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 |
Fail-safe Chart
FAIL-SAFE CHART
1. FAIL SAFE FUNCTION
(a) The following chart shows the status of the controls when the system is normal
and malfunctioning.
The passenger airbag ON/OFF indicator ("ON" and "OFF") comes on for
approximately 4 ...
Reassembly
REASSEMBLY
CAUTION / NOTICE / HINT
NOTICE:
Before installation, apply high temperature grease to the parts indicated by
arrows (See page ).
PROCEDURE
1. INSTALL NO. 2 PARKING BRAKE SHOE HOLD DOWN SPRING PIN (for 2WD)
(a) Install the No. 2 p ...
Removal
REMOVAL
CAUTION / NOTICE / HINT
NOTICE:
Release the vacuum from the booster by depressing the brake pedal several times.
Then remove the brake master cylinder from the brake booster.
PROCEDURE
1. DRAIN BRAKE FLUID
NOTICE:
If brake fluid leaks onto any ...