NOTE: Use this test to quickly identify a short to ground in the door lock cylinder switches, hood switch, ignition lock anti-theft switch or their associated circuits.

Turn ignition to run. Activate power door unlock button 5 times within 10 seconds. Count number of flashes of the anti-theft warning indicator lamp. If there is only one flash, system is normal, go to ANTI-THEFT DIAGNOSIS CHART TABLE. If there are 2 flashes displayed, go to next step. If there are 3 flashes displayed, go to step 3). If there are 4 flashes displayed, go to step 4).
Two flashes indicate door lock cylinder switch input is shorted. Repair or replace door lock cylinder switches and/or circuits No. 23 (Tan/Light Green wire) and No. 25 (Dark Green/Purple wire).
Three flashes indicate hood anti-theft switch input shorted. Repair or replace hood anti-theft switch and circuit No. 486 (Brown/White wire).
Four flashes indicate door lock cylinder switch(es) and/or hood anti-theft switch input is shorted. Repair or replace door lock cylinder switch(es) and/or hood anti-theft switch and related circuits.

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.

Safety Warning

Flash Code Test

Use the Manual With the Right Hardware

When to See a Mechanic

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