audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Throttle Drive Angle Sensor 1 (For Electronic Power Control (EPC)) G187|Page 864 > < Throttle Drive Angle Sensor 1 (For Electronic Power Control (EPC)) G187|Page 862
Page 1
background image

Throttle Position Sensor: Testing and Inspection

Throttle Position Sensor/Accelerator Pedal Position Sensor 2, Checking

Special tools, testers and auxiliary items required

-

Multimeter.

-

Wiring diagram

Test requirement

-

The Motronic Engine Control Module (ECM) J220 fuses OK.

-

Battery voltage at least 12.5 volts.

-

All electrical consumers such as, lights and rear window defroster, switched off.

-

Vehicles with automatic transmission, shift selector lever into position "P" or "N".

-

A/C switched off.

-

Ground (GND) connections between engine/transmission/chassis OK.

NOTE:  Use only gold-plated terminals when servicing the electrical harness connector terminals in Throttle Position (TP) Sensor G79 / Accelerator
Pedal Position Sensor 2 G185.

Test procedure

-

Perform a preliminary check to verify the customers complaint.  See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Initial Inspection and Diagnostic Overview/General Diagnosis

Start diagnosis

-

Remove the drivers side storage compartment.

-

Disconnect the Throttle Position (TP) Sensor G79 / Accelerator Pedal Position Sensor 2 G185 6-pin electrical harness connector.

Checking voltage supply and wiring

-

Switch the ignition on.

-

Using a Multimeter, check the following wiring connections for voltage.

Throttle Position (TP) Sensor G79/

Specified  value

Accelerator Pedal Position Sensor 2
G185 electrical harness connector
terminal

1 to Ground (GND)

about 5 V

1 to 5

about 5 V

2 to Ground (GND)

about 5 V

2 to 3

about 5 V

-

Switch the ignition off.

If the specification is not obtained:

If the manufacturers test box is being used. Perform the following step.

-

Install the test box.

If the manufacturers test box is not being used. Perform the following step.

-

Remove the Motronic Engine Control Module (ECM) J220.

Throttle Drive Angle Sensor 1 (For Electronic Power Control (EPC)) G187|Page 864 > < Throttle Drive Angle Sensor 1 (For Electronic Power Control (EPC)) G187|Page 862