to look? |
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tigger2
Advanced Member
USA
469 Posts |
Posted - 10/13/2015 : 08:36:21 AM
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The fuses are in the block behind the dash above the front rt. heater box. wiring goes through the bulkhead to the left to the ECM check for rubbed through wires. could possibly have lost the communications J1939 connection. very hard to check out without software. check the obvious oil level, fuel level, coolant level, try to pump the primer to see if fuel is primed. |
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Mark23290
Senior Member
United States
96 Posts |
Posted - 10/13/2015 : 08:42:44 AM
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Can you tell me where the primer is? The ecm is that in the dash? Do you know what fuse is the ecm in that panel? It's not marked. I do notice the check engine light doesn't come on when I turn the key on? Thank you so much for the input. |
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Mark23290
Senior Member
United States
96 Posts |
Posted - 10/13/2015 : 08:58:19 AM
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Can you tell me where the primer is? The ecm is that in the dash? Do you know what fuse is the ecm in that panel? It's not marked. I do notice the check engine light doesn't come on when I turn the key on? Thank you so much for the input. |
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Thomasbus24
Administrator
USA
4544 Posts |
Posted - 10/13/2015 : 09:00:42 AM
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ECM is mounted on the side of the engine. Primer (if equipped) will be right on top of the fuel filter on the side of the engine on that chassis. Unscrew and pump. If there's a blank plate with two bolts in it, then it's an option you didn't get :( |
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Mark23290
Senior Member
United States
96 Posts |
Posted - 10/13/2015 : 10:12:45 AM
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On the dash I found these readings, fault 1, fail 07 , s1d254, no eng. this is on the odometer readout. Anyone know what it's trying to tell me? |
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tigger2
Advanced Member
USA
469 Posts |
Posted - 10/13/2015 : 11:41:38 AM
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I don't know if you can see it but the circuit board in the front of the dash is split in two parts board one is on the left and board two is on the right, the fuses are in two rows top row is 1,3,5,7,9 and bottom row is 2,4,6,8,10 fuel solenoid fuse is #2 in first board. |
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Mark23290
Senior Member
United States
96 Posts |
Posted - 10/13/2015 : 1:20:26 PM
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quote: Originally posted by tigger2
I don't know if you can see it but the circuit board in the front of the dash is split in two parts board one is on the left and board two is on the right, the fuses are in two rows top row is 1,3,5,7,9 and bottom row is 2,4,6,8,10 fuel solenoid fuse is #2 in first board.
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aaronwilmoth80911
Top Member
538 Posts |
Posted - 10/13/2015 : 9:06:01 PM
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A quick Google search turned up some good info. Unfortunately the info I could find seems to point to an ABS problem with the 254 code. I'll take a look at my CAT book tomorrow and see if I can turn up anything else. Not having software can make this really tricky to diagnose. Here's a link to what I found.http://www.autobusthomas.com/pdf/MASTER_Fault_Codes_Combined_2013_2013.01.23.pdf |
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tigger2
Advanced Member
USA
469 Posts |
Posted - 10/14/2015 : 04:02:46 AM
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The Cat book stops at code 253 chassis manufacturer parameter not programed. I think there is no power to the ECM and no communications to the chassis. |
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Mark23290
Senior Member
United States
96 Posts |
Posted - 10/16/2015 : 1:42:30 PM
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Cat dealer says it's the ecm, said it probably shorted out when the inline heater relay went bad. He said 95% of them short out after this.... At a tune of 3800 bucks :(... Does this sound right? |
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aaronwilmoth80911
Top Member
538 Posts |
Posted - 10/16/2015 : 4:03:36 PM
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$3800 does not sound right, unless CAT is doing the ECM for you. We did an ECM 6 months ago for $1700ish |
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Mark23290
Senior Member
United States
96 Posts |
Posted - 11/06/2015 : 08:57:21 AM
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Just an update, The Cat dealer replaced the ECM and a relay which is on the drivers side of the engine towards the firewall which they said is a relay for the intake heater. They said this fried so it caused the ecm to short. My question is how can this be prevented in the future? If the relay is to go bad again. After about 4k and week in the shop it is back, seems to not be as peppy at take off but maybe its me.
Thanks again for all the advise though, this forum sure does rock. Exp. when your not a mechanic.
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