TERMINALS OF ECU
1. REAR TELEVISION CAMERA ASSEMBLY
(a) Disconnect the R21 rear television camera assembly connector.
(b) Measure the voltage on the wire harness side connector according to the value(s) in the table below.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
R21-6 (CB+) - Body ground |
B - Body ground |
Power source |
Ignition switch ACC |
5.5 to 7.05 V |
If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the R21 rear television camera assembly connector.
(d) Measure the voltage and check for pulses at each terminal of the connector.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
R21-3 (CV+) - R21-2 (CV-) |
R - W |
Video signal |
Ignition switch ON Shift lever in R Camera lens not covered, displaying an image |
Pulse generation (Refer to waveform 1) |
Ignition switch ON Shift lever in R Camera lens covered, blacking out screen |
Pulse generation (Refer to waveform 2) |
|||
R21-5 (CGND) - Body ground |
W-B - Body ground |
Shield ground |
Always |
Below 1 V |
HINT:
A waterproof connector is used for the rear television camera assembly. Therefore, inspect the waveform at the navigation receiver assembly*1 or radio and display receiver assembly*2 with the connector connected.
If the result is not as specified, the rear television camera assembly may be malfunctioning.
(e) Reference (Oscilloscope waveform):
HINT:
A waterproof connector is used for the rear television camera assembly. Therefore, inspect the waveform at the navigation receiver assembly*1 or radio and display receiver assembly*2 with the connector connected.
(1) Waveform 1 (camera lens is not covered, displaying an image)
Item |
Content |
---|---|
Measurement terminal |
R21-3 (CV+) - R21-2 (CV-) |
Measurement setting |
200 mV/DIV., 50 μs./DIV. |
Condition |
Ignition switch ON, shift lever in R |
HINT:
(2) Waveform 2 (camera lens is covered, blacking out the screen)
Item |
Content |
---|---|
Measurement terminal |
R21-3 (CV+) - R21-2 (CV-) |
Measurement setting |
200 mV/DIV., 50 μs./DIV. |
Condition |
Ignition switch ON, shift lever in R |
HINT:
*a |
Waveform 1 (camera lens is not covered, displaying an image) |
*b |
Waveform 2 (camera lens is covered, blacking out the screen) |
*c |
Synchronization Signal |
*d |
Video Waveform |
2. NAVIGATION RECEIVER ASSEMBLY (for Navigation System) (See page )
3. RADIO AND DISPLAY RECEIVER ASSEMBLY (for Audio and Visual System) (See page )
Initialization
INITIALIZATION
1. PROCEDURES NECESSARY WHEN BATTERY TERMINAL IS DISCONNECTED/RECONNECTED
Necessary Procedure
Effect / Inoperative Function When Necessary Procedures are not Performed
See Page
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Inspection
INSPECTION
PROCEDURE
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(a) Apply battery voltage and check the seatback heater.
OK:
Measurement Connection
Condition
Specified Condition
...