1998 AUDI A8 display

24-156
If the wiring is OK:

- Check multi-function Transmission Range (TR)
program switch -F125-.

Repair Manual, 5 Spd. Automatic
Transmission 01V, Repair Group 01


- Check readiness code Page 01
-59
. If
Diagnostic Trouble Code (DTC) memory has
been erased, or ECM was disconnected,
generate new readiness code Page 01
-62
.
Explanation of 4-digit display
Explanation when display field is = 0
x
x
x
x
(Display group 56)
0 A/C compressor off (0 = A/C compressor off / 1 = A/C compressor on)
0 Selector lever in P or N (0 = selector lever in P or N /1 = selector lever in 2/3/4/R/D)
0 Always "0"
0 Always "0"
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Test procedure

- 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) Page 01
-7 .
Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -8- to select "Read Measuring Value Block"
function 08, and press -Q- button to confirm input.
Read Measurin
g Value Block
HELP
Input displa
y group number XXX

Indicated on display
- Press buttons 1, 2 and 2- to input display group number 122, and press
-Q- button to confirm input.
Read Measuring Value Block 122 1 2 3 4

Indicated on display (1-4 = display fields)
WARNING!
A second technician is required to operate the VAG 1551 scan tool
during the road test. - Road test.
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- Compare display with specified value in display
field 4:

Display fields

1 2 3 4
Display group 122: Engine torque reduction during shifting
Display xxxx RPM xxx Nm xxx Nm TCS active
Motor enga
Indicates Engine speed
(in 40 RPM
steps) Required engine
torque
(Specified torque) Actual engine
torque
(Actual torque) Timing angle retard active or not active
Range 0-6800 RPM -100 to 410 Nm -100 to 310 Nm ---
Specified
value --- --- --- When shifting, "Motor enga" must be
displayed briefly

--- --- --- If not as specified Page 24
-160

If display is OK (as specified):

-
Press button to advance program
sequence.
- Press buttons -0- and -6- to select "End Output"
function 06, and press -Q- button to confirm
input.
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Continuation

Note:
The wiring to the Transmission Control Module is
monitored by On Board Diagnostic and stores
the Diagnostic Trouble Code 00545 if there is a
malfunction.
If displayed value is NOT OK (not as specified),
or if DTC 00545 is stored in DTC memory:

- Connect VAG 1598/22 test box to ECM harness
connector Page 01
-56
.

Electrical Wiring Diagrams, Troubleshooting & Component Locations - Check wiring for short circuit or open circuit between ECM harness
connector terminal 23 and to Transmission Control Module (TCM),
according to wiring diagram
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