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Home >> Audi >> 1997 >> A4 Sedan (8D2) V6-2.8L (ACK) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Component Tests and General Diagnostics >> MIL Wire From Transmission Control Module, Checking
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MIL Wire From Transmission Control Module, Checking




NOTE:
- If a malfunction is recognized by the Engine Control Module (ECM) or the Transmission Control Module (TCM), it is indicated by the Malfunction Indicator Lamp (MIL) in the instrument cluster.
- If the TCM recognizes a malfunction, the MIL is switched on via the ECM.
- The MIL wiring is monitored by the ECM.


Checking requirement
- Control module coding OK, Refer to "Code Control Module". Code Control Module (Function 07)
- Switch ignition ON.
- Using VAG 1551 scan tool, select "Read Measuring Value Block" function 08, display group 027, display field 1, refer to "Read Measuring Value Block (Function 08)" under "/Powertrain Management/Fuel Delivery and Air Induction/Testing & Inspection". Read Measuring Value Block (Function 08)

Indicated on display; note display field 1


Read measuring value block 27 ->
1 2 3 4


Specified value: 0

- Start engine and let idle.
Specified value: 1

- Press -> button.
- Select "End Output" function 06.
- Press -Q- button to confirm input.

If the specified value is not obtained, even though coding is OK:
- Connect VAG 1598/19 test box to ECM harness connector.
- Check wiring for open or short circuit between ECM and TCM, using wiring diagram.
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