Question about Hyundai Motor 2003 XG350

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9@how to fix dtc p1178 and p1118 on a 2002 hyundai xg350

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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.

Posted on Apr 23, 2013

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Posted on Jan 02, 2017

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d_hubbs
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SOURCE: need to know what these

Hi Friend:

In checking your Codes heres the Data.

#1) P1118 -->> this code is sending a signal that your ETCS =Throttle Motor is Either Damaged or it has Failed.

#2) P1110-->> this code is showing that your PCM (Control Module) has received a Signal that your you have a problem with your Throttle Body.

#3) P1178-->> this Code is Indicating that Your Electronic Throttle Motor Battery has a Open Circuit.

Sir, I would start checking your Fuses before you Spend a Bunch of Uneccessary money. It could be that your ETCS Fuse is blown, This could be causing All these Codes.but theres is still a chance that you'll get a Code after changing the ETCS Fuse.

Note: you have Fuse Blocks inside your Vehicle and Under your Hood as well, They'll be Labelled Fuses and Relays.

I hope this Fuse solves ALL your Problems sir.Please let me know how my Solution has helped you by Voting for me and a Testamony would be Appreciated.

Thank You for Using FixYa From: d_hubbs

Posted on Aug 17, 2010

  • 24 Answers

SOURCE: 1996 jaguar xj6 dtc test code p1178

Fault code P1178Rich Fuelling Trim, Long Term (AMFR)Check for manifold air leaks, rectify as necessary Check for recorded MAFS fault code, rectify as necessary Clear fault code and perform service drive cycle to verify fault cleared Contact Jaguar Service Hotline if fault still present.

Taken from the Jag service manual.

Posted on Mar 30, 2010

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1 Answer

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