DESCRIPTION
The millimeter wave radar sensor assembly communicates with the forward recognition camera via CAN communication. If there is a communication error with the forward recognition camera, the millimeter wave radar sensor assembly stores DTC U023A.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
---|---|---|---|
U023A |
Lost Communication With Image Processing Module "A" |
When the ignition switch is ON, a communication error between the forward recognition camera and millimeter wave radar sensor assembly is detected for approximately 1 second. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
Click here
HINT:
PROCEDURE
1. |
READ VALUE USING TECHSTREAM (CAN BUS CHECK) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: System Select / Can Bus Check.
Result |
Proceed to |
---|---|
All of the ECUs and sensors that are currently connected to the CAN communication system are displayed |
A |
None of the ECUs and sensors that are currently connected to the CAN communication system are displayed, or some of them are not displayed |
B |
B | ![]() |
GO TO CAN COMMUNICATION SYSTEM |
|
2. |
CHECK FOR DTCs (PRE-COLLISION SYSTEM) |
(a) Clear the DTCs.
Click here
(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.
Click here
Result |
Proceed to |
---|---|
DTC U1002 is not output |
A |
DTC U1002 is output |
B |
B | ![]() |
GO TO DTC CHART (U1002) |
|
3. |
CHECK FOR OPEN IN CAN BUS LINES (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - FORWARD RECOGNITION CAMERA) |
(a) Disconnect the F46 forward recognition camera connector.
(b) Disconnect the M8 millimeter wave radar sensor assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F46-6 (CANH) - M8-5 (CA1P) |
Cable disconnected from negative (-) battery terminal |
Below 1 Ω |
F46-12 (CANL) - M8-6 (CA1N) |
Cable disconnected from negative (-) battery terminal |
Below 1 Ω |
(d) Connect the M8 millimeter wave radar sensor assembly connector.
(e) Connect the F46 forward recognition camera connector.
NG | ![]() |
GO TO STEP 5 |
|
4. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE VOLTAGE) |
(a) Disconnect the forward recognition camera connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F46-10 (GND) - Body ground |
Always |
Below 1 Ω |
(c) Connect the cable to the negative (-) battery terminal.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F46-7 (IGB) - Body ground |
Ignition switch ON |
11 to 14 V |
(e) Connect the F46 forward recognition camera connector.
OK | ![]() |
REPLACE FORWARD RECOGNITION CAMERA |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
5. |
CHECK FOR OPEN IN CAN BUS LINES (MILLIMETER WAVE RADAR WIRE - FORWARD RECOGNITION CAMERA) |
(a) Disconnect the F46 forward recognition camera connector.
(b) Disconnect the EP1 millimeter wave radar wire connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F46-6 (CANH) - EP1-5 |
Cable disconnected from negative (-) battery terminal |
Below 1 Ω |
F46-12 (CANL) - EP1-6 |
Cable disconnected from negative (-) battery terminal |
Below 1 Ω |
(d) Connect the F46 millimeter wave radar wire connector.
(e) Connect the EP1 forward recognition camera connector.
OK | ![]() |
REPAIR MILLIMETER WAVE RADAR WIRE |
NG | ![]() |
REPAIR OR REPLACE CAN BUS LINE OR CONNECTOR (MILLIMETER WAVE RADAR WIRE - FORWARD RECOGNITION CAMERA) |
TC and CG Terminal Circuit
DESCRIPTION
Tire pressure warning system DTCs can be checked by connecting terminals 13 (TC)
and 4 (CG) of the DLC3. The DTCs are indicated by blinking the tire pressure warning
light.
WIRING DIAGRAM
PROCEDURE
1.
CHECK CAN COMMUNICATION SYSTEM
(a) Check for ...
Data List / Active Test
DATA LIST / ACTIVE TEST
DATA LIST
HINT:
Using the Techstream to read the Data List allows the values or states of switches,
sensors, actuators and other items to be read without removing any parts. This non-intrusive
inspection can be very useful because intermittent conditions or signals may ...
Steering Angle Sensor Zero Point Malfunction (C1290)
DESCRIPTION
The skid control ECU (brake actuator assembly) acquires steering angle sensor
zero point every time the ignition switch is turned ON and the vehicle is driven
at 35 km/h (22 mph) or more for approximately 5 seconds. The ECU also stores the
previous zero point.
If front wheel alig ...