SAFARI BSVI SERVICE MANUAL

ELECTRICAL 146 secret key for mutual authentication. If any one of EMS or ICU has different/ wrong secret key, vehicle will be locked (engine cannot be started). 4. If EMS or IBCM is changed in a vehicle, it is required pairing operation (EMS ECU & ICU programmed with same secret key) for proper mutual authentication. The pairing of EMS and Immobilizer can be done through diagnostic tester. 5. These E-keys are learned for that BCM_IMMO and are unique to that BCM_IMMO & vehicle. The E-key of other vehicles will not work with this BCM_IMMO and vice versa. 6. If anyone of the E-key is lost, it is recommended to approach TATA AUTHORIZED dealer for new E-key. It is possible to learn new keys with the help of diagnostic tester (Refer the key pairing procedure). IMMOBILIZER SYSTEM STATUS: If IGN is OFF/ACC, then BCM shall blink IMMO tell-tale with 0.2 second ON time and 0.8 second OFF time. If BCM is in sleep mode, then BCM shall blink IMMO tell-tale with 0.2 second ON time and 0.8 second OFF time. When the ignition key is turned to the “ON” position,  If the status bulb goes OFF indicates that the system is working and the vehicle is unlocked (Engine is ready to start).  If the status bulb is continuously ON, there may be something wrong with key or with the immobilizer system. If IGN is ON/ OFF and key learning is on-going, then BCM shall blink IMMO tell-tale with 0.1 second ON time and 0.4 second OFF time.