A8L Quattro Sedan V8-4.2L (AKB) (2002)
Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
Engine Coolant Temperature (ECT) Sensor -G62-, Checking
Engine Coolant Temperature (ECT) Sensor -G62, Checking
-
Connect vehicle diagnostic, testing and information system VAS5051 or VAG1551 scan tool to vehicle and select engine electronics control
module by entering address word "01". When doing this the engine must be at idle. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial
Checks/Connecting VAS5051 or VAG1551" See: Powertrain Management/Computers and Control Systems/Testing and Inspection
Indicated on display
Rapid data transfer
HELP
Select function XX
-
Press buttons -0- and -8- to select function "Read Measuring Value Block" and confirm entry with -Q- button.
Indicated on display
Read Measuring Value Block
Input display group number XXX
-
Press buttons -0-, -0- and -4- to select Display Group 4 and confirm entry with -Q- button.
Indicated on display
Read Measuring Value Block 4
->
1
2
3
4
-
Check readout for coolant temperature sender in display field 3.
Testing wiring
-
Switch ignition off.
-
Disconnect harness connector from sensor.
-
Connect VAG1598/31 test box to wiring harness for engine control module. Do not connect to the engine control module itself. Refer to "Scan
Tool Testing/Scan Tool Connecting and Initial Checks/Connecting VAG1598/31 Test Box" See: Powertrain Management/Computers and Control
Systems/Testing and Inspection