Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Test sequence
- Connect VAS5051 tester or VAG1551 scan tool and select control module for engine electronics using "address word" 01. See VAS 5051 VEHICLE DIAGNOSTIC, TESTING AND INFORMATION SYSTEM ORVAG1551 SCAN TOOL (ST), CONNECTING AND SELECTING FUNCTIONS .
Ignition must remain switched on for this.
When indicated on display:
- Press buttons -0- and -8- to select "Read Measuring Value Block" and press -Q- button to confirm input.
When indicated on display:
- Press buttons -0-, -8- and -6- to select "display group number 086" and press -Q- button to confirm input.
When indicated on display:
- Check readiness code in display field 1
- Specification: 0 0 0 0 0 0 0 0
| Display fields | ||||
|---|---|---|---|---|
| 1 | 2 | 3 | 4 | |
| Display group 086: Readiness code | ||||
| Display | 0 0 0 0 0 0 0 0 | X X X X X X X X | X X X X X X X X | X X X X X X X X |
| Indicated | Status-digits completed tests |
individual tests carried out | individual tests carried out | individual tests carried out |
| Functional range | 1 = not completed 0 = completed |
1 = not completed 0 = completed |
1 = not completed 0 = completed |
1 = not completed 0 = completed |
| Specified value | 0 0 0 0 0 0 0 0 | X X X X X X X X | X X X X X X X X | X X X X X X X X |
| Notes | Meaning of readiness code , see Fig 4. | |||
Note for display field 1:
Display field 1 is the most important. This indicates which system was checked via On Board Diagnostic (OBD) since the last time DTC memory was erased or a new control module was implemented. After DTC memory is erased, all testable values are set to 1, after the test is performed, the values are set to 0 .
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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