DIAGNOSIS AND REPAIR WORK FLOW

Pre-Inspection for Multi-System Diagnostic

The engine start function, door lock function, power distribution system and NATS-IVIS/NVIS are closely related to each other. Narrow down the system in question by performing this Inspection to identify which system is malfunctioning. For example, the vehicle security system can operate only when the door lock and power distribution system are operating normally.
1.CHECK DOOR LOCK OPERATION
Check the door lock for normal operation with the Intelligent Key and door request switch.
Successful door lock operation with the Intelligent Key and request switch indicates that the remote keyless entry receiver and inside key antenna required for engine start are functioning normally.
Can the door be locked with the Intelligent Key and door request switch?
YES >> GO TO 2.
NO >> Refer to See: Accessories and Optional Equipment\Keyless Entry\Testing and Inspection\Symptom Related Diagnostic Procedures\Intelligent Key System Symptoms\Coupe.
2.CHECK ENGINE STARTING
Check that the engine starts when the Intelligent Key is inserted into the key slot.
Does the engine start?
YES >> GO TO 3.
NO >> Refer to See: Accessories and Optional Equipment\Antitheft and Alarm Systems\Testing and Inspection\Symptom Related Diagnostic Procedures\Intelligent Key System/Engine Start Function Symptoms\Coupe.
3.CHECK STEERING LOCK OPERATION
Check that the steering locks when operating the door switch after switching the power supply from ON position (or ACC position) to LOCK position.
If the door switch is malfunctioning, BCM cannot lock the steering. If BCM does not detect DTC, steering lock unit is normal.
Does steering lock?
YES >> GO TO 4.
NO >> Refer to See: Body and Frame\Locks\Power Locks\Testing and Inspection\Component Tests and General Diagnostics\Door Switch\Component Function Check\Coupe.

4.CHECK POWER SUPPLY INDICATOR SWITCHING
Press push-button ignition switch and check that the position indicator switches from LOCK, through ACC to
ON when steering is locked.
Is each position indicator illuminating?
YES >> GO TO 5.
NO >> Refer to See: Power and Ground Distribution\Testing and Inspection\Component Tests and General Diagnostics\Push-Button Ignition Switch Position Indicator\Component Function Check.
5.CHECK VEHICLE SECURITY SYSTEM
Check the vehicle security system for normal operation. Refer to See: Accessories and Optional Equipment\Antitheft and Alarm Systems\Testing and Inspection\Initial Inspection and Diagnostic Overview\Pre-Inspection For Diagnostic\Vehicle Security Operation Check\Coupe.
Are the Inspection results normal?
YES >> Inspection End.
NO >> Repair vehicle security system as necessary.