A4 Quattro Sedan L4-1.8L Turbo (AEB) (1998)
Transmission Range Switch: Testing and Inspection
Transmission Range (TR) Signal, Checking
Transmission Range (TR) Signal, Checking
NOTE:
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Through the multi-function Transmission Range (TR) program switch -F125- at the transmission, the Engine Control Module (ECM) recognizes
whether a drive range is selected (selector lever in 2/3/4/R/D) or not (selector lever in P or N)
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The multi-function Transmission Range (TR) program switch -F125- at the transmission switches to Ground through terminal 22 of the ECM when
the shift lever is in N or P.
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When a drive range is selected, the switch opens and terminal 22 now has power
Required special tools and test equipment
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VAG 1551 or VAG 1552 Scan Tool (ST) with VAG 1551/3 adapter cable
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VAG 1598/22 test box
Test procedure
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Connect VAG 1551 or VAG 1552 scan tool and press buttons -0- and -1- to insert "Engine Electronics" address word 01 (with engine running at
idle). Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/Connecting VAG 1551/1552 Scan Tool" under "Powertrain
Management/Computers and Control Systems/Testing and Inspection" 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, and press -Q- button to confirm input.
Indicated on display
Read Measuring Value Block
HELP
Input display group number XXX
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Press buttons -0-, -5- and -6- to input display group number 56, and press - Q- button to confirm input.
Indicated on display (1-4 = display fields)
Read Measuring Value Block 56
->
1 2 3 4
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Compare display with specified value in display field 4: