Diagnostics of electronic engine control systems and safety systems (Skoda Felicia)

Contacts C and E for connecting the LED.

Contacts A and D for bridging or connecting a button.

the 5-pin connector is located on the engine compartment bulkhead, next to the electronic control unit. On models manufactured after August 1993, a 16-pin connector of the 2nd generation on-board diagnostics system - OBDII, located in the passenger compartment, may be used. In this case, to read the codes with the tester, it is necessary to use the adapter cable VAG1551/3.

Reading flashing codes

To read the blinking codes, connect the LED between contacts C and E of the connector (+ to E; - to C). Turn on the ignition and short-circuit terminals A and D of the connector for 4 seconds.

Read the 4-digit blinking codes by the LED flashes.

The value of each digit corresponds to the number of flashes lasting 1 sec., except for 0, which corresponds to one flash lasting 2 sec. Thousands of code are transmitted first, units last. Between digits there is a pause of 2.5 sec.

To retrieve the next code, short-circuit the contacts indicated above again, and so on until the code 0000 appears, indicating the end of the output, or 4444 - no fault codes.

Disconnect the wires and turn off the ignition.

To delete codes from the unit's memory, simply disconnect the negative cable from the battery for at least 5 seconds.

To read codes using a scanner, follow the instructions in the device menu.

List of diagnostic codes retrieved with VAG1551 scanner and flashing codes with connected LED

VAG code	Flashing code	Transcript
00282	1232	Idle Speed Control (ISC) Activator
00515	2113	Crankshaft position sensor
00516	2121	Throttle Closed Position Switch
00518	2212	Throttle position sensor
00522	2312	Coolant temperature sensor
00523	2322	Intake air temperature sensor
00524	2142	Knock sensor
00525	2342	Heated lambda probe
00530		Idle Speed Control (ISC) Actuator Position Sensor
00537	2341	Control circuit of heated lambda probe
00558	2343	Heated lambda probe
00561	2413	Incorrect fuel-air mixture
00609		Ignition booster
01087		Basic parameters are not set
01247		EVAP Canister Purge Valve
01249	4411	Injector 1
01250	4412	Injector 2
01251	4413	Injector 3
01252	4414	Injector 4
01253	4421	Idle speed control valve.
01259		Fuel pump relay
65535	1111	Engine control unit

Security System Codes

VAG codes
00532	Supply voltage; the battery is discharged or faulty; short circuit in on-board electrical wiring
00588	Driver Airbag Activation Module; open or short circuit in the circuit; failure of the coil spring; sRS control module failure
00589	Passenger Air Bag Activation Module - Resistance Excessively High or Low; open or short circuit in the circuit; sRS control module failure
00594	Open or short circuit in the driver's or passenger's airbag ignition wiring circuit; failure of the coil spring; airbag module malfunction; sRS control module failure
00595	Data on the accident collision has been entered (side or frontal impact)
01217	Driver's Seat Side Airbag Module; open or short circuit in the circuit; sRS control module failure
01218	Passenger Seat Side Airbag Module; open or short circuit in the circuit; sRS control module failure
01221	Driver's seat side airbag directional overload sensor; open or short circuit in the circuit/incorrect signal; sRS control module failure
01222	Passenger Seat Side Airbag Directional Overload Sensor; open or short circuit in the circuit/incorrect signal; sRS control module failure
01224	Incorrect coding of the SRS control unit
01226	Data on impact from the driver's side was recorded
01227	Impact data recorded on the front passenger side
01280	Front passenger airbag deactivated; sRS control module coding
65535	Control module failure

(Article reprinted from the website: «SKODABOOK»)