sensor AUDI A8 1997 D2 / 1.G AEB Engine Turbocharger Boost Control And Checking
Page 10 of 17
24-131
Barometric Pressure (BARO) sensor,
checking
Note:
The signal from Barometric Pressure (BARO)
sensor -F96- influences:
Boost pressure limit
Mixture composition at engine start-up
Required special tools and test equipment
VAG 1551 or VAG 1552 Scan Tool (ST) with
VAG 1551/3 adapter cable
VAG 1598/22 test box
Multimeter US 1119 (Fluke 83 or equivalent)
VW 1594 connector test kit
Wiring diagrams
Checking
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Page 15 of 17
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Checking wiring
- Disconnect harness connector from Barometric
Pressure (BARO) sensor.
- Switch ignition on.
If voltage is NOT OK: - Connect multimeter US 1119 (Fluke 83 or equivalent) and check
voltage between connector terminals 1 and 3 (Ground) as well as 2
and 3 (Ground), using adapter cables from VW 1594 connector test kit.
Specified value for both: 4.5-5.5 volts
- Switch ignition off.
- Connect VAG 1598/22 test box to ECM harness connector Page 01
-
56
.
- Check wiring for open circuit between ECM/test box and 3-pin harness
connector, according to wiring diagram.
Connector terminal 1 to ECM/test box socket 61
Connector terminal 2 to ECM/test box socket 62
Connector terminal 3 to ECM/test box socket 67
Specified value: max. 1.5
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Page 16 of 17
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- Check wiring for short circuits between terminals
of 3-pin connector, and between connector and
ECM/test box.
Connector terminal 2 to ECM/test box
socket 61
Connector terminal 3 to ECM/test box
socket 61
Connector terminal 3 to ECM/test box
socket 62
Specified value:
If wiring is OK:
- Replace Barometric Pressure (BARO) sensor.
If an implausible value is still displayed after
replacing the barometric pressure sensor:
- Replace Motronic ECM -J220- Page 01
-57
.
- Carry out adaptation of throttle valve control
module to ECM Page 24
-119
.
-
Check readiness code Page 01
-59
. If
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ger boost controls, checkin
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