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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSLEXUS2012IS 250 BASE, RWD, STANDARDREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTENTERTAINMENT SYSTEMSSAFETY CONNECT SYSTEM (DIAGNOSTICS - INTRODUCTION)SAFETY CONNECT SYSTEMPRECAUTIONPRECAUTION
2012 Lexus IS 250 Base, RWD, Standard
Safety Connect System: Precaution: Precaution
2012 Lexus IS 250 Base, RWD, StandardSECTION Precaution
- WHEN DISCONNECTING BATTERY CABLE
- Before disconnecting the cable from the negative (-) battery terminal, wait for at least 60 seconds after turning the engine switch off (w/ Navigation System (for HDD)). The HDD navigation unit stores the user settings after engine switch off.
- WHEN AUTOMATIC COLLISION NOTIFICATION HAS ACTIVATED
- Perform "ACN CALL END" with Techstream to terminate ACN (Automatic Collision Notification) with the call center. Refer to ACN CALL END .
- WHEN DISCONNECTING CONNECTORS FROM TELEMATICS DATA COMMUNICATION MODULE (DCM (TELEMATICS TRANSCEIVER))
- The engine switch must be off.
- WHEN REPLACING THE DCM (TELEMATICS TRANSCEIVER)
- After installing a new DCM (Telematics Transceiver), perform "DCM ACTIVATION" with the Techstream. Refer to DCM ACTIVATION . This allows the Telematics service provider to register the new DCM (Telematics Transceiver) and to delete the old DCM (Telematics Transceiver) information from their database.NOTE:
Do not swap the DCM (Telematics Transceiver) with one from another vehicle.
- After installing a new DCM (Telematics Transceiver), perform "DCM ACTIVATION" with the Techstream. Refer to DCM ACTIVATION . This allows the Telematics service provider to register the new DCM (Telematics Transceiver) and to delete the old DCM (Telematics Transceiver) information from their database.
- WHEN UNABLE TO CONTACT WITH CALL CENTER BUT NO DTC
- This may occur when the cellular signal strength was very weak. Check "DCM OPERATION HISTORY" with the Techstream. Refer to DCM OPERATION HISTORY .
- WHEN DIAGNOSING DCM (TELEMATICS TRANSCEIVER)
- While attempting to diagnose the DCM (Telematics Transceiver), do not use a DCM (Telematics Transceiver) from another vehicle. Each DCM (Telematics Transceiver) is registered to a specific VIN and should not be tested in another vehicle.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.