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Oil sressure sender resistance for 1998 XJ
- Thread starter jonnycat
- Start date
- Location
- Minneapolis, MN
Sorry, no idea. Why are we asking?
Oil pressure senders are cheap and easy, I just thread in another if the gauge shows funny numbers. If nothing makes sense, install a mechanical gauge see what is actually happening.
Oil pressure senders are cheap and easy, I just thread in another if the gauge shows funny numbers. If nothing makes sense, install a mechanical gauge see what is actually happening.
lawsoncl
NAXJA Forum User
- Location
- North Idaho
From https://www.naxja.org/forum/archive/index.php/t-930297.html for a 1996.
Oil Pressure Gauge Calibration
Pointer Position .................Resistance
0 psi Graduation(±2°) ..........1 ohm
40 psi Graduation(±3.5°) ......46 ohms
80 psi Graduation(±3°) .........87 ohms
Oil Pressure Gauge Calibration
Pointer Position .................Resistance
0 psi Graduation(±2°) ..........1 ohm
40 psi Graduation(±3.5°) ......46 ohms
80 psi Graduation(±3°) .........87 ohms
Unclewolverine
NAXJA Forum User
- Location
- Kansas
Just get a mechanical, the factory ones are junk. I have my factory plumbed in tandem with mechanical and they never agree. Factory is 99% of the time lower. My volts also read lower than actual. One day I'll get the thermostat cover with the bung for an extra temp gauge, can't wait to see how accurate that gauge is too.
Edited for correction: They don't show the same thing. Please read the rest of the thread. Below applies to '99.
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Don't have a '98 manual but the '97 and '99 show the same thing.[/b]
No resistance values but the sending unit has 3 wires.
Orange - 5v supply
Green/Yellow - Sensor Signal (goes to Pin B23 on C2 connector to PCM)
Brown/Yellow - Sensor Ground (goes to Pin A4 on C1 connector on PCM)
Check for voltage at the supply. Check for continuity at the others. Check your grounds.
"The instrument cluster microprocessor calculates engine oil pressure gauge needle position based on the oil pressure data message on the CCD bus. The Powertrain Control Module (PCM) broadcasts the data message over the CCD bus."
As others have sugested, verify with a mechanical gauge.
----------------------------------------------
Don't have a '98 manual but the '97 and '99 show the same thing.[/b]
No resistance values but the sending unit has 3 wires.
Orange - 5v supply
Green/Yellow - Sensor Signal (goes to Pin B23 on C2 connector to PCM)
Brown/Yellow - Sensor Ground (goes to Pin A4 on C1 connector on PCM)
Check for voltage at the supply. Check for continuity at the others. Check your grounds.
"The instrument cluster microprocessor calculates engine oil pressure gauge needle position based on the oil pressure data message on the CCD bus. The Powertrain Control Module (PCM) broadcasts the data message over the CCD bus."
As others have sugested, verify with a mechanical gauge.
Last edited:
lawsoncl
NAXJA Forum User
- Location
- North Idaho
Ah! I didn't realize the sensor changed. It's output voltage you need to measure then, not resistance. I haven't seen a chart for those values anywhere.
lawsoncl
NAXJA Forum User
- Location
- North Idaho
Digging deeper into the FSMs. I don't have a 1998 manual, but the 1997 shows a 2-wire resistance sensor and the 1999 shows 3 wire (powered, so signal is voltage).
RockAuto only shows it crossing to a 1998 XJ, so maybe its an oddball year?
Unclewolverine
NAXJA Forum User
- Location
- Kansas
Not applicable in your situation because mines a 95 rhd, but in the blank spot to the left of the instrument cluster.
Yeah, 99 is definitely a three pin as I looked at one at the parts store when I got mine.