display AUDI A6 1996 C5 / 2.G AHA Engine Throttle Valve Control Module Checking Workshop Manual
[x] Cancel search | Manufacturer: AUDI, Model Year: 1996, Model line: A6, Model: AUDI A6 1996 C5 / 2.GPages: 36, PDF Size: 0.12 MB
Page 7 of 36
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 display group number XXX
Indicated on display
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Page 8 of 36
24-133
- Press buttons -0-, -0- and -5- to input display
group number 5 (005), and press -Q- button to
confirm input. Read Measuring Value Block 5 1 2 3 4
Indicated on display (1-4 = display fields)
- Check Closed Throttle Position (CTP) switch (display field 4):
Display fields
1 2 3 4
Display group 5: Engine electronics
Display xxx RPM xx.xx ms xxx km/h Idle
Part throt
Full throt
Decel
Enrich
Indicates Engine speed
(in 40 RPM steps) Engine load Vehicle speed Operational condition
Range 0 - 6800 RPM 0.00 - 12.75 ms --- ---
Specified value 620 - 740 RPM
(all-wheel drive) 1.00 - 2.50 ms 0 km/h Throttle closed: "Idle"
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Page 9 of 36
740 - 860 RPM
(front-wheel drive)
Throttle slightly open: "Part throt"
--- --- --- If display is NOT OK page 24
-134
, Continuation
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Page 13 of 36
24-137
Checking
- Connect VAG1551 or VAG1552 scan tool and
press buttons -0- and -1- to insert "Engine
Electronics" address word 01 (with engine
running at idle) page 01
-8 .
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 -0-, -5- and -5- to input display group number 55 (055),
and press -Q- button to confirm input.
Read Measuring Value Block 55 1 2 3 4
Indicated on display (1-4 = display fields)
- Compare display with specified values for idle air control (display fields
1-4):
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Page 14 of 36
24-138
Display fields
1 2 3 4
Display group 55: Idle control
Display xxx RPM x.xx g/s x.xx g/s xxxx
Indicates Engine speed RPM
(in steps of 10 RPM) Regulating value-idle mass air
flow (idle air control) Learning value-idle
mass air flow Operating
conditions
Range 0 - 2550 RPM -2.78 to +2.85 g/s -1.67 to +3.34 g/s ---
Specified
value 620 - 740 RPM
(all-wheel drive)
or
740 - 860 RPM
(front-wheel drive) -1.39 to +1.39 g/s -1.39 to +1.39 g/s 0000
(all-wheel drive)
and/or
0100
(front-wheel
drive)
If engine speed is NOT OK page
24
-141
, Continuation
If display is NOT OK page 24
-139
, Evaluation of
display group 55
Explanation
page 24
-140
If displayed values are OK:
-
Press button.
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Page 16 of 36
24-139
Evaluation of display group 55 Display group:
55
Display fields:
2 3
Possible malfunction cause
Corrective action
above 1.39 g/s
Increased load because of switched-
on consumers - Switch off electrical consumers
Throttle valve mechanism sticking
Air passage in area of throttle valve
contaminated - Visually check, repair if necessary
below -1.39 g/s
Intake air leak (false air) behind
throttle valve - Check intake air system for leaks (false air) page 24
-126
- Check exhaust system Repair Manual, 2.8 Liter V6 5V
General, Engine, Repair Group 26
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Page 17 of 36
24-140
Explanation of 4-digit display
Explanation when display field is = 0
x
x
x
x
Display group 55
0 A/C compressor off (0 = A/C compressor off; 1 = A/C compressor on)
0 Shift lever in P or N (0 = Shift lever in P or N; 1 = Shift lever in 2/3/4/R/D)
0 Idle air control boost (0 = no idle air control boost, for all-wheel drive vehicles; 1 = idle air control boost, for
front-wheel drive vehicles)
0 always "0"
Note:
The increased idle speed (raised rpm) on vehicles with front-wheel drive is attained if there is power supplied (B+, 15er) to
terminal 10 of the engine control module.
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Page 22 of 36
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 display group number XXX
Indicated on display
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Page 23 of 36
24-144
- Press buttons -0-, -0- and -3- to input display
group number 3 (003), and press -Q- button to
confirm input. Read Measuring Value Block 3 1 2 3 4
Indicated on display (1-4 = display fields)
- Compare display with specified values for throttle angle, (display field
3):
Display fields
1 2 3 4
Display group 3: Load measurement
Display xxx RPM xx.x g/s
xxx
xx.x BTDC
Indicates Engine speed
(in 40 RPM
steps) Mass air
flow Throttle angle Ignition timing
Range 0 - 6800 RPM ---
0 - 90
0.0 - 50.0
BTDC
Specified
value 0 RPM ---
0 - 5
0.0
--- --- If not as specified page 24
-146
, Evaluation of
display group 3
---
-
Open throttle valve slowly while monitoring degree ( ) value in display field 3. Value must increase uniformly over the entire range.
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Page 25 of 36
24-145
- Press buttons -0- and -6- to select "End Output"
function 06, and press -Q- button to confirm
input.
- Switch ignition off.
Note:
The values displayed in display field 3 depend on
the calibration of the Throttle Position (TP)
sensor and do not correspond with the actual
throttle valve opening in degrees. The maximum
displayed value is 90.0 . If the throttle angle value does not increase
uniformly:
- Replace throttle valve control module -J338-.
- Carry out adaptation of throttle valve control
module to ECM page 24
-150
.
- Check readiness code page 01
-70
. If
Diagnostic Trouble Code (DTC) memory has
been erased, or ECM was disconnected,
generate new readiness code page 01
-73
.
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