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" 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" Testing and Inspection







- Check wiring from 4-pin connector to engine control module for open circuit or short circuit to B+ or Ground (GND).

4-pin connector VAG1598/31 test box
on wiring harness, socket
3 108
4 93

Resistance in wiring: max. 1.5 Ohms

- Repair any open/short circuit as necessary

If no wiring malfunction is detected:
- Replace Engine Coolant Temperature (ECT) Sensor -G62.
- Display readiness code. The readiness code must be generated if the DTC memory was erased.
Refer to "Monitors, Trips and/or Drive Cycle (Readiness Codes)/Readiness Code" Testing and Inspection
Refer to "Monitors, Trips and/or Drive Cycle (Readiness Codes)/Generating Readiness Code" Testing and Inspection