1995 AUDI A4 check engine

01-144

Output on GST and/or
on VAG 1551 scan tool
Possible malfunction cause

Malfunction repair
P1613 / 18021
MIL Call-up Circ.Open
Short to B+ Wiring connection between Engine
Control Module (ECM) -J192- and
Transmission Control Module (TCM) -J217-
faulty

- Check MIL wiring from Transmission
Control Module (TCM) -J217- page 24
-
105


Malfunction cause found: Yes
No

- Erase DTC memory, test drive, after test
drive check DTC memory again
MIL Status:
MIL lights up
immediately
Transmission Control Module (TCM) -
J217- faulty

Repair Manual, 5 Spd.
Automatic
Transmission 01V On Board Diagnostic (OBD), Repair Group 01
- Replace ABS control module -J104-

Malfunction cause found: Yes
No

- Erase DTC memory, take test drive, after
test drive check DTC memory again
For troubleshooting
Display group 027
Engine Control Module (ECM) -J192-
faulty

- Replace and code ECM -J192- page 01
-265
erase DTC memory and take
test drive check DTC memory
Notes:

This malfunction can only occur in connection with an automatic transmission.
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01-146

Notes:

The output diagnostic test mode can only be
carried out with the ignition switched on and the
engine NOT running.
The output diagnostic test mode is interrupted if
the engine is started or a rotary pulse is
recognized.
During the output diagnostic test mode, the
individual outputs are triggered until the
program is continued by pressing the button.

The outputs are checked by listening for the
sound of the component being actuated, of by
feeling for mechanical evidence of actuation
(clicking, vibration, etc.).
Without letting the engine run briefly, switch the
ignition off for approx. 20 sec before repeating
the output diagnostic test mode.

- Connect VAG 1551 scan tool and initiate until
"Select function" is indicated on the display
page 01
-7 .
Rapid data transfer
HELP
Select function XX

Indicated on display
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01-149

Only on vehicles with secondary air injection
(AIR) system Output diagnostic test mode Secondar
y Air In
jection
(AIR
) solenoid valve -N112

Indicated on display
This valve is triggered (clicks) until you move on to the next output by
pressing the button. - If the valve is not triggered (does not click), check -N112-.
Output diagnostic test mode Secondar
y Air In
jection
(AIR
) pump rela
y -J299

Indicated on display
The secondary air injection pump relay -J299- triggers the secondary air
pump motor and it runs until the output DTM is ended by pushing the
button (maximum 10 sec.). - If secondary air injection pump motor does not run, check engine and -
J299-.
-
Press button.
Rapid data transfer
HELP
Select function XX

Indicated on display
Note:
Before selecting "Output Diagnostic Test Mode" function 03 again, switch
ignition off for approx. 20 sec.
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01-153

- Check and erase DTC memory page 01
-
13
.

There must be no malfunctions stored (if
necessary repair malfunction, erase DTC
memory and test drive, switch engine off and
start again, test drive and, as a check, check
DTC memory again).

Note:
The readiness code is erased each time the DTC
memory is erased (either with function 05 or with
Mode 4).

- After checking and erasing DTC memory, let
engine continue to run at idle.
Rapid data transfer
HELP
Select function XX

Indicated on display
Note:
When the HELP button is pressed, an overview of possible functions is
printed out.
- Press buttons -0- and -4- to select "Basic Setting" function 04.
Rapid data transfer
Q
04 - Basic Setting

Indicated on display
- Press Q-button to confirm input.
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01-166
Test table display group 001 Display
field Display on
VAG 1551 scan
tool Malfunction cause
Malfunction repair
1 Greater than
110
or
Less than 85
Engine Coolant Temperature (ECT)
sensor -G62-
Wiring connection to Engine Control
Module (ECM) -J192-
Coolant thermostat faulty
Repair Manual, 2.8 Liter V6 2V Engine
Mechanical, Engine Code(s): AFC, Repair Group 19
- Check DTC memory page 01
-13
- Check -G62- page 28
-25
- Check engine coolant thermostat
2 Less than 1.450
V
Large intake air leak between intake
manifold and Mass Air Flow (MAF)
sensor Repair cause
Greater than
1.580 V Electrical consumers on, steering wheel
at end stop, driving mode selected
(automatic transmission)
Tolerance for new engines: - Switch consumers off
- Center steering wheel
- Put selector lever in P or N position
display group 004, display field 4
Max. 1.660 V
When engine speed increases, the display
value increases to 2.500 V, falls to 0.000 V
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and starts to go up again
4 Greater than
14.000 V
or
Less than
12.000 V
Generator faulty
Overvoltage because of starting aid
Poor ground connection to ECM -J192-
Discharged battery
Current draw with ignition off - Check voltage
- Check battery charging status
- Check voltage supply of Engine Control
Module (ECM) Repair Group 28
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01-169

Display
field Display on VAG
1551 scan tool Malfunction cause
Malfunction repair
3 Outside tolerance
range
Closed Throttle Position (CTP)
switch activated or faulty CTP switch or throttle position
sensor -G69- incorrectly adjusted Electrical consumers onSteering wheel at end stopDriving mode selected (automatic
transmission) Moisture in connector for -G69-Ground point on intake manifold - Check DTC memory page 01
-13
- Check and adjust -G69- page 24
-77
- Switch electrical consumers off
- Center steering wheel
- Selector lever in P or N display group 004,
display field 4 - Visual inspection
- Check ground connection according to wiring
diagram
4 0 or 1
Closed Throttle Position (CTP)
switch -F60- faulty Throttle position sensor -G69-
incorrectly adjusted Throttle sticks Floor mat presses against
accelerator pedal Moisture in connector of -G69-Accelerator pedal cable adjustment Display group 011, display field 4
Repair Manual, 2.8 Liter V6 2V Engine
Mechanical, Engine Code(s): AFC, Repair Group 20
- Check DTC memory page 01
-13
- Check and adjust -F60- page 24
-73
- Visual inspection
- Adjust accelerator pedal cable:
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01-170
Display group 003 Display shows
Display/specified value
Designation
Basic setting 3
1 2 3 4 650 - 750 RPM 1 = Momentary idle speed
15.0 - 35.0% 2 = Engine load idle1)
0% and/or greater than 95% 3 = Throttle angle - at idle: 0%; at wide open throttle: > 95%
... km/h 4 = Momentary vehicle speed 1) Evaluate engine load tolerance range only at idle during "Basic Setting" function 04.
Note on display field 1:
Idle speed on vehicles without A/C and rear windshield heater switched on: 750-850 RPM.
Notes on display field 3:
For the testing at wide open throttle, stop engine, and switch ignition on.
Since in vehicles with manual transmission and automatic transmission different throttle bodies are installed, the start of
opening of the throttle body can be measured with ignition on and thus incorrect installation can be checked
Manual transmission: 45-53%
Automatic transmission: 27-35%
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