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 |
---|---|---|---|
C1681 | Front Camera Feedback Malfunction | Front television camera power supply failure |
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
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PROCEDURE
1. | CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - FRONT TELEVISION CAMERA ASSEMBLY) |
(a) Disconnect the J158 parking assist ECU connector.
(b) Disconnect the p1 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 |
---|---|---|
J158-15 (BCB+) - p1-6 (BCB+) | Always | Below 1 Ω |
J158-36 (BCV+) - p1-3 (BCV+) | Always | Below 1 Ω |
J158-13 (BCV-) - p1-2 (BCV-) | Always | Below 1 Ω |
J158-37 (BGND) - p1-5 (BGND) | Always | Below 1 Ω |
J158-14 (SGND) - Body ground | Always | Below 1 Ω |
J158-15 (BCB+) or p1-6 (BCB+) - Body ground | Always | 10 kΩ or higher |
J158-36 (BCV+) or p1-3 (BCV+) - Body ground | Always | 10 kΩ or higher |
J158-13 (BCV-) or p1-2 (BCV-) - Body ground | Always | 10 kΩ or higher |
J158-37 (BGND) or p1-5 (BGND) - Body ground | Always | 10 kΩ or higher |
NG | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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2. | CHECK PARKING ASSIST ECU (BCV-, BGND) |
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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NG | REPLACE PARKING ASSIST ECU |
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3. | CHECK PARKING ASSIST ECU (BCB+, BGND) |
(a) Connect the J158 parking assist ECU connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Switch Condition | Specified Condition |
---|---|---|
J158-15 (BCB+) - J158-37 (BGND) | Engine switch on (IG) | 5.5 to 7.05 V |
NG | REPLACE PARKING ASSIST ECU |
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4. | CHECK FRONT TELEVISION CAMERA ASSEMBLY (BCV+, BGND) |
(a) Connect the p1 front television camera assembly connector.
(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 |
*c | Waveform 2 | *d | Synchronization Signal |
*e | Video Waveform | - | - |
Item | Content |
---|---|
Terminal No. (Symbol) | J158-36 (BCV+) - J158-37 (BGND) |
Tool Setting | 200 mV/DIV., 50 μs./DIV. |
Condition |
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HINT:
OK:
Waveform is similar to that shown in the illustration.
OK | REPLACE PARKING ASSIST ECU |
NG | REPLACE FRONT TELEVISION CAMERA ASSEMBLY |
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