DESCRIPTION The forward
recognition camera communicates with the driving support ECU assembly
via CAN communication. If there is a communication error with the
driving support ECU assembly, the forward recognition camera store DTC
U1104. |
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area | |
U1104 | Lost Communication with Driving Support ECU |
2
seconds after the engine switch is turned on (IG), a communication
error between the driving support ECU assembly and the forward
recognition camera is detected for approximately 5 seconds. |
- CAN communication system
- CAN bus line
- Driving support ECU assembly
- Forward recognition camera
| WIRING DIAGRAM
 CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
- When replacing the driving support ECU assembly, always replace it with a
new one. If a driving support ECU assembly which was installed to
another vehicle is used, the information stored in the driving support
ECU assembly will not match the information from the vehicle. As a
result, a DTC may be stored.
- When replacing the forward recognition camera, always replace it with a
new one. If a forward recognition camera which was installed to another
vehicle is used, the information stored in the forward recognition
camera will not match the information from the vehicle. As a result, a
DTC may be stored.
- If the forward recognition camera has been replaced with a new one, be sure to perform forward recognition camera adjustment.
Click here 
PROCEDURE |
1. | READ VALUE USING TECHSTREAM (CAN BUS CHECK) |
(a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG).
(c) Turn the Techstream on. (d) Enter the following menus: System Select / Can Bus Check.
Click here 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 |
|
A |
 | |
(a) Turn the engine switch off.
(b) Disconnect the cable from the negative (-) battery terminal.
| (c) Disconnect the O5 forward recognition camera connector. |
 |
|
*a | Front view of wire harness connector
(to Forward Recognition Camera) | | |
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
O5-6 (CANH) - O5-12 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω | HINT: If the result is not as specified, a malfunction in a CAN communication line is suspected.
(e) Connect the O5 forward recognition camera connector.
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR (CAN BUS LINE) |
|
OK | |
| |
(a) Check for DTCs. Chassis > Front Recognition Camera > Trouble Codes
|
Result | Proceed to | |
Only DTC U1104 is output |
A | | DTC U0235 and U1104 are output |
B |
| B |
| REPLACE FORWARD RECOGNITION CAMERA |
|
A | |
| |
(a) Check for DTCs.
HINT: The malfunction area can be determined by the combination of DTCs output at the same time. Body Electrical > Pre-Collision 2 > Trouble Codes Chassis > Front Recognition Camera > Trouble Codes
|
Result | Proceed to | |
Front camera system (Front Recognition Camera) DTC U1104 and pre-collision system (Pre-Collision 2) DTC U1002 are output. |
A | | Front camera system (Front Recognition Camera) DTC U1104 and pre-collision system (Pre-Collision 2) DTC U1104 are output. |
B | | Only front camera system (Front Recognition Camera) DTC U1104 is output. |
C |
| A |
| GO TO PRE-COLLISION SYSTEM |
| B |
| REPLACE DRIVING SUPPORT ECU ASSEMBLY |
| C |
| REPLACE FORWARD RECOGNITION CAMERA | | 
