1998 Pontiac Firebird Formula, AutomaticFACTORY OEM SERVICE PROCEDURE

Determining BCM Programmed Key Code

To determine unknown BCM key code, PASS-Key II(R) Interrogator (J 35628-A) and following procedure.

  1. Connect PASS-Key II(R) Interrogator (J 35628-A) wiring to PASS-KEY II(R) dash connector at base of steering column. DO NOT connect to steering column wiring.
  2. Turn on PASS-Key II(R) Interrogator (J 35628-A) and move key code switch to "1" and attempt to start engine. If engine starts, key code is "1". If engine does not start, turn ignition off and press 4-minute timer on PASS-Key II(R) Interrogator (J 35628-A).
  3. When timer indicator light goes out, move key code switch to next number and attempt to start engine. If engine does not start, continue trying different key codes until proper key code is found. See PASS-Key II(R) KEY RESISTANCE table.
PASS-Key II(R) KEY RESISTANCE

Key Code No. Nominal Resistance (Ohms) Acceptable Range (Ohms)
1 402 386-438
2 523 502-564
3 681 654-728
4 887 852-942
5 1130 1085-1195
6 1470 1411-1549
7 1870 1795-1965
8 2370 2275-2485
9 3010 2890-3150
10 3740 3590-3910
11 4750 4650-4960
12 6040 5798-6302
13 7500 7200-7820
14 9530 9149-9931
15 11,800 11,328-12,292
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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.