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Questions & Answers
[email protected] to fix dtc p1178
I live in Australia & have a Hyundai Grandeur XG 3LT V6 2002 model (US equivalent is Hyundai XG300).
Fault codes are P1118 (ETS motor fault) & P1178 (ETS motor battery voltage open). An intermittent fault.
The first code denotes general area of the fault & the second code denotes the specific fault.
So the specific fault is that the ETS-PCM computer is not receiving 12V on pin 2 with ignition on.
'Check engine' light remains on & car is in 'limp home mode' with very little power & poor performance.
I had purchased the Hyundai service manual online (ebook about $8) for the US model. Could not find any
manual for the Australian model. On page FLA-52 found the block diagram for the whole ETS system.
I am a retired electrical engineer so now it became easier for me to find the fault.
There are 2 computers behind the center console. PCM & ETS-PCM.
Pin 2 of the ETS-PCM should have 12V present when ignition is on.
In fault mode 12V was not present. This 12V is supplied from ETS 15A fuse (fuse box under dashboard)
via a relay (i will call this relay the ETS relay). The 15A fuse was OK but the 12V was only
intermittently being passed through the relay points. Relay is located near ignition switch on a
sub panel which has about 6 relays on it. ETS relay was at right bottom corner of sub panel.
Yellow wire feeds the 12V (which is always present even with ign. switch off) to the relay points.
White wire is the output wire from the relay points which feeds 12V to pin 2 of the ETS-PCM computer.
Measure if 12V is present at white wire when ign. switch is turned on (no need to start engine)
I only had the 12V present intermittently. So pulled out the ETS relay - tested contacts with
ohmmeter & found to be only making contact intermittently when relay lever depressed
- removed relay case by grinding away one corner of the case - cleaned the relay points with fine sandpaper.
replaced the relay case & taped with black insulating tape to keep out dust. Tested relay with ohmmeter & points
now OK. Fault is now cleared & car is operating normally.
Also had previously purchased on Ebay a Can OBD11 scanner for $15 which read the fault codes OK.
Hope this helps other people with similar problem.
on Sep 16, 2018
Disable alarm without remote on hyundai 2003 XG350L
You must have a spare key. When your alarm is going off have your key in the ignition, wait it out. When your alarm stops in approximately 30 seconds keep the key in the ignition exit the vehicle and lock the doors (don't forget your spare key). Go to the passenger door with the spare key and unlock the doors and turn the key that you left in the ignition and it should start right up. Just worked for me.
on Jun 08, 2016
Why is the brake light and the battery light on
When this happens, there is no charging system voltage (from the alternator). Several possible causes
1. Alternator's regulator has stopped working
2. Alternator fuse (100 to 120 amp) is blown (at battery post or inside Fuse/Relay box under the hood)
3. Wiring between alternator & battery &/or fuse/relay box.
on Jan 09, 2016
How to set nonadjustable camber?
all wheel alignments have a camber adjustment
for vehicles with a strut suspension it is in the 3 or 4 bolts that hold the top bush/(rubber mount ) on the inner guard
Those bolts are not concentric but if moved around 1 hole setting at a time will alter the camber and castor of the alignment
If there is insufficient adjustment there , then there is a lower arm or control rod out of adjustment
on many cars with strut suspension that arm that goes from the body to the lower control arm will also affect the wheel alignment , especially if the rubber mounts are bad
have it checked by an accredited specialist suspension shop
on Jan 02, 2016
Pumping fuel into the car takes forever ,and gas backflows
Fuel Backing up in the fill nozzle is most often caused by a restricted fuel tank vent line. This vent line runs from the tank to a charcole filter that stores the tank vapors while still allowing air to pass. It is typically located in the engine compartment. Look for a pinched hose first in the engine compartment. Typical hose diameter is 10 mm or less. If you have had recent work done on the car in the fuel tank area, this also may have resulted in the line being pinched or rerouted in error.
on Dec 24, 2014
Can't find the starter on my 2003 xg350 hyundai.
hi from uk to locate starter motor just follow the positive/red cable that fits to battery positive post to the other end of this cable it will lead you to the starter motorsolenoid and starter itself if you intend workingon/removing starter etc ?? you must 1st disconnect the battery earth connection lead make sure you know radio code b4 disconnecting battery ? if you are having problem with starter ?? why not give symptoms on this board we may be able to advise b4 you spend unnecessary $$$ s ??
on Dec 04, 2014
Why didn't you google your codes & read up?
The 302 is a cylinder misfire
The 431 is a worn out or ruined exhaust converter from the misfires
The 734 is a 4th gear incorrect ratio-mostly a failing trans
I would suggest we go no farther & you part with it while you can
If you had no trans issues-- I would say you have a neglected but
With the cost of trans repair & a 2003 wouldn't spend any money
on Jul 17, 2014
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