On-Board Diagnostic
On-Board Diagnostic system, reading/erasing without VAG 1551 Scan Tool

Requirement
Adaptor cable 357 971 514E (from glove box) or use Jumper wire.
Activating
Switch ON ignition.
Remove shift lever cover.
Bridge the black and the white Data Link connectors using jumper wire for approx. 5 seconds.
MIL light(Brake/ABS warning light) must begin blinking.
Disconnect jumper wire.
Repeat this procedure until blink code 4444 or 0000 "End of Output" appears.
Check DTC code troubleshooting table.

Erasing
Switch OFF ignition.
Bridge Data Link connector.
Switch ON ignition and after approx. 5 seconds remove adaptor wire from Data Link Connectors.
After blink code 4444 appears, switch OFF ignition.

However! where is my Malfunction indicator lamp(MIL)?
VAG-1551          Blink Code Possible cause Corrective step
00000 4444
No malfunction recognized!
- -
Fuel and Ignition OBD VR6
00281           1231
Vehicle speed sensor (G 68)

Impossible signal

No signal

 Multi-function indicator gets no signal from speedometer (G 21) Wiring diagrams, repair or replace as necessary
To check the road speed signal; drive the vehicle at full load and raise the engine speed to 4500 RPM minimum.
00513           2111
Engine speed sensor (G 28)


No signal

Impossible signal

 (G 28) malfunctioning


Open circuit in wiring

Sensor wheel for engine speed sensor malfunctioning or loose

 Check (G 28) and related wiring, using wiring diagram, repair or replace as necessary

Check sensor wheel for secure fit
00515           2113
Camshaft position sensor (G 40)


Open circuit/short to positive

Short to ground

 Camshaft position sensor (G 40) rotor twisted

Open circuit or short to positive in wiring (G 40)

Short to ground in wiring (G 40)		 Check distributor

Check control times

Check wiring to (G 40)
00518           2212
Throttle position sensor (G 69)

Short to positive

Short to ground		 Open circuit or short to positive in wiring (G 69)

Short to ground in (G 69) wiring		 Check wiring together with (G 69)

Check wiring together with (G 69) for short to ground using wiring diagram, repair or replace as necessary
00522           2312
Engine coolant temperature sender (G 62)*

Short to ground

Open circuit/short to positive in wiring		 (G 62) malfunctioning



Short to ground in wiring

(G 62) malfunctioning, or corrosion on connector

Open circuit/short to positive in wiring

 Check wiring and (G 62) for short
00524           2142
Knock sensor (G 61)

Open circuit/short to positive 		(G 61) malfunctioning

Open circuit/short circuit in sensor wiring

Knocking not recognized by Motronic engine control module (J 220)

 Replace (G 61)

Check wires to (G 61)

Replace (J 220)
00525           2342
Oxygen sensor probe (G 39)
No signal
Short to positive
Short to ground
 (G 39) malfunctioning

Open circuit
Open circuit or short to positive
Short to ground in wiring or in (G 39)
Fuel level too low

 Replace (G 39)

Check wiring to (G 39)

Fill fuel tank then erase DTC Memory
00527           2412
Intake air temperature sensor (G 42)

Short to ground

Open circuit/short to

(G 42) malfunctioning


Short to ground in wiring or (G 42)

(G 72) malfunctioning		 Replace (G 42)

Check wiring together with (G 42) for a short to ground

00532           2234
Supply voltage*
Too high
Too low

 Battery voltage above 16.0 V
Battery voltage below 10.0 V		 Check generator (alternator) output
00533            2231
Idle regulation adaption limit exceeded


Adaption limit not met		 Idle Air Control (IAC) valve (N 71) stuck or dirty


Air leak between Mass Air Flow sensor (G 70) and engine		 Check IAC valve

Check intake air system

For vehicles with EGR, check EGR valve
00535           2141

First knock regulation

Impossible signal

 Knock regulation in ECM (J 220) defective Replace (J 220)
The engine control module DOES NOT check voltage until the engine has been running for 3 minutes
00537           2341
Oxygen sensor regulation

 O2S (Oxygen Sensor) probe heater defective Check voltage supply to probe heater
Regulating limit exceeded Exhaust system leaking between cylinder head and catalyst

Misfiring


Intake air system leaking (outside air)

Injector(s) (N 30, N 31, N 32, N 33, N 83, N 84) malfunctioning

Fuel pressure too low

Hot wire for MAF sensor (G 70) not burning off cleanly

EVAP canister purge regulator valve (N 80) stuck (always open)		 Check O2S heater for continuity
Check exhaust system

Check ignition system components


Check intake air system

Check N 30, N 31, N 32, N 33, N 83, N 84)

Check fuel pressure regulator

Check (G 70)

Perform Output DTM (Output checks)
Regulating limit not reached Fuel pressure too high

Injector(s) (N 30, N 31, N 32, N 33, N 83, N 84) malfunctioning, leaking		 Check fuel pressure regulator

Check (N 30, N 31, N 32, N 33, N 83, N 84)

Signal to ground Short to ground in O2S (Oxygen Sensor) probe (G 39) or in wiring Check wiring together with (G 39) for short to ground
00540           2144
Knock sensor II (G 66)

No signal		 (G 66) malfunctioning

Open circuit/short circuit in sensor wiring

Knocking not recognized by Motronic engine control module (J 220)

 Replace (G 66)

Check wires to (G 66)

Replace (J 220)
00545           2314
Engine/transmission electrical connection

Short to ground

 Wire has short to ground Determine and eliminate short using wiring diagram, repair or replace as necessary
00553           2324
Mass air flow sensor (G 70)*

Signal too high


Signal too low		 (G 70) malfunctioning

Short to positive in wiring


(G 70) malfunctioning or short to ground in wiring

Air leak between (G 70) and engine (outside air)

 Check wiring to (G 70)

Replace (G 70), page 01-109, Test step 25

Check wiring to (G 70), if wiring OK, replace (G 70)

Eliminate leaks
00561           2413
Mixture adaption

Adaption limit exceeded


or


Adaption limit not reached		 Fuel pressure NOT OK

Misfiring


Intake air system leaking (outside air)


Injector(s) (N 30, N 31, N 32, N 33, N 83, N 84) defective, leaking


Hot wire for MAF sensor (G 70) not burning off cleanly

O2S (Oxygen Sensor) regulation faulty

Exhaust system leaking between cylinder head and catalyst

EVAP canister purge regulator valve (N80) sticks in open position

 Check fuel pressure regulator

Check ignition system components

Check intake air system

Check (N 30, N 31, N 32, N 33, N 83, N 84)


Check (G 70)

Check wire to O2S (Oxygen Sensor) probe
Check exhaust system


Perform Output DTM (Output checks)
00585           2411
EGR temperature sensor (G 98)*

Short to ground

 Temperature sensor in EGR valve (G 98) malfunctioning or wire is shorted to ground Check wires to (G 98)
00586
Controlling EGR system

Impossible signal

 EGR valve sticks or is malfunctioning

 Check EGR valve
01025
Triggering for On Board Diagnostic (OBD) lamp malfunctioning

Short in positive

Open circuit/short to

Wiring has short to positive





Malfunction indicator lamp malfunctioning		 Check wiring using wiring diagram
01242           4332
Output stages in engine control module

Mechanical malfunction		 Loose terminal to one of the Output DTM components or to the Motronic engine control module (J 220) Perform Output DTM (Output check) diagnosis

Check for loose terminal or connection in wiring to one of the Output DTM components or replace (J 220) if necessary
01247           4343
EVAP canister purge regulator valve (N 80)

Open circuit/short to positive

Open circuit/short to negative		 (N 80) malfunction or short to positive in wiring



(N 80) malfunction or short to negative in wiring

 Check wiring together with (N 80)
01249           4411
Injector for No. 1 cyl. (N 30)

Open circuit/short to positive

Open circuit/short to negative

 (N 30) malfunction or short to positive positive


(N 30) malfunction or short to negative negative		 Check wiring together with (N 30)
01250           4412
Injector for No. 2 cyl. (N 31)

 No. 1 cylinder (DTC Code 01249) Check wiring and (N 31)
01251           4413
Injector for No. 3 cyl. (N 32)

 No. 1 cylinder (DTC Code 01249) Check wiring and (N 32)
01252           4414
Injector for No. 4 cyl. (N 33)

 No. 1 cylinder (DTC Code 01249) Check wiring and (N 33)
01253           4421
Injector for No. 5 cyl. (N 83)

 No. 1 cylinder (DTC Code 01249) Check wiring and (N 83)
01254           4422
Injector for No. 6 cyl. (N 84)

 No. 1 cylinder (DTC Code 01249) Check wiring and (N 84)
01257           4431
Idle air control valve (N 71)


Signal to positive

Signal to ground


Mechanical malfunction

 (N 71) malfunction or short to positive



(N 71) malfunction or short to negative in wiring

(N 71) malfunction		 Check wires together with (N 71)

Perform Output DTM (Output check) diagnosis
01259          4433
Fuel pump relay (J 17)
Short to positive

 (J 17) malfunction or wire has short to positive
 Check wiring and (J 17)
01265           4312
EGR vacuum regulator solenoid valve (N 18)

Open circuit/short to ground

Short to positive

 EGR valve (N 18) malfunction or open circuit or wiring is shorted to ground

(N 18) malfunction or wiring is shorted positive		 Check wiring to (N 18)

Check wiring and (N 18)
65535           1111
ECM malfunctioning

 Components in the Motronic engine control module (J 220) are malfunctioning

 Replace (J 220)

ABS OBD
                    4444
No malfunction recognized		 If "No malfunction recognized" appears after performing repairs, OBD is ended.

If despite "No malfunction recognized" appearing in the display, the ABS system does not operate properly, continue without OBD and work through the electrical test complete

                      1111
Control Module (J104) faulty		 Electrical malfunctions caused by external sources or poor ground (GND) connections.

 Test wiring, wiring connections and GND connections to control module
00257         1112

Left Front ABS Inlet Valve -N101
 Faulty wiring, wiring connection or valve coil.

Malfunction at contact 3 of ABS Control Module (J104).

 Test wiring, wiring connections and valve coil:
00259         1114

Right Front ABS Inlet Valve -N99

 Faulty wiring, wiring connection or valve

 Test wiring, wiring connections and valve coil
00261         1122

Rear ABS Inlet Valve -N103

 Faulty wiring, wiring connection or valve coil.
 Test wiring, wiring connections and valve coil
00265         1132

Left Front ABS Outlet Valve -N102

 Faulty wiring, wiring connection or valve coil.

 Test wiring, wiring connections and valve coil
00267         1134

Right Front ABS Outlet Valve -N100

 Faulty wiring, wiring connection or valve coil. Test wiring, wiring connections and valve coil
00269         1142

Rear ABS Outlet Valve -N104

 Faulty wiring, wiring connection or valve coil. Test wiring, wiring connections and valve coil
00278         1122

Right Front ABS Inlet Valve -N99

 Faulty wiring, wiring connection or valve coil.
 Test wiring, wiring connections of main valve
00279         1223

Differential Lock Valve 1 -N125

 Faulty wiring, wiring connection or valve coil.

 Test wiring, wiring connections and valve coil
00280         1224

Differential Lock Valve 2 -N126

 Faulty wiring, wiring connection or valve coil

 Test wiring, wiring connections and valve coil
00283         1233

Front left speed sensor -G47








Mechanical malfunction


Signal not to tolerance		 Open circuit, short circuit or loose contact in:

Speed sensor cable.

Plug connection.

Speed sensor.

Excessive or insufficient gap between speed sensor and pulse wheel (signal not OK.) speed sensor and pulse wheel (signal not OK).

Pulse wheel and speed sensor dirty or damaged.

 Test wiring, plug connections, speed sensor, GND cables to control module and also capacitor for correct GND connection





Check installation of speed sensor and pulse wheel; clean if necessary.
00285         1241

Right Front ABS Wheel Speed Sensor -G45







Mechanical malfunction



Signal not to tolerance

 Open circuit, short circuit or loose contact in:

Speed sensor wiring.

Wiring connection.

Speed sensor.

Excessive or insufficient gap between speed sensor and pulse wheel (signal not OK).

Pulse wheel and speed sensor dirty or damaged.		 Test wiring, wiring connections and speed sensor, GND to control module as well as capacitor for correct GND connection



Test wiring, wiring connections and speed sensor, GND to control module as well as capacitor for correct GND connection
00287         1243

Right Rear ABS Wheel Speed Sensor -G44







Mechanical malfunction

Signal not to tolerance

 Open circuit, short circuit or loose contact in:

Speed sensor wiring.

Wiring connection.

Speed sensor.

Excessive or insufficient gap between speed sensor and pulse wheel (signal not OK).

Pulse wheel and speed sensor dirty or damaged.		 Test wiring, wiring connections and speed sensor, GND to control module as well as capacitor for correct GND connection:




Check installation of speed sensor and pulse wheel; clean if necessary.
00290         1311

Left Rear ABS Wheel Speed Sensor -G46







Mechanical malfunction




Signal not to toleranc

 Open circuit, short circuit or loose contact in:

Speed sensor wiring

Wiring connection.

Speed sensor.

Excessive or insufficient gap between speed sensor and pulse wheel (signal not OK).

Pulse wheel and speed sensor dirty or damaged.		 Test wiring, wiring connections and speed sensor, GND to control module as well as capacitor for correct GND connection:





Check installation of speed sensor and pulse wheel; clean if necessary.
00291         1312

ABS Pressure Warning Switch II - F116
ABS Brake Fluid Level Warning Switch -F117

Short circuit to positive

 Wiring between contact 8 and contact 51 of ABS Control Module (J104) and components F116 and F117 has connection to Battery Positive (B+). Visual inspection of harness routing between contact 8 and contact 51

Disconnect multi-pin connector from control module, connect to test box V.A.G. 1598 and measure voltage with digital multimeter Fluke 83 (US 1119) between contacts: 8 and 1: max 0.1 V 51 and 1: max 0.1 V
00532         2234

Supply voltage

 Faulty wiring, wiring connections, fuse S54 or ABS Relay (J102).
 Test wiring, wiring connetions and GND cables to control module: Test supply voltage:
00547         2133

ABS Pressure Control Switch -F137

 Wiring between contact 13 and contact 26 of ABS Control Module (J104) with component F137 has connection to Battery Positive (B+).

 Visual inspection of harness routing between contact 13 and contact 26 Wiring diagram.

- Disconnect multi-pin connector from control module, connect to test box V.A.G. 1598 and measure voltage with digital multimeter Fluke 83 (US 1119) between contacts:
13 and 1: max 0.1 V
26 and 1: max 0.1 V
Further test step 32






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