Throttle Valve Drive and Drive Angle Sensor, Checking

Checking Throttle Valve Drive And Throttle Valve Drive Angle Sensor

Test conditions
Coolant temperature must be at least 85 degree C, see display group 04, display zone 3.

Test sequence
- Connect VAG 1551 Scan Tool ((VAG 1552). Start engine and select "Address word" 01 of engine control module. When doing this engine must be running at idle speed. (Connecting scan tool and selecting engine control module [1][2][3]Connecting VAG Scan Tool 1551/1552).

Indicated on display

Rapid data transfer HELP
Select function XX

- Press keys 0 and 8 for function "Read Measuring Value Block" and confirm entry with Q key.

Indicated on display:

Read Measuring Value Block HELP
Input display group number XXX

- Press keys 0, 6 and 0 for "Display group number 60" and confirm entry with Q key.

Indicated on display: (1 to 4 = Display zones)

Read Measuring Value Block 60 ->
1 2 3 4

- Check the operating mode in display zone 3:
Idle speed
- Check throttle valve angle in at idling stop in display zone 1
Specification: 0 to 6 angle degree
- Check throttle valve positioner at idling stop in display zone 2.
Specification: 60 to 90%

If the specifications are not attained:
- Press -> key.
- Press keys 0 and 6 for "End data transfer" function and confirm input with Q key.
- Switch ignition off.







- Pull 8 pin connector off throttle valve control module.
- Measure resistance of throttle valve positioner between following contacts:
Contact 1 + 2
Specification: 3 to 200 Ohm

If the specification is not obtained:
- Replace throttle valve control module -J338-.

If the specification is obtained:
- Check voltage supply of throttle valve control module and wiring to control module.

Checking voltage supply and wiring to control module







- Pull 8 pin connector off throttle valve control module.
- Connect multimeter to measure voltage at connector contacts 4+7.
- Switch ignition on.
Specification: min. 4.5 V
- Connect multimeter to measure voltage at connector contacts 3+7.
Specification: at least 9 V
- Switch ignition off.

If the specifications are not attained:







- Connect test box VAG 1598/22 to control module wiring harness.







- Check wiring for open circuit between test box and connector using wiring diagram:
Contact 1 + socket 66
Contact 2 + socket 59
Contact 3 + socket 69
Contact 4 + socket 62
Contact 5 + socket 75
Contact 7 + socket 67
Contact 8 + socket 74
Wire resistance: max. 1.5 Ohm
- Check additional wires for short to one another.
Specification: Infinite Ohm

If no wiring malfunction is detected:
- Check engine control module voltage supply. Voltage Supply For Engine Control Module (ECM), Checking