Transmission Oil Temperature
Pro Wrench
Joined: May 2016
Posts: 1,617
Likes: 184
From: Lake Tahoe
What were you doing?
I'd start with the basics like checking for leaks, checking the fluid level, how does the fluid look (red, brown...?), check the condition of the tranny cooler (kind of hard to do). If all that passes, drop the pan, check the filter and replace if needed, clean it out, refill with fresh fluid, and then see where you're at.
I'd start with the basics like checking for leaks, checking the fluid level, how does the fluid look (red, brown...?), check the condition of the tranny cooler (kind of hard to do). If all that passes, drop the pan, check the filter and replace if needed, clean it out, refill with fresh fluid, and then see where you're at.
Pro Wrench
Joined: Nov 2015
Posts: 1,935
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From: Coastal Georgia
Any ideas on why? Do I need to bring it in?
As previously said you or somebody else needs to check the fluid level/condition to begin with. If that's good you may want to look at temp sensor or wiring of indication system. Fluid/filter change recommended unless its been regularly serviced.
Transmission fluid from the gearbox is circulated through a cooler attached to the front of the radiator. Quick release
connectors on the transmission fluid lines attach to connections on each end tank of the cooler. A temperature sensor
on the RH end tank provides the instrument pack with an input of transmission fluid temperature. If the temperature
exceeds a preset limit, the instrument pack illuminates the transmission temperature warning lamp. The warning lamp
remains illuminated until the temperature of the fluid returns within limits.
connectors on the transmission fluid lines attach to connections on each end tank of the cooler. A temperature sensor
on the RH end tank provides the instrument pack with an input of transmission fluid temperature. If the temperature
exceeds a preset limit, the instrument pack illuminates the transmission temperature warning lamp. The warning lamp
remains illuminated until the temperature of the fluid returns within limits.
Pro Wrench
Joined: May 2016
Posts: 1,617
Likes: 184
From: Lake Tahoe
I think this is correct, because the transfer box has an oil temp switch, and definitely triggers a light on the dash if too hot. While the owners manual does not say explicitly its the trans oil temp light, there's no other light it could trigger that makes sense. So, check the transfer box oil too
Pro Wrench
Joined: Nov 2015
Posts: 1,935
Likes: 189
From: Coastal Georgia
A temperature sensor on the RH end tank provides the instrument pack with an input of transmission fluid temperature. If the temperature
exceeds a preset limit, the instrument pack illuminates the transmission temperature warning lamp
exceeds a preset limit, the instrument pack illuminates the transmission temperature warning lamp
......
Pro Wrench
Joined: Nov 2015
Posts: 1,935
Likes: 189
From: Coastal Georgia
abran, thanks for the reference.
The Electrical Library suggests some D2s have two different sensors that may illuminate the light. Wiring diagrams confirms both sensors until the x-box sensor was no longer installed on 03/04.
....
The Electrical Library suggests some D2s have two different sensors that may illuminate the light. Wiring diagrams confirms both sensors until the x-box sensor was no longer installed on 03/04.
Transmission oil warning lamp
The transmission oil warning lamp is connected from the instrument pack pin C0230-7 on a
BLG wire to header C0293. BLG wires from header C0293 are connected to the
transmission oil temperature sensors. The sensors are located in the gearbox oil cooler and
the rear of the transfer gearbox.
If an earth path is completed on pin C0230-7 the instrument pack logic circuit monitors this
as an input and provides power from the ignition supply to illuminate the warning lamp.
Fuel warning lamp
The instrument pack internal logic circuits monitors the resistance value of the fuel gauge
circuit. The warning lamp will be illuminated via an internal supply from the ignition circuit if
the value stored in the instrument pack memory is reached.
The transmission oil warning lamp is connected from the instrument pack pin C0230-7 on a
BLG wire to header C0293. BLG wires from header C0293 are connected to the
transmission oil temperature sensors. The sensors are located in the gearbox oil cooler and
the rear of the transfer gearbox.
If an earth path is completed on pin C0230-7 the instrument pack logic circuit monitors this
as an input and provides power from the ignition supply to illuminate the warning lamp.
Fuel warning lamp
The instrument pack internal logic circuits monitors the resistance value of the fuel gauge
circuit. The warning lamp will be illuminated via an internal supply from the ignition circuit if
the value stored in the instrument pack memory is reached.
Last edited by number9; Sep 5, 2017 at 02:37 PM.
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