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1G 1.8L 4g37 Overheating and Fault Code 13

SouthpawsEclipse

Probationary Member
10
0
Aug 13, 2022
Athens, Georgia
Hello. I have an overheating problem on my 1g 4g37. help plz.
Have error Code 13.
+
Radiator fan works but does not turning on automatically.

Thermostat is good but it does not openning

Have Circulation problem i think.
What could be the reasonand and how i can fix it
 
Last edited:

AWD-Tony

Supporting Member
6,649
3,518
Sep 11, 2017
Cincinnati, Ohio
Passengers side fan
This comes on when coolant temp switch located at the bottom of the radiator reaches a certain temp.
You must be logged in to view this image or video.

You can remove this connector and jump the wires on the connector to bypass the switch. If this turns on the fan, it need a new sensor.

Drivers side fan
This fan only turns on when you turn the ac on.
 

SouthpawsEclipse

Probationary Member
10
0
Aug 13, 2022
Athens, Georgia
Fill out your vehicle profile. Edit your post to read better, like this:

Hello. I have an overheating problem on my 1g 4g37. Possible reasons are the radiator fan not working as well as a code 13 when the ecu is scanned. The air conditioning appears to work.
Forgive for my English. Thanks for help
 

SouthpawsEclipse

Probationary Member
10
0
Aug 13, 2022
Athens, Georgia
Passengers side fan
This comes on when coolant temp switch located at the bottom of the radiator reaches a certain temp.
You must be logged in to view this image or video.

You can remove this connector and jump the wires on the connector to bypass the switch. If this turns on the fan, it need a new sensor.

Drivers side fan
This fan only turns on when you turn the ac on.

Thanks! I did it as you said. And fan is working but engine still overheating.

Any other idea? What could be the reason?
 
Last edited by a moderator:

luv2rallye

DSM Wiseman
8,337
1,120
Jun 7, 2003
Minneapolis, Minnesota
Flush your cooling system (I also do a reverse flush). Here's how on a Toyota but the principle is the same. If that doesn't work you may need a new radiator.
You must be logged in to view this image or video.
.
 
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