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Function Volkswagen Golf Mk4

On Board Diagnostic (OBD) - 1.8L, Awd (A4 Platform) 3 illustrations ~286 words

Function

The readiness code is an 8 digit binary code that indicates the results of an exhaust related On Board Diagnostic (OBD).

Once On Board Diagnostic (OBD) has been successfully completed for a system (e.g. secondary air system), a 0 will be shown in the relevant position.

On Board Diagnostics are performed at regular intervals during normal vehicle operation. After repairing an exhaust related system, the readiness code should be generated to ensure that these systems are working according to specifications. If a malfunction is recognized during the diagnostic check, it is stored in DTC memory.

The readiness code is erased every time DTC memory is erased or when voltage supply is interrupted.

  1. Connect VAG 1551 scan tool (VAG1552). Switch ignition on and select Engine Control Module (ECM) using address word 01 (connecting scan tool and selecting ECM; see «VAG1551 SCAN TOOL (ST), CONNECTING AND SELECTING "ENGINE ELECTRONICS" ADDRESS WORD 01»(ref-213851-S36363195522006010500000) ).

Indicated on display

Scheme 70

Scheme 70
Scheme 70
  1. Press buttons -1- and -5- to select "Readiness code" function 15. Press -Q- button to confirm input.

After all diagnostics have been successfully completed, display reads

Indicated on display

Scheme 71

Scheme 71
Scheme 71
  1. Press --> button.
  2. Press buttons -0- and -6- to select "End data transfer" function 06. Press -Q- button to confirm input.

If indicated on display

Scheme 72

Scheme 72
Scheme 72

One of the diagnostic tests was not completed successfully

  1. Press --> button.
  2. Generate readiness code; see «READINESS CODE, GENERATING»(ref-213851-S35524879782006010500000)

Explanation of 8 -digit readiness code

Readiness code is not generated unless all indicated positions display a 0
12345678Diagnostic function
0Catalytic converter
0Catalytic converter heating (no diagnostic yet, always "0")
0EVAP canister system (tank ventilation system) and leak detection system
0Secondary Air Injection (AIR) system
0A/C system (no diagnostic yet, always "0")
0Oxygen sensors
0Oxygen sensor heating
0EGR recirculation (not available, always "0")

EXPLANATION OF 8 -DIGIT READINESS CODE

  1. Connect VAG 1551 scan tool (VAG1552). Switch ignition on and select Engine Control Module (ECM) using address word 01 (connecting scan tool and selecting ECM; see «VAG1551 SCAN TOOL (ST), CONNECTING AND SELECTING "ENGINE ELECTRONICS" ADDRESS WORD 01»(ref-213851-S36363195522006010500000) ).