Park Assist/monitoring: Overview Toyota 4Runner IV рестайлинг

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SYSTEM DESCRIPTION

1. GENERAL To assist the driver with parking the vehicle by displaying an image of the area behind the vehicle, this system has a television camera mounted on the luggage compartment door. The system displays the image on the radio and navigation assembly. This system consists of the following components: Radio and navigation assembly Television camera assembly This system is equipped with a self-diagnosis system, which is operated on a dedicated window that appears on the display panel, just as in the navigation system.
2. FUNCTION OF COMPONENTS The radio and navigation assembly controls the system by using information from the following components: FUNCTION OF COMPONENTS Item Function Television Camera Assembly Mounted on the luggage compartment door to transmit the rear view of the vehicle to the radio and navigation assembly. A color video camera that uses a CCD (Charge Coupled Device) and a wide-angle lens. Radio and Navigation Assembly Transmits video signals, which contain an image of the area behind the vehicle taken with the television camera assembly. Radio and navigation assembly effects control of the system by receiving the shift position signal from park/neutral position switch. Displays the rear view monitor image on the display panel. Park/Neutral Position Switch Transmits a reverse shift position signal to the radio and navigation assembly.
3. OPERATION EXPLANATION The radio and navigation assembly receives the R position signal from the park / neutral position switch when the shift lever is moved to the R position. After receiving the R position signal, the radio and navigation assembly switches from the navigation system to the rear view monitor system.
4. NOTES FOR REAR VIEW MONITOR Notes for the rear view monitor. The rear view monitor may not function properly if subjected to a severe blow by any hard object. Do not "scrub" the cover part of the camera (resin made). Scrubbing it may scratch the cover and affect the image. Prevent organic solvents, waxes, bond removing solvents, or glass coating from adhering to the cover. Clean it off immediately, and wash with water. Exposing the camera to a sudden temperature change may affect proper functioning of the camera. A clear image may not appear if the camera is dirty with snow, mud, etc. In that case, wash it with water and wipe off the lens. Use a detergent to remove dirt if necessary. Images are difficult to discern even in normal conditions if: Camera screen is frosted over (the image immediately after turning the ignition switch to the on position may be blurred or darker than normal). 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. HINT: When a strong light, such as a sunbeam reflected off the vehicle's body, hits the camera, the image may be blurred. This is called the "SMEAR" phenomenon, peculiar to the CCD camera.

DESCRIPTION

The radio and navigation assembly receives a reverse signal from the park/neutral position switch.

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1. INSPECT RADIO AND NAVIGATION ASSEMBLY Disconnect the radio and navigation assembly connector R9. Measure the voltage according to the value(s) in the table below. Standard voltage RADIO AND NAVIGATION ASSEMBLY Tester connection Condition Specified condition REV - Body ground Ignition switch is ON. Shift lever is moved to R position. 10 to 14 V REV - Body ground Ignition switch is ON. Shift lever is moved to any position except R. Below 1 V OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE NG: Go to next step.
2. CHECK HARNESS AND CONNECTOR (RADIO AND NAVIGATION ASSEMBLY - PARK/ NEUTRAL POSITION SWITCH) Disconnect the radio and navigation assembly connector R9 and park/neutral position switch connector P1. Measure the resistance according to the value(s) in the table below. Standard resistance RADIO AND NAVIGATION ASSEMBLY - PARK/ NEUTRAL POSITION SWITCH Tester connection Condition Specified condition REV - P1-1 Always Below 1 ohms REV - Body ground Always 10 kohms or higher OK: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
3. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY Disconnect the park/neutral position switch connector P1. Measure the resistance according to the value(s) in the table below. Standard resistance PARK/NEUTRAL POSITION SWITCH ASSEMBLY Tester connection Condition Specified condition P1-1 - P1-2 Shift lever Is moved to R position. Below 1 ohms P1-1 - P1-2 Shift lever Is moved to any position except R. 10 kohms or higher NG: REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY OK: REPAIR OR REPLACE HARNESS OR CONNECTOR

This is the display signal circuit of the television camera assembly.

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1. CHECK HARNESS AND CONNECTOR (RADIO AND NAVIGATION ASSEMBLY - TELEVISION CAMERA ASSEMBLY) Disconnect the R26 connector from the radio and navigation assembly. Disconnect the T11 connector from the television camera assembly. Measure the resistance according to the value(s) in the table below. Standard resistance RADIO AND NAVIGATION ASSEMBLY - TELEVISION CAMERA ASSEMBLY Tester connection (Terminal No.) Condition Specified condition CB+ (T11-1) - CA+ (R26-24) Always Below 1 ohms CGND (T11-2) - CGND (R26-21) Always Below 1 ohms CV+ (T11-4) - V+ (R26-22) Always Below 1 ohms CV- (T11-3) - V- (R26-23) Always Below 1 ohms CB+ (T11-1) - Body ground Always 10 kohms or higher CGND (T11-2) - Body ground Always 10 kohms or higher CV+ (T11-4) - Body ground Always 10 kohms or higher CV- (T11-3) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
2. INSPECT RADIO AND NAVIGATION ASSEMBLY Reconnect the radio and navigation assembly R26 connector. Measure the voltage according to the value(s) in the table below. Standard voltage RADIO AND NAVIGATION ASSEMBLY Tester connection Condition Specified condition CB+ (T11-1) - CGND (T11-2) Ignition switch ON Shift lever R position Approx. 6 V NG: REPLACE RADIO AND NAVIGATION ASSEMBLY OK: Go to next step.
3. INSPECT TELEVISION CAMERA ASSEMBLY Reconnect the radio and navigation assembly R26 connector and the television camera assembly T11 connector. Check the waveform of the television camera assembly using an oscilloscope. Measurement terminal: CV+ - CV- Measurement setting: 0.2 V/DIV, 0.2 μs/DIV Condition: Ignition switch ON, Shift lever in R range OK: Pulses as shown in the illustration. NG: REPLACE TELEVISION CAMERA ASSEMBLY OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

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1. REMOVE BACK DOOR TRIM BOARD
2. REMOVE BACK DOOR SERVICE HOLE COVER LH
3. REMOVE TELEVISION CAMERA ASSEMBLY Disconnect the connector and remove the connector clamp. Remove the 2 screws and the television camera assembly.