Temperature sensor and ECM

Tiny
CID6688
  • MEMBER
  • 2015 KIA RIO
  • 1.2L
  • 2WD
  • MANUAL
  • 607,880 MILES
Description of Problem: I scan. P0118 KIA - engine coolant temperature sensor 1 circuit high input. Well, sir, my cooling fan has broken down. Now I replaced a new assemble cooling fan when I started the engine simultaneously with the cooling function it did not trip off. The A/C was not cool too. Even the temperature gauge is not working. Now I replaced the new temperature sensor. I still have the same result. The other mechanic said the engine computer module might be faulty. Then by checking the ECM there is only 3.28 voltages on the ECM going to the temperature sensor and there is nothing like continuity connection. Sir it is possible the ECM is so broken sir. Thanks
Friday, February 2nd, 2018 AT 6:24 PM

16 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Okay, there is supposed to be a five volt signal sent to the sensor and the other wire is the return to the ECM.

If the connector does not have five volts, then I would check the ECM connector in the attached diagram. If the five volts is not present at the output of the ECM, then yes, it needs an ECM.

Roy
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Saturday, February 3rd, 2018 AT 5:16 AM
Tiny
CID6688
  • MEMBER
  • 9 POSTS
Sir, I check the ECM but there is only 3.28 voltages on the ECM. Is that enough?
Was this
answer
helpful?
Yes
No
+1
Saturday, February 3rd, 2018 AT 6:29 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
No, five volts is what the reference voltage should be.

If you only have 3.28 volts, then the ECM has failed.

Roy
Was this
answer
helpful?
Yes
No
+1
Saturday, February 3rd, 2018 AT 6:33 AM
Tiny
CID6688
  • MEMBER
  • 9 POSTS
Okay sir, thank you so much.
Was this
answer
helpful?
Yes
No
Saturday, February 3rd, 2018 AT 6:36 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
You are welcome. We are here to help.

Roy
Was this
answer
helpful?
Yes
No
+1
Saturday, February 3rd, 2018 AT 6:37 AM
Tiny
CID6688
  • MEMBER
  • 9 POSTS
Last question sir. Can ECM be repaired?
Was this
answer
helpful?
Yes
No
Saturday, February 3rd, 2018 AT 6:39 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
No, you need special equipment for that. You need a new ECM, then it needs to be flashed or programmed to your car and keys.

Roy
Was this
answer
helpful?
Yes
No
+1
Saturday, February 3rd, 2018 AT 6:41 AM
Tiny
CID6688
  • MEMBER
  • 9 POSTS
Hi sir. I have a question again. If the temperature sensor's voltage dropped, will it affect the aircon as well?
Was this
answer
helpful?
Yes
No
Saturday, February 3rd, 2018 AT 7:20 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
No, not at all. The only time is if the engine is severely overheating, the compressor will be disabled.

Roy
Was this
answer
helpful?
Yes
No
+1
Sunday, February 4th, 2018 AT 5:34 AM
Tiny
CID6688
  • MEMBER
  • 9 POSTS
How about the temperature gauge and the cooling fan? Will they get affected if ECM voltage drops?
Was this
answer
helpful?
Yes
No
Sunday, February 4th, 2018 AT 5:45 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
If the ECM voltage drops to the ECM, then nothing will work correctly.

A scan tool that reads OBD1 systems can read these voltages.

Roy
Was this
answer
helpful?
Yes
No
+1
Sunday, February 4th, 2018 AT 7:08 PM
Tiny
CID6688
  • MEMBER
  • 9 POSTS
Hi sir this is my ecu faulty with parts #39117-03012
And I replace defferent parts # 39117-03002
It is ok for my car?
Images (Click to make bigger)
Thumb
Thumb
Thumb
Thumb
Thumb
Thumb
Was this
answer
helpful?
Yes
No
Wednesday, February 7th, 2018 AT 4:00 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
No, the numbers must be the same. If you install the other one, it may not work at all.

Roy
Was this
answer
helpful?
Yes
No
Wednesday, February 7th, 2018 AT 4:02 AM
Tiny
CID6688
  • MEMBER
  • 9 POSTS
Thank you sir roy, I can not buy it here in our area. Need to buy online
Was this
answer
helpful?
Yes
No
Wednesday, February 7th, 2018 AT 4:11 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Ok,
Check this site. Www. Car-part. Com
Was this
answer
helpful?
Yes
No
Wednesday, February 7th, 2018 AT 4:37 AM

Please login or register to post a reply.

Related Engine Computer Read Code Content

VIEW MORE