Temp. Sending unit
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Senior User
Joined: Mar 2008
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From: Vancouver,WA.
Temp. Sending unit
I'm told there's two temperature sending units on the engine one for the gauge and the other to tell the transmission that the engine is up to temperature... can anyone tell me where the second one listed is located? And how can I fool the trany to think the engine is up to temperature?
Fleet Mechanic
Joined: Aug 2011
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There's only one temp sender on theses engines and it's for the gauge, there is also a temp switch for the high idle and timing advance but neither of those go to the TECA.
There is a transmission oil temperature sensor in the solenoid pack inside the transmission, the only inputs the transmission gets from the engine is tach and throttle position.
There is a transmission oil temperature sensor in the solenoid pack inside the transmission, the only inputs the transmission gets from the engine is tach and throttle position.
Tuned
Joined: Feb 2006
Posts: 487
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From: Lampasas,TX
There is a relay for the TECA located in the wiring harness for the right side glow plugs and the wiring to the Cold Idle Solenoid, Cold Idle Timing Advance and FSS. The Cold Idle items are activated/deactivated by a temperature controlled On/Off (ON less than 112*, OFF above 112*) switch located in the forward end of the right head, underneath the radiator hose neck on the thermostat housing.
There are 4 wires to the TECA Relay and it is quite possible that the temperature On/Off switch affects this wiring.
There are 4 wires to the TECA Relay and it is quite possible that the temperature On/Off switch affects this wiring.
Fleet Mechanic
Joined: Aug 2011
Posts: 1,576
Likes: 262
There is a relay for the TECA located in the wiring harness for the right side glow plugs and the wiring to the Cold Idle Solenoid, Cold Idle Timing Advance and FSS. The Cold Idle items are activated/deactivated by a temperature controlled On/Off (ON less than 112*, OFF above 112*) switch located in the forward end of the right head, underneath the radiator hose neck on the thermostat housing.
There are 4 wires to the TECA Relay and it is quite possible that the temperature On/Off switch affects this wiring.
There are 4 wires to the TECA Relay and it is quite possible that the temperature On/Off switch affects this wiring.
Is your od light blinking? Tach working? Those will tell you if the TECA Relay is working.
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Senior User
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From: Vancouver,WA.
The tach works and the OD light doesn't blink... could someone tell me where the wires are and what they/the connector looks like that goes to the transmission? Thanks.
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