Last Modified: 4-30-2014 6.6 J Doc ID: RM000001ABR000X
Model Year: 2006 Model: LX470 Prod Date Range: [05/2005 -           ]
Title: PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: Entire Image is Black; 2006 MY LX470 [05/2005 -        ]

Entire Image is Black

DESCRIPTION

Black screen occurs by a malfunction of the night view ECU.

Power source of the night view ECU is provided by night view battery ECU.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

CHECK BACK LIGHT CONDITION OF NIGHT VIEW DISPLAY

(a) Turn the ignition switch ON.

(b) Switch to inspection mode 2006 MY LX470 [05/2005 -        ]; PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: OPERATION CHECK .

(c) Check that the back light of the night view display comes on.

OK:

The back light comes on.

NG

GO TO STEP 6

OK

2.

CHECK NIGHT VIEW CAMERA

(a) Remove the over head junction (map light cover).

(b) Disconnect the connector from the night view camera.

(c) Connect SST to the wire harness of the night view camera on the body ground side as shown in the illustration.

SST: 09991-00610

(d) Turn the ignition switch ON.

(e) Switch to inspection mode 2006 MY LX470 [05/2005 -        ]; PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: OPERATION CHECK .

(f) Check the screen of the night view display.

OK:

3 levels of black-white shade intensity displayed.

OK

REPLACE NIGHT VIEW CAMERA

NG

3.

CHECK NIGHT VIEW CAMERA (CB+ VOLTAGE)

(a) Disconnect the SST.

(b) Turn the ignition switch ON.

(c) Swith to inspection mode 2006 MY LX470 [05/2005 -        ]; PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: OPERATION CHECK .

(d) Measure the voltage between terminal CB+ on the vehicle side as shown in the illustration.

Standard voltage:

Above 6 V
NG

GO TO STEP 7

OK

4.

CHECK WIRE HARNESS (OPEN OR SHORT) (NIGHT VIEW CAMERA - NIGHT VIEW ECU)

(a) Remove the combination meter assembly.

(b) Disconnect the connector "N6" from the night view ECU.

(c) Measure the resistance between terminal NTSC of connector "N6" and CV+ connector "N9".

Standard resistance:

Below 1 Ω

(d) Measure the resistance between terminal NTSC of connector "N6" and body ground.

Standard resistance:

10 kΩor higher

Result

Result

Proceed to

OK

<Reference>

A

(when using oscilloscope)

B*

(when not using oscilloscope)

NG

C

HINT:

*: If the symptom still occurs after replacing night view, replace the Night View Display.

B

REPLACE NIGHT VIEW ECU

C

REPAIR OR REPLACE HARNESS AND CONNECTOR

A

5.

CHECK NIGHT VIEW ECU (VG VOLTAGE)

(a) Connect the connector of the night view camera.

(b) Turn the ignition switch ON.

(c) Switch to inspection mode 2006 MY LX470 [05/2005 -        ]; PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: OPERATION CHECK .

(d) Using an oscilloscope, check the output waveform between terminal VG of the night view ECU connector "C" and body ground.

(Terminals of ECU: 2006 MY LX470 [05/2005 -        ]; PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: TERMINALS OF ECU )

OK:

The output waveform is as shown in the illustration.

(Reference) oscilloscope condition

Item

Contents

Tool setting

200 mV/DIV., 10 μsec./DIV.

Vehicle condition

When night view system starts up
NG

REPLACE NIGHT VIEW ECU

OK

REPLACE NIGHT VIEW DISPLAY

6.

CHECK NIGHT VIEW ECU (DIM, C/C CUT IG VOLTAGE)

(a) Remove the combination meter assembly.

(b) Turn the ignition switch ON.

(c) Measure the voltage between terminals DIM, C/C CUT and IG of the night view ECU connector "C" and body ground.

(Terminals of ECU: 2006 MY LX470 [05/2005 -        ]; PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: TERMINALS OF ECU )

Standard voltage:

DIM: Approximately 5 V

C/C CUT: Approximately 5 V

IG: Above 10 V

HINT:

All 3 terminal voltages must meet the standard.
NG

REPLACE NIGHT VIEW ECU

OK

REPLACE NIGHT VIEW DISPLAY

7.

CHECK NIGHT VIEW ECU (6VOUT VOLTAGE)

(a) Disconnect the connector "N9" from the night view camera.

(b) Remove the combination meter assembly.

(c) Turn the ignition switch ON.

(d) Switch to inspection mode 2006 MY LX470 [05/2005 -        ]; PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: OPERATION CHECK .

(e) Measure the voltage between terminal 6VOUT of the night view ECU connector "N6" and body ground.

(Terminals of ECU: 2006 MY LX470 [05/2005 -        ]; PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: TERMINALS OF ECU )

Standard voltage:

5.7 to 6.3 V
OK

REPAIR OR REPLACE HARNESS AND CONNECTOR (NIGHT VIEW ECU - NIGHT VIEW CAMERA)

NG

8.

CHECK NIGHT VIEW ECU (6VIN VOLTAGE)

(a) Turn the ignition switch ON.

(b) Switch to inspection mode 2006 MY LX470 [05/2005 -        ]; PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: OPERATION CHECK .

(c) Measure the voltage between terminal 6VIN of the night view ECU connector "B" and body ground.

(Terminals of ECU: 2006 MY LX470 [05/2005 -        ]; PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: TERMINALS OF ECU )

Standard resistance:

5.7 to 6.3 V
OK

REPLACE NIGHT VIEW ECU

NG

9.

CHECK WIRE HARNESS (NIGHT VIEW BATTERY ECU - NIGHT VIEW ECU)

(a) Remove the wire harness between the night view battery ECU and night view ECU.

(b) Measure the resistance between terminals VGL, VDD, and VGH of connector "D" and those of "B".

(Terminals of ECU: 2006 MY LX470 [05/2005 -        ]; PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: TERMINALS OF ECU ).

Standard resistance:

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

REPLACE NIGHT VIEW BATTERY ECU