DESCRIPTION DTC C1681 is
stored if the parking assist ECU judges as a result of its self check
that a synchronization problem is occurring in the image signal sent
from the front television camera assembly to the parking assist ECU . |
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
DTC Output from | |
C1681 | Front Camera Feedback Malfunction |
Front television camera power supply failure |
- Harness or connector
- Front television camera assembly
- Parking assist ECU
| Parking assist ECU | WIRING DIAGRAM
 CAUTION / NOTICE / HINT
NOTICE:
- When "!" is displayed on the radio and display receiver assembly after
the cable is disconnected from the negative (-) battery terminal,
correct the steering angle neutral point.
Click here 
- Depending on the parts that are replaced or operations that are
performed during vehicle inspection or maintenance, calibration of other
systems as well as the panoramic view monitor system may be needed.
Click here
PROCEDURE |
1. | CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - FRONT TELEVISION CAMERA ASSEMBLY) |
(a) Disconnect the K36 parking assist ECU connector. (b) Disconnect the B5 front television camera assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
K36-15 (BCB+) - B5-6 (BCB+) |
Always | Below 1 Ω | |
K36-13 (BCV+) - B5-3 (BCV+) |
Always | Below 1 Ω | |
K36-14 (BCV-) - B5-2 (BCV-) |
Always | Below 1 Ω | |
K36-27 (BGND) - B5-5 (BGND) |
Always | Below 1 Ω | |
K36-25 (SGND) - Body ground |
Always | 10 kΩ or higher | |
K36-15 (BCB+) or B5-6 (BCB+) - Body ground |
Always | 10 kΩ or higher | |
K36-13 (BCV+) or B5-3 (BCV+) - Body ground |
Always | 10 kΩ or higher | |
K36-14 (BCV-) or B5-2 (BCV-) - Body ground |
Always | 10 kΩ or higher | |
K36-27 (BGND) or B5-5 (BGND) - Body ground |
Always | 10 kΩ or higher |
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK |
 | |
| 2. |
CHECK PARKING ASSIST ECU (BCV-, BGND) |
(a) Disconnect the K36 parking assist ECU connector.
| (b) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
27 (BGND) - Body ground |
Always | Below 1 Ω | |
14 (BCV-) - Body ground |
Always | Below 1 Ω | |
 |
|
*a | Component without harness connected
(Parking Assist ECU) | | |
| NG |
| REPLACE PARKING ASSIST ECU |
|
OK | |
| |
| 3. |
CHECK PARKING ASSIST ECU (BCB+, BGND) |
| (a) Remove the parking assist ECU with the connector still connected. |
 |
|
*a | Component with harness connected
(Parking Assist ECU) | | |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
K36-27 (BGND) - Body ground |
Always | Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below. Standard Voltage: |
Tester Connection | Condition |
Specified Condition | |
K36-15 (BCB+) - K36-27 (BGND) |
Engine switch on (ACC) |
5.5 to 7.05 V |
| NG |
| REPLACE PARKING ASSIST ECU |
|
OK | |
| |
| 4. |
CHECK FRONT TELEVISION CAMERA ASSEMBLY (BCV+, BGND) |
(a) Remove the parking assist ECU with the connector still connected. (b) Using an oscilloscope, check the waveform of the front television camera assembly.
HINT: A
waterproof connector is used for the front television camera assembly.
Therefore, inspect the waveform at the parking assist ECU with the
connector connected. 
|
*a | Component with harness connected
(Parking Assist ECU) | *b |
Waveform 1 (camera lens not covered, displaying an image) | |
*c | Waveform 2 (camera lens covered, blacking out the screen) |
*d | Synchronization Signal | |
*e | Video Waveform |
- | - |
HINT:
- The video waveform changes according to the image sent by the front television camera assembly.
- The video waveform is constantly output when the engine switch is on (ACC).
Measurement Condition |
Item | Content | |
Terminal No. (Symbol) |
K36-13 (BCV+) - K36-27 (BGND) | |
Tool Setting | 200 mV/DIV., 50 μsec./DIV. | |
Condition | Engine switch on (IG), panoramic view monitor system operating |
OK: Waveform is similar to that shown in the illustration.
| OK |
| REPLACE PARKING ASSIST ECU |
| NG |
| REPLACE FRONT TELEVISION CAMERA ASSEMBLY | | 
