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.
2007 Suzuki SX4 Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Keyless Start System
- General Description
- Schematic and Routing Diagram
- Diagnostic Information and Procedures
- Precautions in Diagnosing Troubles
- Self-Diagnosis Function
- Keyless Start System Diagnosis Introduction
- Keyless Start System Check
- Customer Questionnaire (Example)
- Key Indicator Light Check
- DTC Check
- DTC Table
- DTC Clearance
- Keyless Start System Symptom Diagnosis
- Keyless Start System Operation Inspection
- Door Lock Operation (Keyless Start System)
- Inspection of Keyless Start Control Module and Its Circuits
- No DTC Detection After Performing DTC Check
- Key Indicator Light Circuit Check (Key Indicator Light Doesn't Light when Ignition Knob Switch is Pushed)
- Keyless Start Control Module Power and Ground Circuit Check
- DTC No. 11: Communication Error with Steering Lock Unit
- DTC No. 13 / No. 14: Release Signal Error from Steering Lock Unit / Steering Lock Unit Malfunction
- DTC No. 21 / No. 22: Internal Error of Keyless Start Control Module (EEPROM Reading Error) / (EEPROM Writing Error)
- DTC No. 31: Lost Communication with BCM
- DTC No. 33: Control Module Communication Bus Off
- DTC No. 51 / No. 52 / No. 53: Driver Side / Passenger Side / Rear End Door Request Switch Failure
- Repair Instructions
- Antennas and Request Switches Removal and Installation
- Front Door (Driver and Passenger Side), Rear End Door Request Switch Inspection
- Steering Lock Unit Removal and Installation
- Steering Lock Unit Inspection
- Front Door Lock Switch Inspection
- Keyless Start Control Module Removal and Installation
- Remote Controller Inspection
- Replacement of Remote Controller Battery
- Registration Procedure for Remote Controller ID Code
- Keyless Start Registration
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.