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.
Check Keyless Entry Control Module
- CHECK LAN SYSTEM
.
Perform the diagnosis for LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .
Is LAN system normal?
Yes
Keyless entry control module is normal.
No
Go to 2 .
- CHECK POWER SUPPLY
.
- Disconnect the keyless entry control module connector.
- Measure the voltage between keyless entry control module connector and chassis ground.
Connector & terminal
(R221) No. 12 (+) - Chassis ground (-):
Is the voltage 10 V or more?
Yes
Go to 3 .
No
Check the harness for open or short circuits between the keyless entry control module and the fuse.
- CHECK GROUND CIRCUIT
.
Measure the resistance between keyless entry control module connector and chassis ground.
Connector & terminal
(R221) No. 7 - Chassis ground:
Is the resistance less than 10 Ω?
Yes
Replace the keyless entry control module.
No
Repair or replace the harness.
Use the Manual With the Right Hardware
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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.