Question about 1995 Audi 90
The engine light on my 1995 Audie A90 (2.8 ltr V6) kept coming on, I took it to a Repair Shop and they diagnosed the problem as a faulty Coolant Temperature Sensor. I bought the new sensor and need to know where the old one is located in order to replace it with the new one. Could someone tell me the location of the Coolant
Temperature Sensor and any tips on how to replace it.
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Feb 10, 2017 | 1999 Oldsmobile Alero
Dec 30, 2015 | 2006 Buick Lucerne
Mar 16, 2014 | Pontiac Firebird Cars & Trucks
Nov 18, 2012 | 1995 Buick Century
Nov 29, 2010 | Dodge Stratus Cars & Trucks
Jun 16, 2017 | 2002 Pontiac Montana
Cooling Fan Switch
Engine Temperature Sensor
Fig. Remove the coolant temperature sensor
The coolant temperature gauge sensor is a temperature-variable resistor, or thermistor. As coolant temperature increases, the resistance of the sensor decreases or decreases, depending on the type of sensor.
A1 and A2 platforms use a different type of circuit that A3 vehicles. On A1 and A2 vehicles, the circuit is a "resistance to ground" type. A3 vehicles use a "variable voltage" type, where a voltage is supplied to the sensor. Because of the circuitry design on A3 vehicles, testing of the coolant temperature gauge is limited.
The engine coolant temperature gauge uses a heat sensitive sending unit to transmit an electrical signal to the gauge. The sending unit is a heat sensitive variable resistor that is located on or near to the cylinder head and threads into an engine coolant passage. The sensors are a Negative Temperature Coefficient (NTC) type. As the temperature increases, the electrical resistance of the sensor decreases. As the coolant temperature changes, so does the resistance of the sensor. The gauge is calibrated within the operating range of the sensor and interprets the resistance value to display the coolant temperature.
Beginning with model year 1994, the engine coolant gauge and the Engine Control Module (ECM) temperature sensors were combined into one sensor with 4 terminals. The basic operation remains the same in that their resistance decreases as the coolant temperature increases, however the actual resistance values of the 2 sensor circuits are different. The electrical connector of the 4-wire terminal sensor ( 1 and 2 ) is keyed to prevent improper connection of the sensor's electrical circuit.
Fig. The electrical connector for the combined temperature sensors is keyed to avoid improperly connecting the sensor's wiring-1997 2.8L V6 connector shown
Oct 17, 2010 | 2004 Volkswagen Jetta
Jul 28, 2010 | 1995 Buick Century
Oct 21, 2008 | 2000 Saab 9-3 Viggen
476 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: