Barometric Pressure Sensor: Testing and Inspection
Barometric pressure (BARO) sensor -F96-, checking
Special tools, testers, measuring instruments and auxiliary items required
- VAG 1598/22 Test Box
- Fluke 83 Multimeter
- VW 1594 Adaptor kit
- Wiring diagram
Test conditions
- Vehicle is stationary, engine running at idle.
Test sequence
- Connect VAG 1551 Scan Tool (or VAG 1552 mobile scan tool). Then start engine and select Engine Control Module (ECM) via "address word" 01.
(connecting Scan Tool and selecting Engine Control Module (ECM), [1][2][3]Reading and Clearing Diagnostic Trouble Codes)
Indicated on display:
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -8- to select function "Read measuring value block" and press -Q- button to confirm input.
Indicated on display:
Read measuring value block HELP
Enter display group number XXX
- Press buttons -1-,-1- and -3- to select "Display group number 113" and then press the -Q- button to confirm input.
Indicated on display:
Read measuring value block 113 ->
1 2 3 4
(1 through 4 = display fields)
- Check indicated value of Barometric pressure (BARO) sensor in display field 4.
- Specified value: actual air pressure (approx. 1000 mbar)
NOTE: Compare indicated value in display field 4 with the VAG 1397/A turbocharger test tool if necessary.
If the specified value is not obtained:
- Disconnect the 3-pin connector at sensor, Refer to "Fuel Delivery and Air Induction", Locations; Component location overview
- Switch ignition on.
- Connect multimeter to the following terminals of the connector for a voltage measurement:
Terminal 1 + 3
Terminal 2 + 3
Specified value: 4.5 to 5.5V
If the specified values are not obtained:
- Connect the VAG 1598/22 test box to wiring harness of control module.
- Check wires between test box and 3- pin connector for open circuit according to wiring diagram.
Terminal 1 + socket 61
Terminal 2 + socket 62
Terminal 3 + socket 67
Wire resistance: max. 1.5 Ohms
- Also check wires for short circuit to each other.
Specified value: Infinity Ohms
- Also check wire for short circuit to B + and Ground (GND)
Specified value: Infinity Ohms
If no malfunctions are found in the wires:
- Replace Barometric pressure (BARO) sensor -F96-