engine coolant AUDI A4 1998 B5 / 1.G APB Engine Motronic Syst

01-21

DTC
Description of malfunction
Corrective action
SAE
VAG


P0112 16496 Intake Air Temp. Circ.
Low Input
2) - Check Intake Air Temperature (IAT) sensor Page 28
-17
P0113 16497 Intake Air Temp.
High Input
2)
P0116 16500 Engine Coolant Temp. Circ.
Range/Performance - Check Engine Coolant Temperature (ECT) sensor Page 28
-25
P0117 16501 Engine Coolant Temp. Circ.
Low Input
2)
P0118 16502 Engine Coolant Temp. Circ.
High Input 2)
2) With this malfunction the exhaust Malfunction Indicator Light (MIL) is only switched on by the ECM, if the malfunction is
recognized after the engine has been restarted. Significance of MIL Page 01
-3 .
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01-44

DTC
Description of malfunction
Corrective action
SAE
VAG


P1287 17695 Turbocharger bypass valve
Open
Repair Manual, 2.7 Liter V6 5V BiTurbo Engine Mechanical, Engine
Code(s): APB, Repair Group 21, checking Recirculating valve for turbocharger
- Check recirculating valve for turbocharger -N249
P1288 17696 Turbocharger bypass valve
Short to B+

P1289 17697 Turbocharger bypass valve
Short to Ground

P1296 17704 Cooling System
Malfunction
2)
Repair Manual, 2.7 Liter V6 5V BiTurbo Engine Mechanical, Engine
Code(s): APB, Repair Group 19, Cooling, Components for cooling system, engine side
- Check Engine Coolant Temperature (ECT) sensor Page 28
-25
P1297 17705 Charger/throtle-valve
connection, Pressure loss - Check hoses between turbocharger and throttle valve:
Repair Manual, 2.7 Liter V6 5V BiTurbo Engine Mechanical, Engine
Code(s): APB, Repair Group 21; Turbocharger

2) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized
again after another engine start. Significance of MIL Page 01
-3 .
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01-46

DTC
Description of malfunction
Corrective action
SAE
VAG


P1335 17743 Engine Torque Monitoring 2
Control Limit Exceeded
1) 3)
- Check hoses Page 24
-170

- Check Intake Air Temperature (IAT) sensor Page 28
-17
- Check Mass Air Flow (MAF) sensor Page 24
-59
- Check Engine Coolant Temperature (ECT) sensor Page 28
-25
P1336 17744 Engine Torque Monitoring
Adaptation at limit - Check hoses Page 24
-170

- Check Intake Air Temperature (IAT) sensor Page 28
-17
- Check Mass Air Flow (MAF) sensor Page 24
-59
- Check Engine Coolant Temperature (ECT) sensor Page 28
-25
1) With this malfunction the EPC (Electronic Power Control) Malfunction Indicator Light (MIL) in the instrument cluster is
switched on by the ECM. Significance of EPC malfunction indicator light Page 24
-142
.
3) With this malfunction the exhaust Malfunction Indicator Light (MIL) is switched on by the ECM, immidiately after the
malfunction has been recognized. Significance of MIL Page 01
-3 .
Pa
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01-69

DTC
Description of malfunction
Corrective action
SAE
VAG


P1620 18028 Engine coolant temperature signal
Open/short to B+
P1621 18029 Engine coolant temperature signal
Short to ground - Check coolant temperature signal Page 24
-181
P1622 18030 Engine coolant temperature signal
Range/Performance Note for malfunctions P1620, P1621 and P1622:
The Engine Control Module (ECM) receives the "Coolant temperature signal" from the instrument cluster. When the ECM
receives this signal the boost pressure will be decreased.
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01-89

Test requirements for operations with engine
running

No DTCs stored in DTC memory
Coolant temperature at least 85 C

Electrical consumers switched off (radiator
fan must not run during test)
A/C switched off

- Connect vehicle diagnostic, testing and
information system VAS 5051 or VAG1551 scan
tool and select engine electronics control
module by entering address word "01" Page 01
-9 . When doing this the engine must be
idling.

- Check and erase DTC memory Page 01
-15
.
There should be no malfunctions stored in the
DTC memory. (If necessary repair malfunctions,
erase DTC memory and switch off engine. Start
engine again, road test the vehicle and check
DTC memory again to check).

- Continue to run engine at idle.
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01-91

Display group 000 (indicated values decimal)

Engine running at idle (Coolant Temperature not less than 80 C)
1 2
3 4
5 6
7 8
9 10
Display fields
Specification Represents





Adaptation value of mixture formation, bank 2 108 - 148 -4 to 4%





Adaptation value of mixture formation, bank 1
108 - 148
-4 to 4%




Control value of mixture formation bank 2
(If out of specification perform road test) 122 - 136 -4 to 4%




Control value of mixture formation bank 2
(If out of specification perform road test)
122 - 136
-4 to 4%



Adaptation value torque loss at idle 124 - 140 -3 to 5%



Idle torque
126 - 135
-1.5 to 1.5%


Throttle valve angle 1 - 7 0.4 to 2.75%


Engine speed (idle speed)
77 - 83
770 - 830 RPM

Engine load (without consumers) 21 - 34 15 - 26%
Engine Coolant Temperature (requirement for basic setting)
177 - 203
85 - 105 C
1) Up-to-date specifications:
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01-92

- Allow engine to idle for a few minutes: Coolant
temperature at least 80 C.
Notes:

When the PRINT button is pressed the current
display will be printed out.
Press C button before selecting further display
groups.

- If readouts in all display fields match
specifications, press button.
Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -6- to select function "End Output".
Rapid data transfer
HELP
06 - End Output

Indicated on display
- Confirm with -Q- button.
Rapid data transfer
HELP
Select function XX

Indicated on display
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01-97

Read Measuring Value Block


Test requirements

Coolant temperature at least 80 C

Electrical consumers switched off (radiator
fan must not run during the check)
A/C switched off

- Connect vehicle diagnostic, testing and
information system VAS 5051 or VAG1551 scan
tool and select engine electronics control
module by entering address word "01" Page 01
-9 . When doing this the engine must be
idling.
Rapid data transfer
HELP
Select function XX

Indicated on display:
- Press buttons -0- and -8- to select function "Read Measuring Value
Block" and confirm entry with -Q- button.
Read Measuring Value Block Input displa
y group number XXX

Indicated on display
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01-110
If specified value "ADP. OK" is obtained:

- Press -C- button.

Work step 4: Diagnosis of EVAP canister
purge regulator valve

- Start engine (vehicles with manual transmission
depress clutch pedal)

Note:
If necessary, ECM must be re-selected with the
"address word" 01 following engine start, and the
function "initiate basic setting" selected with "04."

Test requirements

Engine at idle
Coolant temperature > 85 C (display group
4, display field 3)
Rapid data transfer
HELP
Select function XX

Indicated on display
- Press button -0-, -7- and -0- to select "display group number 070" and
confirm input with -Q- button.
System in Basic Setting 70

When indicated on display
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01-112
If the specified value "EVAP OK" is reached:

- Press -C- button

Work step 5: Diagnosis of tank leak test

Note:
This diagnostic is locked the first 230 seconds
after engine is started.

Test requirements

Engine at idle
Coolant temperature greater 85 C (Display
group 4, display field 3)

Intake air temperature less 95 C (Display
group 4, display field 4)
System in Basic System
Q
Input displa
y group number XXX

When indicated on display
- Press buttons -0-, -7- and -1- to select display group number "071" and
press -Q- button to confirm input.
Pa
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