Passat Sedan 4Motion W8-4.0L (BDP) (2002)
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Transmission Position Switch/Sensor: Testing and Inspection
Selector Lever Position Signal, Checking
Only for vehicles with automatic transmission
The Engine Control Module (ECM) receives the following information from the transmission control module:
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Driving position selected (selector lever in 2/3/4/R/D) or
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no driving position selected (selector lever in P or N)
Special tools and equipment
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VAG 1551 Scan Tool (or VAG 1552 mobile scan tool) with VAG 1551/3 cable
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VAG 1598/31 test box
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VAG 1526 multimeter or VAG 1715 multimeter
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VAG 1594 connector test kit
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Wiring diagram
Test condition
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Selector lever of automatic transmission must be in "P" or "N".
Test sequence
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Connect VAG 1551 scan tool (VAG 1552). Switch ignition on and select Engine Control Module (ECM) using address word 01. Refer to Scan
Tool Testing/Scan Tool Connecting and Initial Checks/Connecting VAG 1551 Scan Tool See: Powertrain Management/Computers and Control
Systems/Testing and Inspection
Indicated on display
Rapid data transfer
HELP
Select function XX
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Press buttons -0- and -8- to select "Read measuring value block" function 08. Press -Q- button to confirm input.
Indicated on display
Read Measuring Value Block
HELP
Input display group number XXX
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Press 0, 5 and 6 for the function "display group number 56", and then press Q to exit from input mode.
Indicated on display (1 - 4 = display fields)
Read Measuring Value Block 56
->
1
2
3
4
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Observe display field 4. Reading should be
Specification: x x x 0 x "Neutral" on display.
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Press brake pedal and select driving position. Reading should be
Specification: x x x 1 x "Drive Pos. ON" on the display.
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Press -> button.
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Press buttons -0- and -6- to select "End Output" function 06. Press -Q- button to confirm input.
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Switch ignition off.
If reading does not change:
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Test databus See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and Inspection
