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.
2003 Suzuki Aerio L4-2.0LFACTORY OEM SERVICE PROCEDURE
Keyless Entry Relay: Testing and Inspection
Keyless Answer Back Relay Inspection
1. Check that there is no continuity between terminal "C" and "D". If there is continuity, replace relay.
2. Connect battery positive (+) terminal to terminal "B" of relay.
Connect battery negative (-) terminal to terminal "A" of relay.
Check continuity between terminal "C" and "D".
If there is no continuity when relay is connected to the battery, replace relay.
1. Check that there is no continuity between terminal "C" and "D". If there is continuity, replace relay.
2. Connect battery positive (+) terminal to terminal "B" of relay.
Connect battery negative (-) terminal to terminal "A" of relay.
Check continuity between terminal "C" and "D".
If there is no continuity when relay is connected to the battery, replace relay.
Factory Service Tools
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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.
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