Dtc p1316

[04MT]

This is on my 03 550 with a 7.3. I have been doing some maintance on my truck, replaced the parking brake assy (PCM removed) changed oil to Mobil One 5-40 synthetic, fixed exhaust leaks on manifolds, and tightened up the emergency brakes. The truck ran great after the parking brake stuff so I think the PCM connection is fine. Truck also runs way better with the exhaust leaks all fixed up. I did the oil change yesterday and today when driving around running some errands the truck starts to miss and I get a CEL. I used my flashpac to get the codes which I had 4 of...3 are from the flashpac and the exhaust brake but the P1316 was a new one to me.

I stopped by the dealership and was told that the connection inside the valve cover probably took a shit and the tech gave me a couple wedges to put on the connector inside the valve cover. I told the tech that it feels like an injector took a dump and asked him if it had something to do with the oil change. He said probably not and that he's 90% sure it's that connection. He told me to do the glow plug test on the outboard pins and if that didn't check out it was for sure the connection. I did the test and all 8 glow plugs test fine.

My plan is to go ahead and pop the valve covers off and try the wedges unless anyone has any better ideas. Truck is a 03 550 4X4 6 speed with a 7.3. 150,000 miles dino oil was changed every 3,000 miles and synthetic was just started less then 10 miles ago. I have owned the truck since new.

[PSDPlayer]

FJ9 DIAGNOSTIC TROUBLE CODE (DTC) P1316 INDICATES THAT CODES ARE STORED IN THE IDM


Possible causes:

Injector(s) or circuit(s)
Open or shorted IDM enable circuit
Open/short in EF circuit
Open/short in FDCS circuit
IDM relay
IDM powering circuits
IDM
PCM

Check for other codes.
Key on, engine off.
Perform KOEO On-Demand Self Test.
Are IDM or any other codes stored?
<TABLE border=1 cellSpacing=0 cellPadding=3 width="92%"><TBODY><TR><TH width="50%">Yes </TH><TH width="50%">No </TH></TR><TR><TD width="50%">GO to the appropriate pinpoint test. </TD><TD width="50%">GO to FJ10 . </TD></TR></TBODY></TABLE>

[PSDPlayer]

FJ10 DTC P1316 OR P1670, CHECK FOR AN INTERMITTENT OPEN CIRCUIT


Key off.
Install breakout box, leave PCM disconnected.
Disconnect IDM.
Check for intermittent open in the following circuits:

Measure resistance on (FDCS) circuit 821 (BR/OG) between IDM connector pin 17 and PCM test pin 95.
Measure resistance on (EF) circuit 818 (GY/WH) between IDM connector pin 4 and PCM test pin 48.

Grasp the harness close to the IDM connector. Wiggle, shake the harness while working your way back to the PCM, while looking for a spike on the DVOM.
Do all readings remain below 5 ohms throughout procedure?
<TABLE border=1 cellSpacing=0 cellPadding=3 width="92%"><TBODY><TR><TH width="50%">Yes </TH><TH width="50%">No </TH></TR><TR><TD width="50%">GO to FJ11 . </TD><TD width="50%">REPAIR open in the suspect circuit. RESTORE vehicle. CLEAR DTCs and RETEST. </TD></TR></TBODY></TABLE>

[PSDPlayer]

FJ11 CHECK FOR AN INTERMITTENT SHORT TO GROUND


Check for intermittent short to ground on the following circuits:

Measure resistance on (FDCS) circuit 821 (BR/OG) between battery ground and PCM test pin 95.
Measure resistance on (EF) circuit 818 (GY/WH) between battery ground and PCM test pin 48.

Grasp the harness close to the IDM connector. Wiggle, shake the harness while working your way back to the PCM, while looking for a spike on the DVOM.
Do all readings remain above 10,000 ohms throughout procedure?
<TABLE border=1 cellSpacing=0 cellPadding=3 width="92%"><TBODY><TR><TH width="50%">Yes </TH><TH width="50%">No </TH></TR><TR><TD width="50%">GO to FJ12 . </TD><TD width="50%">REPAIR short to ground on the suspect circuit. RESTORE vehicle. CLEAR DTCs and RETEST. </TD></TR></TBODY></TABLE>

[PSDPlayer]

FJ12 CHECK FOR AN INTERMITTENT SHORT TO POWER


Key on, engine off.
Check for intermittent short to power on the following circuits:

Measure voltage on (FDCS) circuit 821 (BR/OG) between battery ground and PCM test pin 95.
Measure voltage on (EF) circuit 818 (GY/WH) between battery ground and PCM test pin 48.

Grasp the harness close to the IDM connector. Wiggle, shake the harness while working your way back to the PCM, while looking for a spike on the DVOM.
Did voltage ever appear on any circuit throughout procedure?
<TABLE border=1 cellSpacing=0 cellPadding=3 width="92%"><TBODY><TR><TH width="50%">Yes </TH><TH width="50%">No </TH></TR><TR><TD width="50%">REPAIR short to ground on the suspect circuit. RESTORE vehicle. CLEAR DTCs and RETEST. </TD><TD width="50%">GO to FJ13 . </TD></TR></TBODY></TABLE>

[PSDPlayer]

FJ13 VERIFY DTC P1316 AND/OR P1670


Restore vehicle.
Clear DTCs.
Cycle key off, than start engine.
Road test vehicle.
Perform KOEO On-Demand Self Test and retrieve Continuous DTCs.
Was DTC P1316 and/or P1670 set in Continuous without any codes in KOEO On-Demand?
<TABLE border=1 cellSpacing=0 cellPadding=3 width="92%"><TBODY><TR><TH width="50%">Yes </TH><TH width="50%">No </TH></TR><TR><TD width="50%">GO to FJ14 . </TD><TD width="50%">REPAIR KOEO On-Demand DTCs. RESTORE vehicle. CLEAR DTCs and RETEST. </TD></TR></TBODY></TABLE>

[PSDPlayer]

FJ14 ATTEMPT TO GENERATE IDM DTCS


Key off.
Disconnect one valve cover connector.
Start engine to generate IDM codes.
Perform KOEO Injector Electrical Self Test and KOEO On-Demand Self Test.
Are IDM codes retrieved?
<TABLE border=1 cellSpacing=0 cellPadding=3 width="92%"><TBODY><TR><TH width="50%">Yes </TH><TH width="50%">No </TH></TR><TR><TD width="50%">INSTALL a new PCM, RESTORE vehicle. CLEAR DTCs and RETEST. </TD><TD width="50%">INSTALL a new IDM. RESTORE vehicle. CLEAR DTCs and RETEST. </TD></TR></TBODY></TABLE>

[PSDPlayer]

And what were the other codes?

[04MT]

And what were the other codes?

P0603, P0475, and P1211

[PSDPlayer]

<TABLE border=1 cellSpacing=0 cellPadding=3><TBODY><TR><TD vAlign=top align=middle>P0603</TD><TD vAlign=top align=left>Internal Control Module KAM Error</TD></TR></TBODY></TABLE>

<TABLE border=1 cellSpacing=0 cellPadding=3><TBODY><TR><TD vAlign=top align=middle>P0475<SUP>a</SUP></TD><TD vAlign=top align=left>Exhaust Pressure Control Valve Malfunction</TD></TR></TBODY></TABLE>

<TABLE border=1 cellSpacing=0 cellPadding=3><TBODY><TR><TD vAlign=top align=middle>P1211<SUP>a</SUP> <SUP>b</SUP></TD><TD vAlign=top align=left>ICP Not Controllable — Pressure Above/Below Desired</TD></TR></TBODY></TABLE>

The first and third ones are probably from a tuner. The second one is bullshit and most 7.3Ls have that permanently. It's from the crappy pedestal mounted EBP sensor and actuator.

[04MT]

Yeah, I use my EBPV as a exhaust brake. So is it worth popping the covers off and trying the wedges? I will check the PCM connection to be sure also. Thanks for the troubleshooting guide.

[PSDPlayer]

Follow the pin point tests. And use the trailer brakes instead of the engine.

[04MT]

Trucks fixed! Ok heres the story, I was in a hurry this morning and forgot my multimeter and my laser thermometer at home. I got to work and fired up the 7.3 and it was fine, let it warm up for about 15 minutes and took it for a quick drive to see if the CEL would come on. It came on in less then a mile so I headed back to the shop to do the glow plug test so I could isolate which side I needed to work on.

All the glow plugs tested fine so I got a case of the fuck it's and took it to the dealer. I figured if I popped the covers and it wasn't the wiring harness I was gonna have to put it back together and take it to the dealer anyway, my heart just wasn't in it today I guess.

The dealer called around noon and said the #7 injector wasn't working, I told them it wasn't the injector, it was gonna be the harness and sure enough they called me a couple hours later and said a wedge would fix it and wondered if I wanted them to do the other side also. I said go ahead and do both. So thats my story, trucks fixed but I cant take credit for it. Thanks Doug for the trouble shooting flow chart though.

[PSDPlayer]

You will want to get yourself some harnesses and the valve cover gaskets. The wedges might fix it for now but if it does decide to get worse those harnesses will melt one day.