Toyota Corolla Cross: Image from Camera for Parking Assist Monitor is Abnormal
DESCRIPTION
The display signal from the rear television camera assembly is transmitted to the display.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
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 parking assist monitor system may be needed.
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HINT:
Images may be unclear even in normal conditions if:
- Electrical devices are used in the cabin (noise may occur in the image).
- Accessories that generate radio waves have been installed (noise may occur in the image).
- The display of radio and display receiver assembly is cold (the image immediately after turning the ignition switch to ON may be blurred or darker than normal).
- The camera lens is dirty with snow, mud, etc.
- A strong beam of light, such as a sunbeam or headlight, hits the camera.
- It is too dark around the camera (at night, etc.).
- The ambient temperature around the camera is either too high or too low.
- The vehicle is tilted at a steep angle.
- The television camera assembly lens is scratched.
- The television camera assembly lens has drops of water on it or the humidity is high.
- When the camera is used under fluorescent lights, sodium lights, mercury lights, etc., the lights and the illuminated area may appear to flicker.
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - REAR TELEVISION CAMERA ASSEMBLY) |
(a) Disconnect the I278 radio and display receiver assembly connector.
(b) Disconnect the U48 rear television camera assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I278-2 (CB+) - U48-4 (CB+) |
Always |
Below 1 Ω |
|
I278-3 (CV+) - U48-6 (CV+) |
Always |
Below 1 Ω |
|
I278-1 (CGND) - U48-3 (CGND) |
Always |
Below 1 Ω |
|
I278-4 (CV-) - U48-5 (CV-) |
Always |
Below 1 Ω |
|
I278-5 (SGND) - U48-7 (SGND) |
Always |
Below 1 Ω |
|
I278-2 (CB+) or U48-4 (CB+) - Body ground |
Always |
10 kΩ or higher |
|
I278-3 (CV+) or U48-6 (CV+) - Body ground |
Always |
10 kΩ or higher |
|
I278-1 (CGND) or U48-3 (CGND) - Body ground |
Always |
10 kΩ or higher |
|
I278-4 (CV-) or U48-5 (CV-) - Body ground |
Always |
10 kΩ or higher |
|
I278-5 (SGND) or U48-7 (SGND) - Body ground |
Always |
10 kΩ or higher |
| NG | .gif)
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
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|
2. |
CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY |
(a) Remove the radio and display receiver assembly with its connectors still connected.
Click here
|
*a |
Component with harness connected (Radio and Display Receiver Assembly) |
- |
- |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I278-4 (CV-) - Body ground |
Always |
Below 1 Ω |
|
I278-1 (CGND) - Body ground |
Always |
Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
I278-2 (CB+) - Body ground |
Ignition switch ACC |
6 to 9 V |
|
Ignition switch off |
Below 1 V |
| NG |
|
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY |
|
|
3. |
CHECK REAR TELEVISION CAMERA ASSEMBLY |
(a) Remove the radio and display receiver assembly with its connectors still connected.
Click here
|
*a |
Component with harness connected (Radio and Display Receiver Assembly) |
*b |
Waveform 1 |
|
*c |
Waveform 2 |
*d |
Synchronization Signal |
|
*e |
Video Waveform |
- |
- |
(b) Check the waveform of the rear television camera assembly using an oscilloscope.
HINT:
- A waterproof connector is used for the rear television camera assembly. Therefore, inspect the waveform at the radio and display receiver assembly with the connector connected.
- The video waveform changes according to the image sent by the rear television camera assembly.
|
Item |
Content |
|---|---|
|
Terminal No. (Symbol) |
I278-3 (CV+) - I278-1 (CGND) |
|
Tool Setting |
200 mV/DIV., 50 μsec./DIV. |
|
Condition |
Waveform 1: Ignition switch ON, shift position in R, camera lens not covered, displaying an image Waveform 2: Ignition switch ON, shift position in R, camera lens covered, blacking out screen |
OK:
Waveform is as shown in the illustration.
| OK |
|
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY |
|
|
4. |
CHECK REAR TELEVISION CAMERA ASSEMBLY |
(a) Replace the television camera assembly with a new or known good one.
Click here
(b) Check if the same malfunction reoccurs when the rear view monitor screen is displayed.
OK:
Malfunction does not reoccur (returns to normal).
| OK |
|
END (REAR TELEVISION CAMERA ASSEMBLY WAS DEFECTIVE) |
| NG |
|
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY |
READ NEXT:
Precaution
PRECAUTION
SENSOR EXPRESSIONS
(a) The descriptions for the blind spot monitor sensors differ
depending on the system. The expressions listed in the table below are used in this
Repair Manual.
Parts Location
PARTS LOCATION
ILLUSTRATION
*A
for Gasoline Model
*B
for HEV Model
*1
BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)
SEE MORE:
Inspection
INSPECTION
PROCEDURE
1. INSPECT BRAKE VACUUM CHECK VALVE ASSEMBLY
(a) Check that there is ventilation from the booster side
to the engine side, and no ventilation from the engine side to the booster
side of the brake vacuum check valve assembly.
HINT:
If the result is not
Ambient Temperature Sensor Circuit Short to Ground (P007011)
DESCRIPTION The thermistor assembly is installed in front of the cooler condenser assembly to detect the ambient temperature, which is used to control the air conditioning system. This sensor is connected to the air conditioning amplifier assembly and detects fluctuations in the ambient temperature.
