Inspection Procedure

WARNING: This page is about a different car, the 2005 Lexus RX 330. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS AND CONNECTOR (TELEVISION CAMERA ECU - MULTI-DISPLAY)

Disconnect the television camera ECU connector T16 and multi-display connector M4.

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

Standard:

TELEVISION CAMERA ECU CONNECTOR AND MULTI-DISPLAY CONNECTOR TERMINALS RESISTANCE

Tester connection	Condition	Specified condition
R - R	Always	Below 1 Ω
G - G	Always	Below 1 Ω
B - B	Always	Below 1 Ω
SYNC - SYNC	Always	Below 1 Ω
VR - VR	Always	Below 1 Ω
R - Body ground	Always	10 kΩ or higher
G - Body ground	Always	10 kΩ or higher
B - Body ground	Always	10 kΩ or higher
SYNC - Body ground	Always	10 kΩ or higher
VR - Body ground	Always	10 kΩ or higher

Fig 1: Disconnecting Television Camera ECU Connector T16

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Disconnecting Multi-Display Connector M4

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step.

INSPECT TELEVISION CAMERA ECU (OUTPUT SIGNAL)

Reconnect the television camera ECU connector T16.

Measure the waveform according to the table below.

Standard:

TESTER CONNECTION AND SPECIFIED CONDITION

Tester connection	Condition	Specified condition
R - Body ground	Navigation map is switched	A waveform synchronized with display signals is output
G - Body ground	Navigation map is switched	A waveform synchronized with display signals is output
B - Body ground	Navigation map is switched	A waveform synchronized with display signals is output
SYNC - Body ground	Navigation display is ON	A waveform synchronized with display signals is output

Fig 3: Disconnecting Multi-Display Connector M4

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE TELEVISION CAMERA ECU (SEE TELEVISION CAMERA ECU )
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

HINT:

The waveform pattern may differ from those shown in the illustrations below due to differences in oscilloscope setting. A normal television camera ECU operating condition can be determined if any waveform is output.

Oscilloscope wave

Terminal: SYNC-Body ground

Setting: 500 mV/DIV 10 mus/DIV

Condition: Navigation display is on.

Fig 4: Oscilloscope Waveform Graph (1 Of 2)

Oscilloscope wave

Terminal: R, G, B-Body ground

Setting: 200 mV/DIV 10 mus/DIV

Condition: Navigation map is switched.

Fig 5: Oscilloscope Waveform Graph (2 Of 2)