A4 Quattro Sedan V6-2.8L (ACK) (1997)
Transmission Range Switch: 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 REQUIREMENTS:
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Control module coding OK.
CHECKING:
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Switch ignition ON.
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Using VAG 1551 scan tool, select "Read Measuring Value Block" function 08, display group 004, display field 4.
Indicated on display:
Read measuring value block 4 -->
1 2 3 4
Specified Value: XXX_1X (TR selector lever in P or N).
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Apply brake and select drive mode (1, 2, 3, R or D).
Specified Value: XXX OX.
CAUTION: Do not use the shift inputs (identified) during these selector lever position check.
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Press arrow button.
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Select "End Output" function 06 and press -0- 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).
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:
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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:
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Check multi-function switch, Automatic Transmission.