2010 Hyundai Genesis Coupe 3.8L GT no start

B_Kappler2

New member
2
0
1
Genesis Model Type
1G Genesis Coupe (2009-2016)
My car won’t start, when I go to turn on the car (push button start) the engine light starts to blink and he immobilizer light appears, the relays under the hood also start ticking at the same rate the engine light flashes. I’ve tried a new car battery, fob battery, new terminals for the battery, checked to make sure all connections were tight and checked the fuses and it still won’t seem to start. Does anyone know what could be wrong ? I’m starting to think antenna module or either the brake or clutch switch.
 

Easy

Registered Member
19
9
3
Genesis Model Type
1G Genesis Sedan (2009-2014)
1. No where in your post do you mention checking battery voltage.

2. When you push that button, it sounds distinctly like a low battery and a starter getting low juice.

Check your voltages and report back.

E
 

B_Kappler2

New member
2
0
1
Genesis Model Type
1G Genesis Coupe (2009-2016)
1. No where in your post do you mention checking battery voltage.

2. When you push that button, it sounds distinctly like a low battery and a starter getting low juice.

Check your voltages and report back.

E
The battery in the car is good
 

emebarak

Hasn't posted much yet...
3
0
1
Any news yet? Experienced same!
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Easy

Registered Member
19
9
3
Genesis Model Type
1G Genesis Sedan (2009-2014)
emebarak, why not start another thread stating your problem and giving, as I suggested to the OP here, the voltages and where measured.

Stating for instance, the *Battery in the car is good* tells us nothing really.
 

mylesgen

New member
3
0
1
Genesis Model Type
1G Genesis Coupe (2009-2016)
I’m having the exact same problem with my 2010 3.8 it starts ticking by th ecu main relay\fuse by the fuse box closest to the battery. And engine light ticks. When I start my car it sounds like a bad starter with a damaged flywheel D6C69BED-9372-443E-8A57-A9753A4A51E8.jpeg F338CF17-2359-4041-B643-F91E27D9AA84.jpeg
 

Osmocene

New member
1
1
3
Genesis Model Type
1G Genesis Coupe (2009-2016)
I had the same problem with my 2010 380 GT a year ago. After a few attempts to start it with a jumper box, even the dash displays died. The tow-truck operator initially insisted I had a bad battery, but the battery was only a year old and in good condition, so I wasn’t convinced! The culprit was the grounding strap, which is not the usual flexible cable, but a set of rigid, connected segments. Mine had corroded at an attachment point under the transmission. $120 to diagnose, $35 to replace. Presumably a more frequent problem here in the northeastern U.S., where they salt the roads in winter.
 

mylesgen

New member
3
0
1
Genesis Model Type
1G Genesis Coupe (2009-2016)
I had the same problem with my 2010 380 GT a year ago. After a few attempts to start it with a jumper box, even the dash displays died. The tow-truck operator initially insisted I had a bad battery, but the battery was only a year old and in good condition, so I wasn’t convinced! The culprit was the grounding strap, which is not the usual flexible cable, but a set of rigid, connected segments. Mine had corroded at an attachment point under the transmission. $120 to diagnose, $35 to replace. Presumably a more frequent problem here in the northeastern U.S., where they salt the roads in winter.
Hey thanks for the reply!!! I live in the Caribbean so salt is in the air. The first problem I had before this all went downhill was because of a bad ground the black wire that connects to the ground on the battery. It was very loose. So loose you could slide it off the ground with your hands. Maybe that short Circuit My car. I ordered a brand new pdm and ecu and will program them tomorrow and will give that a try. Thanks for your reply !!! Will add to list of things to check. 👍🏽👍🏽👍🏽
______________________________
 

rlgoad65

New member
2
0
1
Genesis Model Type
Genesis Coupe
I’m having the exact same problem with my 2010 3.8 it starts ticking by th ecu main relay\fuse by the fuse box closest to the battery. And engine light ticks. When I start my car it sounds like a bad starter with a damaged flywheel View attachment 21808 View attachment 21809
Did you ever get this problem fixed ? I replaced head gaskets after repair when attempting to crank i get exactly what you describe . i did not remove any ground wires . i have full battery charge 12.19 . after checking the ground signal wire to main relay ecu relay brown in color it provides grounding to energize relay coil ,ohms out good all grounds at computer check good yet when car turned on the relay signal wire jumps up and down in grounded voltage . this pattern is coming from computer itself . Any ideas ?
 

millemk

New member
5
2
3
Minnesota
Genesis Model Type
Genesis G80 Ultimate
Did you ever get this problem fixed ? I replaced head gaskets after repair when attempting to crank i get exactly what you describe . i did not remove any ground wires . i have full battery charge 12.19 . after checking the ground signal wire to main relay ecu relay brown in color it provides grounding to energize relay coil ,ohms out good all grounds at computer check good yet when car turned on the relay signal wire jumps up and down in grounded voltage . this pattern is coming from computer itself . Any ideas ?
A full battery charge will read somewhere near 12.7 bolts, so 12.2 volts may indicate a 50 percent charge. Recommend adding battery charger to see if you can achieve full charge.
 

rlgoad65

New member
2
0
1
Genesis Model Type
Genesis Coupe
A full battery charge will read somewhere near 12.7 bolts, so 12.2 volts may indicate a 50 percent charge. Recommend adding battery charger to see if you can achieve full charge.
installed new battery . added grounds and checked all grounds . jumped starter circuit at relay and starter sytem works fine unless you use key then it sounds bad . seems as tho theres a voltage to ecu relay and starter relay signal line that bounces and causes relay to not stay engaged.
 
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