Identify the source’s box and protocol group
S4Wiki lists M-, K- and L-box software and the 8D0907551 part-number group among the files using SLOW-0x11 for ME7Logger KWP2000 connection. Its M- and L-box identifiers are 8D0907551M and 8D0907551L. Preserve the complete software identity with the .ecu configuration.
| Setting or mode | Behaviour reported for this source group |
|---|---|
| SLOW-0x11 | KWP2000 connection with no engine-speed check in the documented entry |
| Address 0x01 in this group | KW1281 diagnostic entry, distinct from the KWP2000 entry used above |
| SLOW-0x00 / DoubleDelay sequence | Two-stage slow-init workaround involving address 0x01; the documented sequence requires the engine stopped during connection |
| Fast init | The source describes a fast route to KWP2000; use the applicable logger/cable documentation |
The current source explains older K-box “connect before starting” reports through the double-slow-init sequence and recommends the documented 0x11 entry for that software. It also publishes K-/Q-box binary-patch examples; those remain exact-image research and are not implied by selecting ME7.1 or by this configuration summary.
Keep the S4 diagnostic meanings separate
| S4 code discussed | Function described by the source | Evidence to inspect |
|---|---|---|
| P1555 / 17963 | Actual boost above request by the applicable threshold and duration | Request, actual pressure, deviation, control output and fault state |
| P1556 / 17964 | Underboost-control diagnosis under its enabling conditions | Attainable pressure, N75/actuator behaviour, regulator limit and leaks |
| P1557 / 17965 | Manifold/upstream pressure-ratio or plausibility diagnosis in the documented S4 strategy | MAF/manifold model, upstream pressure and charge-air leaks; the text label alone is insufficient |
The source distinguishes a predicted-pressure throttle intervention that can happen without a DTC from the sustained overboost fault, and describes a separate fallback path for the other boost diagnoses. Its 1.8T examples use different code assignments; see the ME7.5 diagnostic reference before transferring these meanings.
V6 output configuration
ESKONF describes power-output-stage configuration and diagnosis. The source’s V6 ME7.1 layout spans 13 bytes; its source-reported M-box sequence is:
00 FC E3 FF 3C 00 F3 FF AA FA 55 55 55For reading the following rows, each byte is shown as four bit-pair positions from most significant to least significant. This is a source layout to match against DEKON and the actual file, not a replacement block to copy.
| Byte | Bit-pair positions reported by S4Wiki |
|---|---|
| 0 | EV6 | EV3 | EV4 | EV1 |
| 1 | XX | EAGR | LULK | TEV |
| 2 | XX | EKP | AKF | MIL |
| 3 | XX | XX | XX | SLP |
| 4 | EV5 | SLV | XX | NWS |
| 5 | HSH2 | ULT | EV2 | LDR |
| 6 | XX | BKV | HSH | EFLA |
| 7 | XX | XX | XX | XX |
| 8–9 | Ignition output pairs as documented in the source |
| 10–12 | Source M-box example uses 0x55 for absent output-stage ICs |
In the source legend, 00 enables the applicable installed-output diagnosis, 11 skips it, 10 has special treatment, and the complete-byte pattern 0x55 indicates an absent output-stage IC. A skipped diagnostic does not by itself prove the physical component is absent.
The M-box and L-box examples have different reported values in particular positions; transmission and CAN-receive configuration also has application-specific dependencies. Preserve the original configuration and identify each controlled output before describing a change.
Source context and adaptation
Adapted, paraphrased and reorganised from S4Wiki contributors’ Tuning, revision 5324, under Creative Commons Attribution 4.0 International. This wiki adds scope labels, cross-links and interpretation notes. The cited software observations have not been independently reproduced by this wiki.
Source sections: Connection modes, K-box logging, Boost control DTCs, V6 ESKONF layout.
Sources
Curated reference notes. Applicability follows the cited sources; hardware testing by this wiki is not implied.
- S4Wiki: Tuning — source for expanded ME7 references. S4Wiki contributors; Creative Commons Attribution 4.0 International. Paraphrased, expanded and reorganised by Tuning Wiki. Source revision oldid 5324; accessed 2026-11-10.