Dtc Description

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors

  (NATS antenna circuit is open or shorted.)

• Push-button ignition switch (NATS antenna)

• Intelligent Key unit

FAIL-SAFE

—

Confirmation Procedure

1. PERFORM DTC CONFIRMATION PROCEDURE

   1. CONSULT

      1. Select “INSIDE/OUTSIDE ANT DIAGNOSIS” in “Work support” mode of “HANDS FREE MODULE”.

      2. Select “Self Diagnostic Result” mode of “HANDS FREE MODULE”.

   Is the DTC detected?

   YES >>

   Refer to DTC Diagnosis Procedure.

   NO >>

   To check malfunction symptom before repair: Refer to Intermittent Incident.

   NO >>

   Confirmation after repair: Inspection End.

Dtc Diagnosis Procedure

1. CHECK NATS ANTENNA COMMUNICATION SIGNAL

   1. Check signal between push-button ignition switch harness connector and ground using an oscilloscope.

      (+)		(–)	Condition		Signal (Reference value)
      Push-button ignition switch
      Connector	Terminal
      M25	2	Ground	Intelligent Key battery is removed and brake pedal is depressed	When a registered Intelligent Key backside is contacted to push-button ignition switch	0 V
      				Other than above
      	3			When a registered Intelligent Key backside is contacted to push-button ignition switch	0 V
      				Other than above

   Is the inspection result normal?

   YES >>

   GO TO 3.

   NO >>

   GO TO 2.

2. CHECK NATS ANTENNA COMMUNICATION SIGNAL CIRCUIT

   1. 1. Ignition switch OFF.

      2. Disconnect Intelligent Key unit connector and push-button ignition switch connector.

      3. Check continuity between push-button ignition switch harness connector and Intelligent Key unit harness connector.

         Push-button ignition switch		Intelligent Key unit		Continuity
         Connector	Terminal	Connector	Terminal
         M25	2	M155	19	Yes
         	3		20

      4. Check continuity between push-button ignition switch harness connector and ground.

         Push-button ignition switch		—	Continuity
         Connector	Terminal
         M25	2	Ground	No
         	3

   Is the inspection result normal?

   YES >>

   GO TO 3.

   NO >>

   Repair or replace harness.

3. REPLACE PUSH-BUTTON IGNITION SWITCH

   1. Replace push-button ignition switch. Refer to Removal and Installation.

   Is the inspection result normal?

   YES >>

   Inspection End.

   NO >>

   GO TO 4.

4. REPLACE INTELLIGENT KEY UNIT

   1. Replace Intelligent Key unit. Refer to Removal and Installation.

   >>

   Inspection End.