Mercury Grand Marquis 3rd–4th generation (1998–2011) — Key Programming Reference
- Difficulty
- easy
- Lishi / lockout
- FO38
Key fobs & transponder keys (3 variants)
| Key | Years | FCC ID | P/N | Chip | Freq | Battery | Blade |
|---|---|---|---|---|---|---|---|
| 315 MHz · CWTWB1U313 | 1998–2005 NA + GCC export | CWTWB1U313 | 3W7Z-15K601-AA | none | 315 MHz | CR2032 | n/a |
| 315 MHz · CWTWB1U331 | 2006–2011 NA + GCC export | CWTWB1U331 | 2S4T-15K601-AA | none | 315 MHz | CR2032 | n/a |
| PATS transponder · H72/H92 4D63 | 1998–2011 NA + GCC export | n/a | 164-R8040 | Texas 4D63 80-bit (H92-PT) | n/a | n/a | H72 / H84 / H92-PT |
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: required — NASTF + autokeyprog + FORScan.
- Online / server access: not required (offline programming).
- On-board (no tool) sequence: not available — Mercury Grand Marquis 4D60 PATS requires professional OBD tool — no self-programming procedure.
- On site: engine off · Maintain 12V+ · Clear PATS 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 Mercury Grand Marquis (1998-2011) uses Texas 4D60 — transitional Ford PATS chip. Covered by Autel IM608 + IMKPA, AD Smart Pro ADS178, Lonsdor K518 USA. PATS PIN via FORScan / autokeyprog.com.
- Smart proximity or remote head key: ensure existing key fob battery is functional before starting.
- Verify chip before booking (this chassis facelift): Ford modern PATS spans PATS 5/6 ID46 HITAG-2 (2011-2014 typical) and PATS 7 ID49 HITAG-PRO (2014+). Some 2014-2015 facelifts shipped with mid-cycle chip swap — confirm transponder ID from a working key with FORScan or Lonsdor K518 reader before quoting.
- Tool kit context: Autel IMKPA Ford module is the dominant add-key accessory (~$5-15/session for ID49 cloud calc). AD Smart Pro ADS178 also strong on Ford. Lonsdor LKE Smart Key Emulator for K518 simulated-key flow. Xhorse KH100 + Ford module confirmed. APB112 simulator NOT typically needed. G-Box bench EEPROM NOT used. XP400 PRO only for PCM/IPC bench fallback.
- All existing keys erased. Bring ALL replacement keys before starting — minimum 2.
- No manual AKL for Mercury Grand Marquis 4D60 PATS — professional tool mandatory.
- AKL for Ford 4D60 PATS needs PATS PIN (FORScan / autokeyprog / NASTF) AND online cloud token on ID49 era.
- Keep all existing/lost key fobs at least 10 metres from vehicle during AKL.
- AKL accessory needs: Autel IMKPA + Ford online token for ID49 cloud calc, Lonsdor LKE Smart Key Emulator for K518 simulated-key AKL path, Xhorse KH100 Ford. APB112 NOT mandatory. G-Box bench EEPROM NOT used. XP400 PRO only if PCM/IPC EEPROM corrupted (rare).
Lockout
Door pick / decode: Lishi FO38 (CW).
62 verified sources · Last verified: 2026-08-10
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.