Lexus SC430 2nd (Z40) (2002–2010) — Key Programming Reference
- Difficulty
- medium
Key fobs & transponder keys (2 variants)
| Key | Years | FCC ID | P/N | Chip | Freq | Battery | Blade |
|---|---|---|---|---|---|---|---|
| 315 MHz · HYQ12BBK | 2002–2010 NA all trims | HYQ12BBK | 89070-50660 | Texas ID 4D 68 | 315 MHz | CR1616 | TOY48 / LXP90 |
| 305 MHz · 89070-50761 | 2002–2010 — Europe & Middle East export SC430 (supplier fitment reads SC430 2001–2009); AU/NZ and JDM coverage inferred, not source-confirmed | n/a | 89070-50761 | Texas ID 4D 68 | 305 MHz | CR1616 | TOY48 |
Programming procedures
What the job needs
- Add a key: 1 existing working key required.
- All keys lost: no existing working key needed.
- PIN / security code: Toyota cloud seed-code.
- Online / server access: not required (offline programming).
- On-board (no tool) sequence: not available — Lexus SC430 (Z40) 4D68 smart/remote key requires professional OBD tool — no self-programming procedure for this transponder family.
- On site: engine off · Maintain 12V+ · Clear IMMO DTCs.
- Bring: Photo ID + vehicle registration. VIN cross-check before start.
Tool coverage
Documented for this case on: Autel IM608 Pro II · Autel IM508S · Autel KM100 · Xhorse Key Tool Plus · Xhorse Key Tool Max Pro · Lonsdor K518 Pro / K519 · OBDSTAR X300 DP Plus · AutoProPad G2/G3 · Advanced Diagnostics Smart Pro · Launch X431 IMMO Elite / IMMO Plus. Step-by-step menu paths for each tool are in the app.
Notes & cautions
- This chassis Lexus SC430 (Z40) uses Texas 4D68 pre-G transponder (2002-2010). 4D68 is an older fixed-code Texas chip — most modern aftermarket programmers cover it via OBD2 with the "Toyota/Lexus → Older Texas (4D68/4D67)" path. Autel KM100 and Lonsdor K518 USA both confirm 4D68 support. No XP400 PRO bench, no APB112 simulator needed for OBD enrolment.
- Smart proximity key: ensure existing key fob battery is functional before starting.
- Verify chip before booking: H-chip vs G-chip vs 4A AES generations share a fob shell but use different cryptosystems — confirm transponder ID from a working key with Lonsdor K518 reader before quoting.
- Tool kit context: most aftermarket flows use Autel IMKPA accessory or Lonsdor LKE Smart Key Emulator for cloud seed-code; Autel APB112 simulator and Autel G-Box bench EEPROM are NOT required for OBD-only add-key on this Toyota family. XP400 PRO only needed for damaged ECU EEPROM dump fallback.
- All existing keys erased. Bring ALL replacement keys before starting — minimum 2.
- No manual AKL for Lexus SC430 (Z40) 4D68 smart key — professional tool mandatory.
- AKL for Toyota/Lexus 4D68 typically needs dealer-issued PIN or seed-code cloud calc — confirm OBD AKL path before quoting.
- Keep all existing/lost key fobs at least 10 metres from vehicle during AKL.
- AKL accessory needs: Autel IMKPA Toyota module for cloud seed-code calc, Lonsdor LKE Smart Key Emulator for K518 simulated-key AKL path. APB112 simulator and Autel G-Box bench EEPROM are NOT mandatory for standard AKL on this Toyota family — only XP400 PRO is needed if the ECU EEPROM is corrupted (rare).
Lockout
Lishi TOY50
27 verified sources · Last verified: 2026-08-09
Open full case in KeyAssist →Step-by-step tool menu paths, verified source links and video guides for this case are in the KeyAssist app — free to start, works offline.