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.
2012 Suzuki Grand Vitara BaseFACTORY OEM SERVICE PROCEDURE
Immobilizer Control System DTCS
IMMOBILIZER CONTROL SYSTEM DIAGNOSTIC TROUBLE CODES (DTC) LIST
| DTC | Description |
|---|---|
| DTC P1614 | Transponder response error |
| DTC P1615 | Steering lock unit communication error (for vehicle with keyless start system) |
| DTC P1616 | Unregistered keyless start control module (for vehicle with keyless start system) |
| DTC P1618 | Keyless start control module CAN communication error (for vehicle with keyless start system) |
| DTC P1621 | Immobilizer communication line error |
| DTC P1622 | EEPROM reading/writing error |
| DTC P1623 | Unregistered transponder |
| DTC P1625 | Immobilizer antenna error |
| DTC P1636 | Immobilizer information registration failure |
| DTC P1638 | Immobilizer information mismatched |
| DTC P1645 | ID code communication error |
| DTC P1646 | ID code incorrectness |
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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