DESCRIPTION
The millimeter wave radar sensor assembly is connected to the skid control ECU (master cylinder solenoid)*1 or skid control ECU (brake actuator assembly)*2 via CAN communication. If communication with the skid control ECU (master cylinder solenoid)*1 or skid control ECU (brake actuator assembly)*2 stops, the millimeter wave radar sensor assembly stores DTC U0235.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
---|---|---|---|
U0235 |
Lost Communication with Cruise Control Front Distance Range Sensor |
When the ignition switch is ON, a communication error between the millimeter wave radar sensor assembly and skid control ECU (master cylinder solenoid)*1 or skid control ECU (brake actuator assembly)*2 is detected for approximately 2 seconds. |
|
CAUTION / NOTICE / HINT
NOTICE:
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PROCEDURE
1. |
CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM) |
(a) Check for DTCs.
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Result |
Proceed to |
---|---|
Vehicle stability control system DTCs are not output |
A |
Vehicle stability control system DTCs are output |
B |
B |
GO TO VEHICLE STABILITY CONTROL SYSTEM |
|
2. |
TEST MODE INSPECTION (VEHICLE STABILITY CONTROL SYSTEM) |
HINT:
When entering Test Mode (Signal Check), the skid control ECU (master cylinder solenoid)*1 or skid control ECU (brake actuator assembly)*2 communicates with the millimeter wave radar sensor assembly to judge whether the vehicle is equipped with the pre-collision system. Therefore, do not exit Test Mode (Signal Check) within 5 seconds of entering Test Mode (Signal Check).
(a) Procedure to enter Test Mode
(1) Turn the ignition switch off.
(2) Check that the steering wheel is centered.
(3) Check that the shift lever is in P.
(4) Connect the Techstream to the DLC3.
(5) Turn the ignition switch to ON.
(6) Turn the Techstream on.
(7) Switch the skid control ECU (master cylinder solenoid)*1 or skid control ECU (brake actuator assembly)*2 to Test Mode (Signal Check) using the Techstream. Enter the following menus: Chassis / ABS/VSC/TRAC / Utility / Signal Check.
HINT:
Do not exit Test Mode (Signal Check) within 5 seconds of entering Test Mode (Signal Check). If Test Mode (Signal Check) is exited within 5 seconds of entering Test Mode (Signal Check), DTC U0235 may be stored. If DTC U0235 is output after exiting Test Mode (Signal Check), enter Test Mode (Signal Check) again, wait at least 5 seconds, then recheck for DTCs.
(8) Check that the ABS warning and slip indicator lights come on for several seconds and then blink in the Test Mode (Signal Check) pattern.
HINT:
If the ABS warning and slip indicator lights do not blink, inspect the ABS warning and slip indicator light circuits.
(b) End Test Mode (Signal Check)
(1) Turn the ignition switch off to exit mode.
(2) Disconnect the Techstream.
|
3. |
CHECK FOR DTCs (PRE-COLLISION SYSTEM) |
(a) Clear the DTCs.
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(b) Make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the system cannot detect the malfunction.
(c) Check for DTCs.
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Result |
Proceed to |
---|---|
DTC U0235 is not output |
A |
DTC U0235 is output |
B |
A |
END |
B |
REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY |
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Definition Of Terms
DEFINITION OF TERMS
Term
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Description of what the ECM monitors and how it detects malfunctions
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