Fenix Nexen
Well-Known Member
Can confirm that the four fuses after the run/crk relay becomes 12v when the key is switched on. The fuse labeled INJ is also getting 12v. This is good news I suppose?
Fenix's Goblin #461 - 2010 Base Auto
- Thread starter Fenix Nexen
- Start date
The first step I would take in troubleshooting this would be to trace every wire on the wiring diagram and check continuity from one end to the other. It will take a few hours but that will confirm you have a good base. I would start at the key and work from there. Might not find the problem but got to start somewhere.
Ross
Goblin Guru
Yes, good news. I am having difficulties on where to start on this issue too. Makes me want to go back to the OBDii codes.
Codes are..
P0102 MAF sensor circuit low frequency
P0113 IAT sensor circuit high voltage
P0449 EVAP Vent solenoid valve control circuit
P0452 fuel tank pressure sensor circuit low voltage
P0443, P0449 The evap codes are because we eliminated the evap system. The other 3 codes cause me concern.
P0102 MAF sensor... could be the The 10amp EXH fuse. MAF is facing the correct direction? Anks329 flipped it (the MAF) around and cleared this code and the P0113 code.
P0113 IAT sensor... The MAF also contains the intake air temp sensor. Maybe the P0102 and this are related.
The MAF sensor is the same electrical connector as the fuel injectors... It is easy to mix up these swappable electrical connectors.
P0452 Well, this code didn't stop my engine from running.
All what share the same ground? The IAT sensor is grounded through the ECM.
Joebob
Goblin Guru
Not the best video, but what I am talking about. ECM is grounded through the plug to the block.
Joe
Fenix Nexen
Well-Known Member
Ross
Goblin Guru
Guess we will have to keep looking. The MAF reversal doesn't apply to your engine, and the electrical plug isn't it either.I grounded the TCU and ECU and nothing changed and the EXH fuse is getting 12v
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You did find an electrical plug that wasn't plugged in! Clear the OBDii codes, and try starting it again? I'm not sure what that plug does, but it had to do something. Pull the OBDii codes again, and see if anything has changed.
Check for more missing plugs... that is what got my LSJ to start the first time... a missing plug on a sensor.
Fenix Nexen
Well-Known Member
No change sadly, also confirmed that I am indeed in park and pressing down the brake doesnt change anything.
Also IAT reading 104 degrees, i have a new maf installed too, testing wiring tomorrow i guess
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Fenix Nexen
Well-Known Member
I hooked up a button switch to jump the relay, this time with the relay still in and...
It starts! but then putters out after a moment as to be expected
Where do I go from here?
edit: sticking this connector view here for later
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I can't see the video at work, and typically wont watch them anyway as I don't think they are good way to handle technical discussions.
If the jumping the relay got it to actually run, you need to use the wiring diagram to work your way up the chain to figure out where the power or signal is lost, depending on how you jumped the relay.
If the jumping the relay got it to actually run, you need to use the wiring diagram to work your way up the chain to figure out where the power or signal is lost, depending on how you jumped the relay.
Fenix Nexen
Well-Known Member
I just noticed that all the dials on the gauge drop and twitch downwards when the engine starts
I will get to work on some diagrams
I will get to work on some diagrams
Not necessarily a problem, especially if your battery is a little weak.
TravMac
Well-Known Member
I'm pretty sure they are turn signal wires (just went to my car and realized it was all taped up for "water proofing", so 90% confident).
Have you tried to swap relays? It seems like key wants to try if your gauge is also dropping as if there's a voltage change. There are more unique issues I've come across in cars, but got to start simple first. With lots of the electrical testing, may be a good idea for a trickle charger too if you don't already have one on there.
The running issue when you do jump it might be MAF too. It starts, doesn't see airflow, can't figure out what to do, and dies. I'm just thinking out loud. Sounds like you may not have the part to test that yet anyways, so getting the key up should be the main focus still.
This one is a real interesting puzzle!
Fenix Nexen
Well-Known Member
Is it too late to end the harness to df? Heh..
I ran it a few dozen times and nothing changed. It got really hot outside so I didn't get any wire testing done
I ran it a few dozen times and nothing changed. It got really hot outside so I didn't get any wire testing done
Fenix Nexen
Well-Known Member
Yellow wire from bcm to run/crnk.. with one probe on x1 15 and the other on x5 b4... tested for continuity and it beeps... It also beeps when moving the probe from x1 15 to the nearest ground post??? Is that to be expected? Or maybe I tested it incorrectly