A4 Sedan V6-2.8L (AFC) (1996)
Transmission Position Switch/Sensor: Testing and Inspection
NOTE: The Engine Control Module (ECM) uses this signal to recognize the transmission range selector lever position. When a driving mode is
selected, idle speed should drop by approx. 50 RPM to reduce creep.
Checking requirement
-
Control module coding OK, Refer to "Code Control Module, under On Board Diagnostic (OBD)-Multiport Fuel Injection (MFI)". See:
Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/Code Control Module (Function 07)
-
Switch ignition ON.
-
Using VAG 1551 scan tool, select "Read Measuring Value Block" function 08, display group 004, display field 4, refer to "Read Measuring Value
Block (Function 08)". See: Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/Read Measuring Value Block (Function
08)
Indicated on display
Read measuring value block4
->
1
2
3
4
Specified value: XXX_1X (TR selector lever in P or N)
-
Apply brake and select drive mode (1, 2, 3, R or D).
Specified value: XXX_0X
CAUTION!
Do not use the shift inputs (identified by an X) during the selector lever position check.
-
Press -> button.
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Select "End Output" function 06 and press -Q- button to confirm input.
If a display did NOT change, even though coding is OK:
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Connect VAG 1598/19 test box to ECM harness connector.
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Connect VAG 1527B voltage tester between test box sockets 11B (signal) and 10B (constant B+/terminal 30).
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Voltage tester must light up (with TR selector lever in P or N), then go out with drive mode (1, 2, 3, R or D) selected
If voltage tester lights up and goes out when drive mode is selected, even though the range indicator in the "Read measuring value block" is OK:
-
Replace ECM.
If voltage tester lights up constantly or not at all:
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Check wiring for short to ground, short to B+ or open circuit between ECM terminal 11B and multi-function switch, using wiring diagram.
If wiring is OK:
-
Check multi-function switch.