Diagnosis System [06/2015 - ]

DESCRIPTION
1. The certification ECU (smart key ECU assembly) and EV control ECU control the vehicle immobiliser system functions. Immobiliser system data and Diagnostic Trouble Codes (DTCs) can be read through the vehicle Data Link Connector 3 (DLC3).
  In some cases, a malfunction may be occurring in the immobiliser system even though the security indicator light is not illuminated.
  
  When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs.
CHECK DLC3
1. Check the DLC3.
  Refer to GENERAL INFORMATION [06/2015 - ]
INSPECT AUXILIARY BATTERY VOLTAGE
1. Measure the auxiliary battery voltage with the power switch off.
  Standard voltage
  
  11 to 14 V (IG OFF)
  
  If the voltage is below 11 V, recharge or replace the auxiliary battery.

START FUNCTION PROBLEM SYMPTOMS

Symptom	Suspected Area	Component Malfunction	Possible Output DTCs	Related Data List Item
Hybrid control system cannot be started*1	Certification ECU (smart key ECU assembly)	Open or short circuit inside ECU	B278A B2799 B279A	# Codes Immobilizer when IG=ON Immobiliser Master Key Sub Key BCC Malfunction Abnormal Status Different Encrypt Code Different Serial Number Frame Error Response Wireless Starter Com ID Wireless C Code System Start Condition ID-BOX Sleep Condition ID-BOX Start Condition System Start Request 3bit Code Request S Code Check L Code Check Unlock Request Receive Lock Request Receive S Code Check (Past) L Code Check (Past) EV Code Receive EV ECU Communication
Hybrid control system cannot be started*1	ID code box (immobiliser code ECU)	Open or short circuit inside ECU	B2790 B2799 B279A	Immobilizer when IG=ON Immobiliser Master Key Sub Key BCC Malfunction Abnormal Status Different Encrypt Code Different Serial Number Frame Error Response ID-BOX Sleep Condition ID-BOX Start Condition System Start Request 3bit Code Request S Code Check L Code Check S Code Check (Past) L Code Check (Past) EV Code Receive EV ECU Communication
	EV control ECU	Open or short circuit inside ECU	B2799 B279A B279C	EV Code Receive
	Hybrid control	EV control ECU incompatible with installed immobiliser system	B279C	System Start Condition EV Code Receive
Power source mode cannot be changed*1	Power switch	Open or short circuit inside switch	B278A	Unlock Request Receive Lock Request Receive
Power source mode cannot be changed*1	Certification ECU (smart key ECU assembly)	Open or short circuit inside ECU	B2271 B2274	Immobilizer when IG=ON Immobiliser
Gearshift control lock/unlock not possible*2	Transmission control ECU assembly	Open or short circuit inside ECU Actuator stuck	-	Unlock Request Receive Lock Request Receive

*1: Refer to Problem Symptoms Table for Smart Key System (for Start Function).
Refer to PROBLEM SYMPTOMS TABLE [06/2015 - ]
*2: Refer to Problem Symptoms Table for Electronic Shift Lever System.
Refer to PROBLEM SYMPTOMS TABLE [06/2015 - ]