Question about 1992 Toyota Land Cruiser

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Fuel sender unit ohms on a 1991 80series landcrusier

Hi i got a 1991 80series crusier and trying to find out what ohms it is iam putting a autometer gauge in

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I am 90 percent sure that it is 5 ohms to 90 ohoms cheers MAL

Posted on Mar 17, 2009

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Early FJs had a fuel sender with an ohm range of 2.1ohms when full, to 4.5 when half full, to 6.5ohms when empty. Some may range from 33-240 ohms. You should use a VOM (ohm-meter setting) to measure this resistance value at full, empty and half-full positions. Then you will know what gauge to purchase!!! Hope this helps, thanks for using Fixya.com to help solve your issue. Tater Todd

Posted on Jan 28, 2009

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Posted on Jan 02, 2017

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How to fix fuel guage


ZJ
what does it do now? stuck high, low. ,read off a bit. ? or what?
the tests are easy.
covered in the FSM 100% ( in a bad way)
see that here in chapter,called, "instrument panel"
chapter 8E.
page 5
as you can see the gauge is digital (CCD)
and the PCM (engine controller) sends fuel data to the gage via
the CDD data bus.
so the sender , may be telling the PCM wrong information.
I'd start there.
if your read page 5 it tells you the PCM sends, Empty stop data
to the gauge when the sender messes up.? DID YOURS?
does your low fuel warning lamp still work?
if not, that is clue 2 that the sender is BAD. if dead lamp.

that means sender bad, or wires TO it are bad, as in all cases, electrical..
In a real Jeep dealer, they use the DRB tool and read the sender
data directly and in 1 second, ahhh, it reads wrong.
then find the cause.
but us poor, sand crabs, we dont have DRB scanners.
we are not blessed.

but we are not helpless, not yet.
see the last chapter "wiring", see the fuel page. #
8w=20-3 (pdf 69)
see the sender
see the 2 wires,
see the colors. bingo.
what i do is, inplug the PCM (battery neg lug, disconneted)
the measure the resistance of the 2 wires.
DB-LG and BR-YL
PCM C2 -A4 and C1-c26

the sender is JUST a crude Rheostat (a wire wound var. resistor)
0 ohms (near is full) 100 (near is empty)]
if it reads infinity the line is bad. wires, connector all the way to the sender.

old data on older jeeps 86
73 ohms Empty 23 ohms 1/2 tank 10 ohms Full

1998
With float in up position, resistance should be 20 ohms. With float in down position, resistance should be 220 ohm
i dont have spec. on all years.
but it dont matter.
its near zero full
and near 100 to 200 empty
and infinity dead, they all wear out and go open circuit some day.
or the connector rusts 100:1 . over bad sender.
corrosion is no rare thing on cars.

1997 TJ
20 ohms - full
220 ohms - empty.

im scanning the internet finding others data.


96 GC

The same wires can be tested on the pump side to measure the resistance of the sending unit. A low resistance of 20-30 ohms would indicate a full tank and an empty tank should be around 260-300 ohms. If the sending unit resistance tests higher or open circuit the sending unit is bad.

Apr 28, 2014 | 1996 Jeep Grand Cherokee

1 Answer

I have a 1992 Mercury Grand Marquis Ls with a fuel gauge that does not work (gauge may be reversed)??? help please.


The fuel level indicating system is a magnetic type system, which consists of the sending unit located in the fuel tank, an anti-slosh module located on the back of the instrument cluster, and a fuel gauge located in the instrument cluster. The sending unit changes resistance according to the level of fuel in the fuel tank, which varies the current flow through the gauge.The pointer position varies proportionately to the current flow. In this system, the sending unit resistance is low (22 ohms) when the fuel level is low and high( 145 ohms) when the fuel level is high. The pointer of the magnetic gauge remains in position when the ignition is turned to the Off position. On some models, an anti-slosh module is used to dampen out fluctuating fuel signals from the sender. Some vehicles are equipped with a low fuel warning indicator. The anti-slosh module will also actuate the low fuel indicator when the fuel level in the tank reaches 1/16 to 1/8 full.


Do your other gauges/warning indicators work properly with the ignition on? If not, check for power at the fuse panel/fuses.

If they do then partially remove your cluster with connector still installed and check for voltage at cluster connector and gauge. Check continuity of cluster and gauge for ground.

Sometimes the anti-slosh module (if installed) goes bad in the Grand Marquis but not likely.

Sender troubleshooting:
  1. Perform test with resistors as follows:
    1. Disconnect wiring connector at sender unit, then connect resistor between gauge lead and a suitable ground.
    2. Turn ignition switch to On position.
    3. With 145 ohm resistor, the gauge pointer should contact the Full mark.
    4. With 22 ohm resistor, the gauge pointer should contact the Empty mark.
  1. Perform test with fuel sender of known quality as follows:
    1. Turn ignition to Off position.
    2. Disconnect wiring connector from sender and connect it to test sender.
    3. Move float rod away from fuel filter against Full stop position. Wait approximately 30 seconds, then turn ignition switch to On position. The gauge should read on or above the Full mark.
    4. Move float rod toward fuel filter against Empty stop position. Turn ignition switch to Off position. Wait approximately 30 seconds, then turn ignition switch to On position. The gauge should read on or below the Empty mark. If gauge works properly replace sender, which involves dropping fuel tank.

Mar 23, 2013 | 1992 Mercury Grand Marquis

1 Answer

The fuel sender of my Montero Mitsubichi 1988 does not work, i need to find a new one or replacement, were?


1) SUNPRO FUEL LEVEL SENDER Universal; Part number, SUNCP7538, Manf. PN CP7538; $34.95 2) RCI FUEL SENDING UNIT Universal; Part number, R257060B, Manf. PN 7060B; $57.19 3) AUTOMETER FUEL LEVEL SENDING UNIT; Universal: Part Number, A483262, Manf. PN 3262, $41.90 4) DORMAN FUEL SENDING UNIT; Universal, part Number. RB7199, manf. PN 7-199, $36.07
Check out any of these universal fit sending units. They all have about the same ohms reading.

Sep 21, 2011 | 1988 Mitsubishi Montero

1 Answer

Installed new fuel pump in 98 chrysler town and contry lxi gas gauge was working perfect now ga gauge is not working and I keep hearing a dinking sound as if door is open but no door is ...


Hi,
Your sending unit on fuel pump is faulty, wired incorrectly or installed improperly. Dinking is probably low fuel warning from instrument cluster. Check wiring from fuel sender with ohms meter to ground. Make sure you have a good connection at the tank coupler/splice. Test from wire there at tank. Should get increased ohms reading as level is dropped. Shake vehicle/tank to make level vary from fuel sloshing around. If the reading fluctuates, may be bad connection to wiring harness. If not, its faulty. Take pump/sender out and get new one on warranty from parts store......Mike

Jun 20, 2011 | Chrysler Town and Country Cars & Trucks

1 Answer

Hi, My car is Mitsubishi Lancer GLXI 1994. My fuel gauge is not working. The pointer of the gauge is stuck on its first bar. Even you full the tank with gas or turn off the engine. Please send me a step...


sounds like the fuel guage sending unit or fuel level sender
here's some information I found

under the back seat. there are 2 little handles
one under the left back seat and the other under the right back seat
pull both of these and the seat should be free,
remove the seat from the car.
once this is off pry off the metal plate in the middle (sort of looks like an ashtray)
underneath should be the fuel tank sender. You can use an ohmmeter to test it: when full it should read 2-3 ohms, when nearly empty should read 115-120 ohms.

hope this helps

May 24, 2011 | Mitsubishi Lancer Cars & Trucks

1 Answer

Fuel gauge stays at 3/4, after fill up


fuel gauges work using a variable resistor. Typically, when the fuel level is low, the fuel level sender is working at a high resistance. When the tank is full, the sender is working with a low resistance. Anything that increases the resistance in the circuitry will lead to a false low reading. Dirty or corroded wire terminals in the fuel sender circuit would raise the resistance. If you can remove the fuel sender unit from the tank, you can use an ohm meter to check its resistance. When the float is low, you should see a resistance of around 100 ohms. When the float is up (tank full) you should see a low resistance of about 2-5 ohms.

Jan 29, 2011 | Subaru Outback Cars & Trucks

1 Answer

P0463 Fuel Level Sensor Circuit High Input


Hi,

Do you have the fuel level sender in the tank or do you have it out of the tank. It is muck easier out of the tank and better results are given. If the unit is still in the tank, you can ohm the sending unit. The wire colors to the resistor are light blue(pin 6) and gray (pin 1)

The only way to test if the sending unit is functioning is to take your ohm reading/add more fuel and see if the reading changes. There are no specs given from GM.

If the code comes back, the sending unit in the tank is no good. The only reason that the code would reset after filling is that the resistor on the sending unit losses connection.
Unfortunatly it is a common GM problem....

Just put a new sending unit in it and all will be well.

Let me know,if needed further assistance.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Jan 20, 2011 | 2005 Chevrolet Aveo

2 Answers

87 f150 dual tanks fuel gauge doesn't work how can I troubleshoot this with a multimeter; what voltages/ohms values are normal


I have a1987 F-150. The gas gauge for the rear tank always indicate that the tank is full when I know it is not. I try to put gas in but the tank won't let any gas in. Is there some type of sensors inside the tank that won't allow the tank to be filled or is this a guage problem?

Feb 21, 2010 | 1987 Ford F 150

2 Answers

Fuel gauge not working all the time.


This is a normal concern.
The instrument cluster uses 4 different operating modes to calculate the fuel level:
Anti-slosh (default mode)
Key OFF fueling
Key ON fueling
Recovery
After a fuel fill up, the time for the fuel gauge to move from empty (E) to full (F) ranges from 2 seconds to 55 minutes depending on which operating mode the fuel gauge is in.
The default fuel gauge mode is called the anti-slosh mode. To prevent fuel gauge changes from fuel slosh (gauge instability due to changes in fuel sender readings caused by fuel moving around in the tank), the fuel gauge takes approximately 55 minutes to go from empty (E) to full (F).
The key OFF fueling mode (2 seconds to read empty [E] to full [F]) requires 3 conditions be met:
The key must be in the OFF position throughout the entire refueling of the vehicle.
At least 15% of the vehicle's fuel capacity must be added to the fuel tank.
The instrument cluster must receive a valid key ON fuel sender reading within 1 second of the key being put into the RUN position. The key ON sample readings are considered valid if the fuel sender reading is between 15 ohms ± 2 ohms and 160 ohms ± 4 ohms.
If these conditions are not met, the fuel gauge stays in the anti-slosh mode, which results in a slow to read full (F) event.
The key ON fueling mode (approximately 90 seconds to read empty [E] to full [F]) requires 3 conditions be met:
The transmission is in PARK (P).
The key is in the RUN position.
At least 15% of the vehicle's fuel capacity must be added to the fuel tank.
In key ON fueling mode, a 30-second timer activates after the transmission is put into the PARK (P) position (automatic transmissions). When the 30-second time has elapsed and at least 15% of the vehicle's fuel capacity has been added, the fuel gauge response time is 90 seconds to read from empty (E) to full (F). When the transmission is shifted out of PARK (P), the fuel gauge strategy reverts to the anti-slosh mode. The key on refueling mode prevents slow to read full events from happening if the customer refuels the vehicle with the key in the RUN position.
Recovery mode is incorporated into the instrument cluster strategy to recover from a missing fuel level input during a refueling event. Missing fuel level inputs result from intermittent opens in the fuel sender or its circuits. Recovery mode (empty [E] to full [F] approximately 20 minutes) is initiated when the following 2 conditions are met:
The instrument cluster is in the anti-slosh (default) mode.
The actual fuel level in the tank is greater than what is being displayed by the fuel gauge

Feb 18, 2009 | 1983 Mercury Grand Marquis

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