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Sensor is typically located at a hot part of the engine - thermostat housing, heated intake manifold, cylinder head.
Checking a sensor isn't easy because the value changes with the temperature. The sensor is suspended into water of a range of known temperatures and ohm readings taken and compared with the specifications.
The alternative method is to read the live temperature data from the ECU and compare it with readings taken from an accurate contact or infrared thermometer. A rough indication can be made by comparing the cold engine temperature and ambient.
If the ECU is reading coolant Temperature it can be assumed the circuit (wiring) is functioning. Alternatively the circuit function can be checked with an oscilloscope or the wiring can be checked with an ohmmeter after referring to a wiring diagram.
Often the sensor is not expensive and it is more convenient to replace it and hope. Once a replacement is obtained it becomes easier to recognise when looking around the engine...
The F3 E1 error indicates a problem with the oven temperature sensor or a short in the oven temperature circuit. To trouble-shoot this error, unplug the oven. Check the wiring harness for damage and then reconnect it, if it is undamaged. Next check the resistance across the oven temperature sensor. The resistance should be 1080 Ohms at room temperature. Replace the sensor of the resistance is not correct. Otherwise replace the main control board.
Please add a comment with the model of your oven if you want me to look up the parts list or diagram for your appliance.
Check engine light on ? The coolant temp sensor is a input to the PCM - engine computer ! All wires come from an go to the PCM . What type of problem are you having ? Maybe able to save you some aggravation an time chasing gremlins . Coolant gauge not working ?
Engine Coolant Temperature Gage
The instrument panel cluster (IPC) displays the engine coolant temperature as determined by the powertrain control module (PCM) or the engine control module (ECM). The IPC receives a serial data message from the PCM/ECM indicating the engine coolant temperature. The engine coolant temperature gage defaults to 100°F (38°C) if there is a malfunction in the engine coolant temperature sensor or the IPC detects a loss of serial data communication with the PCM/ECM.
But if you insist ,you can find free wiring diagram's here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model an engine ! Under system click on engine ,then under subsystem click on fuel controls . Click the search button then the blue link. The second an third diagrams both show coolant temp sensors . Both go to the PCM .
Well ronnie do you know how to do automotive electrical testing with a volt meter ? How to read an understand a wiring diagram ? Would think not to be a relay problem because other thing's would not work as well ! More then likely a loose ground or something on that order ! Plus you must mean Ignition . 1 relay , because there isn't a eng.1 relay . Ign. 1 relay powers the PCM - engine computer , fuel injectors , the TAC - electronic throttle control module . Do the instrument cluster lights still work when the gauges quit ? Looking at power distribution diagram I see a engine 1 fuse but has nothing to do with the instrument cluster . Supply's B+ voltage to the maf sensor , EVAP system , CAM sensor , IAT sensor , fuel pump relay ! Could be a communication problem on class 2 data bus . All the modules on the vehicle share information on the class 2 bus . The gauges get thier info from the PCM over this data network !
Engine Coolant Temperature Gauge
The IPC displays the engine coolant temperature as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the engine coolant temperature. The engine coolant temperature gauge defaults to 75°C (160°F) or below when:
• The PCM detects a malfunction in the engine coolant temperature sensor circuit.
• The IPC detects a loss of class 2 communication with the PCM.
The IPC displays the fuel level as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the fuel level percent. The fuel gauge defaults to empty if:
• The PCM detects a malfunction in the fuel level sensor circuit.
• The IPC detects a loss of class 2 communications with the PCM.
When the fuel level is less than a pre-determined value, the low fuel indicator illuminates.
Reviewing the fuel system description will further explain how the system functions. Refer to:
The IPC displays the vehicle speed based on the vehicle speed signal from the PCM. The IPC receives the vehicle speed signal via a discreet wire. The IPC uses the vehicle speed signal circuit (4000 pulses/mile) from the PCM in order to calculate the vehicle speed. The speedometer defaults to 0 km/h (0 mph) if a malfunction in the vehicle speed signal circuit (4000 pulses/mile) exists.
The IPC displays the engine speed based on the engine speed signal from the PCM. The IPC receives the engine speed signal from the PCM via a discreet wire. The IPC uses the engine speed signal circuit (2 pulses/engine revolution) from the PCM in order to calculate the engine speed. The tachometer defaults to 0 rpm if a malfunction in the engine speed signal circuit (2 pulses/engine revolution) exists.
Transmission Temperature Gauge
The IPC displays the transmission temperature as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the transmission temperature. The transmission temperature gauge will default to 40°C (100°F) or below if:
• The PCM detects a malfunction in the transmission temperature sensor circuit.
• The IPC detects a loss of class 2 communications with the PCM.
The IPC displays the system voltage as detected at the ignition 1 input of the IPC. When the engine is ON, the gauge should be between 10 and 16 volts.
The only one that has a hard wired sensor is the oil pressure gauge.
Engine Oil Pressure Gauge
The IPC uses the engine oil sensor signal to determine the engine oil pressure. The oil pressure sensor signal circuit is hard-wired to the IPC. The engine oil pressure sensor signal to the IPC is a variable resistance ranging from 0-90 ohms. A sensor resistance of 1 ohms will display as 0 psi (0 kPa) and a resistance of 88 ohms will display as 80 psi (550 kPa). The Check Engine Oil Pressure indicator will be displayed in the message center if the IPC detects a low engine oil pressure.
Does this one drop out also ? quit working
I would suggest that you take an have the IPC checked for DTC'S - diagnostic trouble codes , NOT OBD 2 engine codes , these are different an need a professional type scan tool .
You could check G103 for being loose . G103
On the left rear of the engine block . Also pull the instrument cluster out an check connection at the back of IPC . Check power an ground circuits at the PCM as well . You can fine wiring diagrams here http://www.bbbind.com/free_tsb.html Enter the vehicle info . year , make , model an engine . under system click body an acc. then under subsystem click on instrumentation .Click the search button , then click the blue link . At the top of the diagram it shows B+ power supply , The connectors on the back of IPC , A,B , plus the pin # an color wire . PCM power and ground testing avi How To Use Multimeter Test Car Ground Video 3 Intermittent Electrical Diagnostics with Rich Peterson
I could only find a diagram on a you tube video. Look for Haier Freezer Repair posted by marcibm1. He took a picture of a freezer wiring diagram just like yours only it is a bigger cu. ft. Yours is 3.5 and his is a 7.0. After you study this, if you still have issues, let me know. First thing is to determine what wires go to the indicator lights. Usually the large black wires are power in and out of thermostat to compressor. Take your time and study the diagram. Let me know if I can be of any further help.
It sounds like a temperature sensor problem. On my RF265AABP model there is a control board located under a cover on the back of the refrigerator. There is a wiring diagram on that cover. Remove the cover if you have one, and locate the control board and power supply boards. If you have a voltmeter, check for +5V and +12V (on my model anyway) from the power supply board. If that is OK, then check the voltages on the temperature sensor wires. Mine are at the bottom of the board as shown in the photo. I have 5 temperature sensors, refrigerator (R), freezer (F), refrigerator defrost (R-DEF), freezer defrost (F-DEF), and Pantry (a temperature controlled drawer in the refrigerator). You may need to refer to your specific diagram to get the colors of wires, but it appears that the voltages should be somewhere between about 2 to 4 volts from each sensor to ground. I had a broken ice maker wire that resulted in a high reading, about 4.3 volts on the freezer sensor, so I assume high reading indicate an open sensor, and low reading indicate a shorted sensor. I am not sure where the refrigerator sensor is located. Repairing the broken wire restored the display to normal readings.
On my model the left gray wire is common, and the diagram should indicate color and a letter or so (R, F, R-DEF, F-DEF, Pantry) on my model.
Water Temperature Indicator Sender Unit
The water temperature indicator sender unit is installed on the engine into an engine coolant passage. The water temperature indicator sender unit reacts to the engine coolant temperature. Its resistance decreases as the engine coolant temperature increases.
Water Temperature Indicator Sender Unit
Removal CAUTION: Do not mix Standard (green) Coolant with Extended Life Coolant (orange). If mixing occurs, drain engine cooling system and refill with originally equipped coolant type. If this contamination occurs the service change interval on Extended Life Coolant will be reduced from 6 years/150,000 miles to 3 years/30,000 miles.
Partially drain engine cooling system as described.
Disconnect engine control sensor wiring (12A581) from water temperature indicator sender unit (10884) .
Has the oven run out of control or gotten too hot? The 790 series is made by Frigidaire and those fault codes are F0 to F8. F2 indicates the temperature sensor is reading too hot. Now with the double oven models, some manufactures add an extra digit to the fault codes to indicate which oven created the fault.
Your most likely fix is to replace the temperature sensor. The most probable locations for the wiring diagram is taped inside the bottom drawer, on the back or under side of the oven, or behind one of the panels on the back of the oven. This might tell you the room temperature resistance for the temperature sensor so you can test it with an ohmmeter and be sure that it is faulty. Try Appliance Parts Pros for replacement sensors.