sourcing.....temp sensor
10-06-2004, 05:09 PM
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Well
If you diagnosed the car right and you need a Engine Coolant Temperature sensor, then yes that would be the part. Dont know if you scanned it and pulled the code for that part or not.
Here is the procedure from my Bentley Manual. The sensor is located on the metal coolant pipe running down the back side of the drivers side exhaust manifold.
Engine Coolant Temperature (ECT) sensor, checking
Note:
For functional testing of Engine Coolant Temperature (ECT) sensor, see also "Read Measuring Value Block" function 08, display group 001, display field 1.
For installation position of ECT sensor page 28-4 .
- Disconnect ECT sensor harness connector.
- Check resistance between terminals 1 and 2 of sensor.
Specified values:
At approx. 20C coolant temperature: approx. 2.5 k
At approx. 80C coolant temperature: approx. 330
If specified values are not obtained:
- Replace ECT sensor.
If specified value is obtained, check wiring from sensor to ECM as follows:
- Connect VAG1598 test box with VAG1598/11 adapter harness to ECM wiring harness Repair Group 01.
(Adapter harness is not connected to ECM.)
--------------------------------------------------------------------------------
28-22
- Check Ground (GND) wire for continuity between ECT sensor connector terminal 2 and GND.
Specified value: maximum 1 ohm ()
- Check signal wire for continuity between ECT sensor connector terminal 1 and test box socket 15.
Specified value: maximum 1 ohm ()
- Check both wires for short to each other.
If specified values are not obtained:
- Repair short and/or break in wiring between ECT sensor and ECM connector -C- and/or GND.
ECT sensor connector terminal
ECM connector C terminal
1
15
2
Ground (GND)
If there is no short or break in wiring, and ECT sensor is OK:
- Replace ECM Repair Group 01.
Here is the procedure from my Bentley Manual. The sensor is located on the metal coolant pipe running down the back side of the drivers side exhaust manifold.
Engine Coolant Temperature (ECT) sensor, checking
Note:
For functional testing of Engine Coolant Temperature (ECT) sensor, see also "Read Measuring Value Block" function 08, display group 001, display field 1.
For installation position of ECT sensor page 28-4 .
- Disconnect ECT sensor harness connector.
- Check resistance between terminals 1 and 2 of sensor.
Specified values:
At approx. 20C coolant temperature: approx. 2.5 k
At approx. 80C coolant temperature: approx. 330
If specified values are not obtained:
- Replace ECT sensor.
If specified value is obtained, check wiring from sensor to ECM as follows:
- Connect VAG1598 test box with VAG1598/11 adapter harness to ECM wiring harness Repair Group 01.
(Adapter harness is not connected to ECM.)
--------------------------------------------------------------------------------
28-22
- Check Ground (GND) wire for continuity between ECT sensor connector terminal 2 and GND.
Specified value: maximum 1 ohm ()
- Check signal wire for continuity between ECT sensor connector terminal 1 and test box socket 15.
Specified value: maximum 1 ohm ()
- Check both wires for short to each other.
If specified values are not obtained:
- Repair short and/or break in wiring between ECT sensor and ECM connector -C- and/or GND.
ECT sensor connector terminal
ECM connector C terminal
1
15
2
Ground (GND)
If there is no short or break in wiring, and ECT sensor is OK:
- Replace ECM Repair Group 01.
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