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Home >> Infiniti >> 2022 >> Q50 Luxe, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 30 (Security Control System (Diagnostics)) >> Description >> System >> NISSAN Vehicle Immobilizer System-NATS >> System Description - With Intelligent Key System >> Engine Start Operation When Intelligent Key Is Contacted To Push-Button Ignition Switch

Engine Start Operation When Intelligent Key Is Contacted To Push-Button Ignition Switch

WARNING: This page is about a different car, the 2022 Nissan Rogue Sport. However, it is still accessible from the selected car via links, so may be relevant.
  1. When brake pedal is depressed while selector lever is in the P position (CVT models), or clutch pedal is depressed (M/T models), BCM activates NATS antenna amp. that is located behind push-button ignition switch.
  2. When Intelligent Key (transponder built-in) backside is contacted to push-button ignition switch, BCM starts NATS ID verification between BCM and Intelligent Key (transponder built-in) via NATS antenna amp.
  3. When NATS ID verification result is OK, buzzer in combination meter sounds.
  4. When the ignition switch is turned to ON, BCM performs ID verification with the ECM. When the result is OK, engine start is permitted.
  5. BCM detects that the selector lever position and brake pedal operation condition.
  6. When ECM detects that the start engine conditions* are satisfied, it transmits a starter control relay request signal to BCM.
  7. When BCM receives a starter control relay request signal from ECM, the starter control relay is turned ON.
  8. When starter control relay is turned ON, IPDM E/R turns ON the starter relay and drives the starter motor.
  9. When BCM receives an engine status signal from ECM, it turns the starter relay and starter control relay OFF and stops cranking.

*: For the engine start condition, refer to "IGNITION SWITCH POSITION CHANGE TABLE BY PUSH-BUTTON IGNITION SWITCH OPERATION" below.

  1. When brake pedal is depressed while selector lever is in the P position, BCM activates NATS antenna amp. that is located behind push-button ignition switch.
  2. When Intelligent Key (transponder built-in) backside is contacted to push-button ignition switch, BCM starts NATS ID verification between BCM and Intelligent Key (transponder built-in) via NATS antenna amp.
  3. When NATS ID verification result is OK, buzzer in combination meter sounds.
  4. When the ignition switch is turned to ON, BCM performs ID verification with the ECM. When the result is OK, engine start is permitted.
  5. BCM detects that the selector lever position and brake pedal operation condition.
  6. When ECM detects that the start engine conditions* are satisfied, it transmits a starter control relay request signal to BCM.
  7. When BCM receives a starter control relay request signal from ECM, the starter control relay is turned ON.
  8. When starter control relay is turned ON, IPDM E/R turns ON the starter relay and drives the starter motor.
  9. When BCM receives an engine status signal from ECM, it turns the starter relay and starter control relay OFF and stops cranking.

*: For the engine start condition, refer to "IGNITION SWITCH POSITION CHANGE TABLE BY PUSH-BUTTON IGNITION SWITCH OPERATION" below.

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