Repair questions 2003 International 9400I with a C-15

[CRDIESELMECHANIC]

Completely stumped with issues on a 2003 International 9400I has a C-15 engine . First issue was brake lights would not turn off then gauges quit and while trying to resolve those issues now truck won't start at all when i connect diagnostic then no communication ,it will flash on self diagnostic a 32 code . Any suggestions?

 

[Truck Shop]

32 code is invalid throttle signal. Remove the breakers and or fuses to the lights and accessory fuses to gauges and panel lights. Insert one fuse at a time and operate the lights as you go.
You will find something crossed up in dash harness or just before power distribution box or fuse panel. And disconnect the turn signal switch and see what transpires there.
Does the engine crank but no fire?

Truck Shop

 

[CRDIESELMECHANIC]

Yes it Cranks but it doesn't fire

 

[CRDIESELMECHANIC]

Thank u for replying. I believe you pinpointed my issue and I will be on top of trying that first thing in morning. I appreciate your help

 

[Truck Shop]

Welcome to Heavy Truck Forums, if you don't get an answer here you can also try Heavy Equipment Forums

Truck Shop

 

[rzucker]

Welcome to Heavy Truck Forums, if you don't get an answer here you can also try Heavy Equipment Forums

Truck Shop

Don't the Cats have 3 ECM feeds off the batteries? I would look for hidden fuses, check all battery cnnections and all the frame to engine and cab grounds. Not sure on the Navistars but a lot of other manufacturers hid their fuses behind the frame rail behind the battery box. I recall a 3406E in a Freightliner that barely ran after rotting an ECM connection off at the battery terminal. Not sure if that would affect the brake lights thru the body control module. Just barnstorming here.

 

[Truck Shop]

Don't the Cats have 3 ECM feeds off the batteries? I would look for hidden fuses, check all battery cnnections and all the frame to engine and cab grounds. Not sure on the Navistars but a lot of other manufacturers hid their fuses behind the frame rail behind the battery box. I recall a 3406E in a Freightliner that barely ran after rotting an ECM connection off at the battery terminal. Not sure if that would affect the brake lights thru the body control module. Just barnstorming here.

Those are also good areas to check. Freightliner seems to be the only one I've found that likes to put ECM wires where they will corrode. I think International
uses a power lug on the fire wall,[ that's I think]. One other thing is the cam sensor located behind the top of air compressor. Early ones were were mounted
straight out the side of the front structure near the compressor. Just a guess on that more that likely it's a power/ground issue like RZ said.

Truck Shop

 

[rzucker]

Those are also good areas to check. Freightliner seems to be the only one I've found that likes to put ECM wires where they will corrode. I think International
uses a power lug on the fire wall,[ that's I think]. One other thing is the cam sensor located behind the top of air compressor. Early ones were were mounted
straight out the side of the front structure near the compressor. Just a guess on that more that likely it's a power/ground issue like RZ said.

Truck Shop

A bad cam sensor would let them start but run in derate mode.
If the crank sensor was good. But these issues would show on the diagnostics. I'm sticking with wire issues.

 

[CRDIESELMECHANIC]

Anyone have a circuit diagram for this truck ? I have searched and searched and unable to find one?

 

[Truck Shop]

A bad cam sensor would let them start but run in derate mode.
If the crank sensor was good. But these issues would show on the diagnostics. I'm sticking with wire issues.

Oh I've seen cam sensors go bad at highway speed and shut the engine off just like turning the key off. It's sudden and happens where there is no place to pull off the road.

The electrical diagram you might have to get from Corn Queen. I don't have any on International's maybe someone else on here can tell you where to find one.

Truck Shop

 

[JasonG]

Really sounds like a ground wire to me.

 

[CRDIESELMECHANIC]

What or who is corn queen and how do I contact corn queen? I am new to using these blogs or Internet.

 

[rzucker]

Old timer slang for Navistar. Goes back to the International Harvester days, kinda like "Cornbinder".

 

[CRDIESELMECHANIC]

Ok thank you

 

[CRDIESELMECHANIC]

I am Still stumped any more suggestions.? I was able to solve the issue with the lights staying on ...got them to go off. Did find a weak ground but not understanding that. No data on gauges and truck still turns over but still won't start .

 

[CRDIESELMECHANIC]

The antilock brake module is extremely hot to the touch and the lights stay on constantly asif it has power to it....could this have something to do with my original issues .?

 

[Goodysnap]

Please provide ESN. I cant help you with the OEM side schematic but powers and grounds supplied to the ECM should be the same no matter the OEM. Do you have Cat ET and can you communicate with the ECM? Get me a ESN and I'll see if I can get the pin locations for you. Ultimately if the powers and grounds to the ECM are good with good fuel pressure you likely have a failed ECM. ECM failures usually will have loss of communication.