Charge Air Pressure Sensor 2 / Intake Manifold Temperature Sensor 2, Checking: Notes

Observe all safety precautions: SAFETY PRECAUTIONS

View clean working conditions: CLEAN WORKING CONDITIONS

Use only gold-plated terminals when servicing any component with gold-plated electrical harness connector terminals.

For wiring diagrams, component locations, and connector views, Refer to the appropriate System Wiring Diagram.

Special tools and workshop equipment required

Multimeter
Wiring diagram

NOTE:

The Charge Air Pressure Sensor 2/ Intake Air Temperature Sensor 2 -G447/G430-

are co-located in the same housing. Replacement of either sensor will replace the other also.

Test requirements

The Engine Control Module - J623- fuses OK.
Battery voltage at least 12.5 volts.
All electrical consumers such as, lights and rear window defroster, switched OFF.
On vehicles with automatic transmission, selector lever in position "P" or "N".
A/C switched OFF.
Ground (GND) connections between engine/transmission/chassis OK.
Ignition switched OFF.

Test procedure

-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

-- Remove the engine cover with air filter. Refer to appropriate Service Information.

Fig 1: Engine Cover -1- And -2-

Courtesy of AUDI OF AMERICA, LLC

Test sequence

NOTE:

On the right side, where the compressor is with the charge air cooler. The Charge Air Pressure Sensor 2 / Intake Manifold Temperature Sensor 2 - G447 / G430- and the Charge Air Pressure Sensor / Intake Manifold Temperature Sensor - G31 / G72 - are arranged as mirror images of each other.

-- Disconnect the Charge Air Pressure Sensor 2 / Intake Manifold Temperature Sensor 2 - G447 / G430- electrical harness connector -1-.

Fig 2: Installation Location Charge Air Pressure Sensor -G31- /Intake Manifold Temperature Sensor -G72-

Courtesy of AUDI OF AMERICA, LLC

-- Start engine and let idle.

-- Using a Multimeter, check the Charge Air Pressure Sensor 2 / Intake Manifold Temperature Sensor 2 - G447 / G430- electrical harness connector terminals 2 to 4 for voltage.

Specified value: near 5.0 V

-- Switch the ignition OFF.

-- Continue test according to the following table:

Value	Cause	Test
If the specified value was not obtained:	Open or shorted circuit	CHARGE AIR PRESSURE SENSOR 2 / INTAKE MANIFOLD TEMPERATURE SENSOR 2, CHECKING => Checking wiring
If the specified value was obtained:	Check reference signal / Component	CHARGE AIR PRESSURE SENSOR 2 / INTAKE MANIFOLD TEMPERATURE SENSOR 2, CHECKING => Component Check