DIAGNOSIS SYSTEM
1. DESCRIPTION
(a) The certification ECU (smart key ECU assembly) and ECM control the vehicle engine immobiliser system functions. Engine 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 engine 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.
2. CHECK DLC3
(a) Check the DLC3 (See page ).
3. INSPECT BATTERY VOLTAGE
(a) Measure the battery voltage.
Standard Voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery.
4. START FUNCTION PROBLEM SYMPTOMS
Symptom |
Suspected Area |
Component Malfunction |
Possible Output DTCs |
Related Data List Item |
---|---|---|---|---|
Engine cannot be started*1 |
Certification ECU (smart key ECU assembly) |
Open or short circuit inside ECU |
|
|
ECM |
Open or short circuit inside ECU |
|
EFI Code Receive |
|
SFI system |
ECM incompatible with installed engine immobiliser system |
B279C |
|
|
Power source mode cannot be changed*1 |
Engine switch |
Open or short circuit inside switch |
B278A |
|
Certification ECU (smart key ECU assembly) |
Open or short circuit inside ECU |
|
|
|
Steering lock lock/unlock not possible*2 |
Steering lock ECU (steering lock actuator or upper bracket) |
|
|
|
Cruise Control Main Switch
Components
COMPONENTS
ILLUSTRATION
Removal
REMOVAL
PROCEDURE
1. REMOVE STEERING PAD ASSEMBLY
(See page )
2. REMOVE CRUISE CONTROL MAIN SWITCH
(a) Disconnect the connector and remove the 2 screws.
(b) Remove the cruise ...
Removal
REMOVAL
PROCEDURE
1. PRECAUTION
NOTICE:
After turning the ignition switch off, waiting time may be required before disconnecting
the cable from the negative (-) battery terminal.
Therefore, make sure to read the disconnecting the cable from the negative (-)
battery terminal notices before p ...
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
Smart Key System
DTC Code
Detection Item
See page
B27A1
Open in Driver Side Electrical Antenna Circuit
B27A5
Open in Front Floor Electrical Key Oscillator Circuit
...