FAIL-SAFE CHART
1. HID Headlight System
(a) Light Control ECU
(1) The light control ECU stops illuminating the HID headlights when any of the following abnormalities are detected.
Condition |
Content |
---|---|
Open in output side circuit |
|
Short between output terminals |
|
Leak between output terminal and ground point |
|
Excessively low output voltage |
|
Excessively high output voltage |
|
Excessively high input voltage |
|
Low input voltage |
|
2. Automatic Headlight Beam Level Control System
(a) The headlight leveling ECU assembly operates in fail-safe mode if an abnormal condition such as those listed below has been detected, and keep the last high beam status.
Item |
Abnormality Detection Condition |
Return Condition |
Warning Indicator |
---|---|---|---|
Height control sensor power source voltage |
Abnormal height control sensor power source voltage (4.6 V or less, or 6.25 or more) is detected. |
Abnormal voltage is not detected for 5 seconds consecutively |
Illuminated |
Height control sensor signal voltage |
Abnormal height control sensor signal voltage (0.25 V or less, or 4.75 V or more) is detected. |
||
High power source voltage |
Abnormal high ignition voltage (18.5 V or more) is detected. |
Voltage of 17.5 V or less is detected |
Not illuminated |
Low power source voltage |
Abnormal low ignition voltage (9.0 V or less) is detected. |
Voltage of 9.3 V or more is detected for 0.1 seconds consecutively |
Not illuminated |
Reset while running |
Reset by a temporary blackout etc. while running. |
Vehicle is stopped |
Not illuminated |
3. Automatic Light Control System
If the main body ECU (driver side junction block assembly) detects a malfunction in the automatic light control sensor, the main body ECU (driver side junction block assembly) effects fail-safe control to prohibit the automatic light control. If the low beam headlights and taillights are on, the lights will remain on until the light control switch is turned off.
4. Automatic High Beam System
(a) The main body ECU (driver side junction block assembly) operates in the fail-safe mode if an abnormal condition such as those listed below has been detected.
Item |
Abnormality Detection Condition |
Return Condition |
Warning indicator |
---|---|---|---|
Steering Angle Sensor Signal Malfunction |
Steering angle sensor Malfunction is detected. |
Steering angle sensor malfunction is not detected, and ignition switch is turned to ON again. |
Flash |
Steering angle sensor zero point memory invalid is detected. |
Steering angle sensor zero point memory valid is detected. |
Not illuminated |
|
Steering angle sensor data continuity invalid is detected. |
Steering angle sensor data continuity invalid flag is detected. |
Not illuminated |
|
Speed Sensor Signal Malfunction |
Abnormal speed sensor signal is detected. |
Normal speed sensor signal is detected. |
Flash |
CAN Communication Signal Malfunction |
Normal CAN communication signal is not detected for more than 10 seconds consecutively. |
Normal CAN communication signal is detected. |
Flash |
Automatic High Beam Sensor |
Communication stopped for 10 seconds consecutively. |
Normal communication signal is detected. |
Flash |
Throttle Actuator Control Motor Circuit Low (P2102,P2103)
DESCRIPTION
The throttle actuator is operated by the ECM and opens and closes the throttle
valve using gears.
The opening angle of the throttle valve is detected by the throttle position
sensor, which is mounted on the throttle body. The throttle positio ...
Terminals Of Ecu
TERMINALS OF ECU
1. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
(a) Disconnect the D25 certification ECU (smart key ECU assembly) connector.
(b) Measure the voltage and resistance according to the value(s) in the table
below.
HINT:
Measure the va ...
Removal
REMOVAL
PROCEDURE
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-)
battery terminal to disable the SRS system (See page
).
NOTICE:
When disconnecting the cable, s ...