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.
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HOMESERVICE MANUALSCADILLAC1996ELDORADO V8-4.6L VIN 9REPAIR AND DIAGNOSISACCESSORIES AND OPTIONAL EQUIPMENTANTITHEFT AND ALARM SYSTEMSSERVICE AND REPAIRREPLACING LOST IGNITION KEYS - PASS-KEY II
1996 Cadillac Eldorado V8-4.6L VIN 9
Replacing Lost Ignition Keys - PASS-Key II
1996 Cadillac Eldorado V8-4.6L VIN 9SECTION Replacing Lost Ignition Keys - PASS-Key II
To replace lost PASS-Key II ignition keys it is necessary to determine the mechanical cut and the electrical key code.
The mechanical and electrical codes are recorded on the vehicle invoice. If these codes are available, use them to create a new key. if they are not, follow the procedure below.
The mechanical cut must be determined first. The mechanical cut can be determined from the key code on the ignition lock cylinder or from the original key "knock outs." If the mechanical cut cannot be determined, the ignition lock cylinder should, be replaced. Make a key with the correct mechanical cut to use while determining the proper electrical key code.
To determine the proper electrical key code, use tool J 35628-A and adapter harness J 35628-90 and the following procedures:
1. Connect the tool wiring to the PASS-Key II dash connector at the base of the steering column. Do not connect to the Steering Column wiring.
2. Turn J 35628-A on and place key code switch to "1" and attempt to start engine with proper mechanically cut key. if engine starter, the key code is "1".
3. If engine does into start, turn ignition off and press 4 minute timer on J 35628-A.
4. When the timer light goes out, or the "START CAR" message is displayed, place key code switch to "2" and attempt to start engine. If engine starts, key code is "2".
5. Continue trying different key codes until proper key code is found.
Make a new key with the proper PASS-Key II key code and mechanical cut.
The mechanical and electrical codes are recorded on the vehicle invoice. If these codes are available, use them to create a new key. if they are not, follow the procedure below.
The mechanical cut must be determined first. The mechanical cut can be determined from the key code on the ignition lock cylinder or from the original key "knock outs." If the mechanical cut cannot be determined, the ignition lock cylinder should, be replaced. Make a key with the correct mechanical cut to use while determining the proper electrical key code.
To determine the proper electrical key code, use tool J 35628-A and adapter harness J 35628-90 and the following procedures:
1. Connect the tool wiring to the PASS-Key II dash connector at the base of the steering column. Do not connect to the Steering Column wiring.
2. Turn J 35628-A on and place key code switch to "1" and attempt to start engine with proper mechanically cut key. if engine starter, the key code is "1".
3. If engine does into start, turn ignition off and press 4 minute timer on J 35628-A.
4. When the timer light goes out, or the "START CAR" message is displayed, place key code switch to "2" and attempt to start engine. If engine starts, key code is "2".
5. Continue trying different key codes until proper key code is found.
Make a new key with the proper PASS-Key II key code and mechanical cut.
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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.