Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: Terminals Of Ecu

TERMINALS OF ECU

REAR TELEVISION CAMERA ASSEMBLY

(a) Disconnect the Z11 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

Z11-6 (CB+) - Body ground

B - Body ground

Power source

Engine switch on (ACC)

5.5 to 7.05 V

(c) Reconnect the Z11 rear television camera assembly connector.

(d) Measure the resistance and waveform according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

Z11-2 (CV-) - Body ground

R - Shielded

Ground

Always

Below 1 Ω

Z11-3 (CV+) - Z11-2 (CV-)

W - R

Video signal

Engine switch on (IG)

Shift lever in R

Camera lens not covered, displaying image

Pulse generation

(Refer to waveform 1)

Engine switch on (IG)

Shift lever in R

Camera lens covered, blacking out screen

Pulse generation

(Refer to waveform 2)

Z11-5 (CGND) - Body ground

G - Body ground

Shield ground

Always

Below 1 Ω

(e) Reference (Waveform):

*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

HINT:

A waterproof connector is used for the rear television camera assembly. Therefore, inspect the waveform at the radio receiver assembly with the connector connected.

(1) Waveform 1

Item

Content

Terminal No. (Symbol)

Z11-3 (CV+) - Z11-2 (CV-)

Tool Setting

200 mV/DIV., 50 μs./DIV.

Condition

Engine switch on (IG), shift lever in R, camera lens is not covered, displaying an image

HINT:

The video waveform changes according to the image sent by the rear television camera assembly.

(2) Waveform 2

Item

Content

Terminal No. (Symbol)

Z11-3 (CV+) - Z11-2 (CV-)

Tool Setting

200 mV/DIV., 50 μs./DIV.

Condition

Engine switch on (IG), shift lever in R, camera lens is covered, blacking out screen

HINT:

The video waveform changes according to the image sent by the rear television camera assembly.

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