Fuel gauge vs DIC fuel range
Thread Starter
Le Mans Master
Joined: Jun 2016
Posts: 5,431
Likes: 3,991
From: Cincinnati, OH
Fuel gauge vs DIC fuel range
Does anyone know if the two are related or if they pull signals from different sources?
I ask because my car will seemingly read different fuel levels on the gauge depending on how I start the car.
Method 1:
Get in and start car right away. (This way you interrupt the initial full sweep of the needle).
Method 2:
Get in turn key over and let gauge needle sweep full then sweep back and settle on fuel level THEN start the car.
Does the DIC fuel range calculate miles based on the needle reading on the gauge? Or does it pull signal directly from something in the tank itself?
I know these cars can have potential non working or intermittent fuel gauges and IF that happens I'd like to know that I can still reference the DIC range values in the meantime.
I ask because my car will seemingly read different fuel levels on the gauge depending on how I start the car.
Method 1:
Get in and start car right away. (This way you interrupt the initial full sweep of the needle).
Method 2:
Get in turn key over and let gauge needle sweep full then sweep back and settle on fuel level THEN start the car.
Does the DIC fuel range calculate miles based on the needle reading on the gauge? Or does it pull signal directly from something in the tank itself?
I know these cars can have potential non working or intermittent fuel gauges and IF that happens I'd like to know that I can still reference the DIC range values in the meantime.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
The fuel gage uses PCM data to display fuel level information. The PCM gets/ uses data from EACH tank level sensor to calculate how much fuel is in the tanks.
The IPC receives that data and also provides a data signal to the HUD. The HUD just displays a digital representation of what the IPC receives from the PCM
The IPC receives that data and also provides a data signal to the HUD. The HUD just displays a digital representation of what the IPC receives from the PCM
Thread Starter
Le Mans Master
Joined: Jun 2016
Posts: 5,431
Likes: 3,991
From: Cincinnati, OH
Soooo the analog fuel gauge on the cluster and the digital reading on the IPC screen both use calculated information from the PCM.
I wanted to make sure that the analog fuel gauge with the needle is not supplying the IPC information or vice versa and that one is not dependent of the other.
My IPC seems to be more consistent and accurate if my analog gauge will be slow to react or read incorrectly for some reason.
I wanted to make sure that the analog fuel gauge with the needle is not supplying the IPC information or vice versa and that one is not dependent of the other.
My IPC seems to be more consistent and accurate if my analog gauge will be slow to react or read incorrectly for some reason.
Last edited by smitty2919; Oct 10, 2018 at 02:41 PM.
Team Owner
Joined: Jul 2012
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From: Central PA. - - My AR15 identifies as a muzzleloader
I believe in the Beer Fairy
The estimated remaining mileage range is based upon the analog gauge gallons signal * average fuel economy. You can verify that by reseting the average MPG and watching the range change.
Team Owner
Joined: Jul 2012
Posts: 34,479
Likes: 532
From: Central PA. - - My AR15 identifies as a muzzleloader
I believe in the Beer Fairy
