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Hi guys I need a little help here.
i’ve been looking on here about the coolant level buzzer issue and this is another write up with pictures of what’s my problem. Because no one has to touch on my specific topic. (Auto to manual)
Please Note. that my car was a automatic and I did converted it to a manual with a single turbo and the year is a 1993 Mazda RX7 FD.
Note-
1—When I turn the key to the on position II the buzzer and low coolant light come on after a few seconds and won’t go off..
2—coolant is full- haven’t started the car.
3—(Automatic transmission) coolant housing has 4 sensors... 2 in the front of the housing and 2 in the rear of the housing.
( please looks at the pictures I have lables the sensors 1,2,3, and 4 to see which one I’m referring to )
( SENSORS IN FRONT OF COOLANT HOUSING )
sensor lable (#1) — Is the coolant level sensor and has a single wire and the colors are a solid black with red stripes.
Sensor lable (#2)— I have no idea what this sensor is.
But has 1 single wire on it with the same colors of the coolant level sensor (#1) solid black with red stripes.
(SENSORS AT THE REAR OF THE COOLANT HOUSING)
Sensors Lable (#3)— This sensor has 2 wires
A solid green with a long white stripe and silver stripes going across.
And the other wire is a solid brown wire with a black long stripe and silver stripes going across
(when I ground any of these wires the fan come on)
And the wires go’s into passenger side of the car
Sensor lable (#4)— Is a single wire sensor That I wired to a solid black wire with a red long red stripe.
(When I also ground this wire I hear the fan come on)
And the wire go’s into the passenger side of the car
In the first picture sensor number 1 is the coolant level sensor, that is what does the coolant buzzer. Sensor 2 is a temp switch for the automatic transmission, that isn't needed at all on a manual trans car.
The coolant level sensor connects with a 1-wire black connector behind the power steering pump, that brings the signal from the ECU harness to the main harness and on the way to the instrument cluster.
You should be able to disconnect that wire behind the power steering pump and use a meter to make sure you're plugging the sensor into the correct wire on the harness. It looks like some of those wires have been hacked on or modified so you want to be sure you're plugging in to the correct one.
There's nothing different with this sensor for automatic and manual, you just have that extra sensor that is for the auto trans. This thread should cover the level sensor itself -
04-15-18, 11:37 AM
