Turn ignition switch to LOCK position. Using a voltmeter, backprobe appropriate terminals at Smart Entrance Control Unit (SECU) harness connector with door in appropriate position. See DOOR SWITCH INPUT VOLTAGE TEST table. See Figure . If voltage is not as specified, go to next step. If voltage is as specified, door switch input signals are okay at this time.
Test malfunctioning door switch. See DOOR SWITCH under COMPONENT TESTS. If door switch is defective, replace door switch. If door switch is okay, check door switch ground circuit and signal circuits for opens and/or shorts and repair as necessary. See WIRING DIAGRAMS .

DOOR SWITCH INPUT VOLTAGE TEST

Door Position

Terminal No. (Wire Color)

Voltage

Driver's Door

Open

15 (Green/Red)

Closed

15 (Green/Red)

Passenger's Door

Open

35 (Yellow)

Closed

35 (Yellow)

Any Door ⁽¹⁾

Open

16 (Red/Yellow)

Closed

16 (Red/Yellow)

⁽¹⁾	Check voltage at terminal No. 16 at SECU harness connector with each door open and closed, including rear hatch.

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

Door Switch Circuit Check