Last Modified: 7-3-2017 6.8:8.0.40 Doc ID: RM000001ABN001X
Model Year Start: 2007 Model: LX470 Prod Date Range: [08/2006 -           ]
Title: PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: Night View Display Cover does not Open with Night View Switch and Night View Indicator Light Turns on Only Momentarily; 2007 MY LX470 [08/2006 -        ]

Night View Display Cover does not Open with Night View Switch and Night View Indicator Light Turns on Only Momentarily

DESCRIPTION

The lighting system and the display cover limit switches need to operate normally for the night view system to function.

The display cover assembly of the night view display has a limit switch built-in, which detects its open-close condition.

NOTICE:

Do not apply grease to the sliding parts of the display cover.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

CHECK HEADLIGHT FUNCTION

(a) Turn the headlight ON.

(b) Verify that all headlight functions are normal.

OK:

Headlight function is correct.

NG

GO TO LIGHTING SYSTEM

OK

2.

CHECK NIGHT VIEW DISPLAY (MS1, MS2 VOLTAGE)

(a) Remove the combination meter assembly.

(b) Turn the ignition switch ON.

(c) Measure the voltage between terminals MS1 (close limit signal of display cover) and MS2 (open limit signal of display cover) of the night view display connector "J" and body ground.

(Terminals of ECU: 2007 MY LX470 [08/2006 -        ]; PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: TERMINALS OF ECU )

Standard voltage:

Below 1 V (both limit signals ON)
OK

REPLACE DISPLAY COVER ASSEMBLY

NG

3.

INSPECT DISPLAY COVER ASSEMBLY

(a) Disconnect the connector "J".

(b) Measure the resistance between terminals MD1 (power source of display cover motor) and MD2 (power source of display cover motor) of the night view display connector "J".

(Terminals of ECU: 2007 MY LX470 [08/2006 -        ]; PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: TERMINALS OF ECU )

Standard resistance:

20 to 60 Ω
NG

REPLACE DISPLAY COVER ASSEMBLY

OK

4.

INSPECT DISPLAY COVER ASSEMBLY

(a) Disconnect the connector "J".

(b) Measure the resistance between terminal MD1 (power source of display cover motor) of the night view display connector "J" and body ground.

(Terminals of ECU: 2007 MY LX470 [08/2006 -        ]; PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: TERMINALS OF ECU )

Standard resistance:

10 kΩ or higher
NG

REPLACE DISPLAY COVER ASSEMBLY

OK

5.

CHECK NIGHT VIEW DISPLAY (MD1 VOLTAGE)

(a) Reconnect the connector "J".

(b) Turn the ignition switch ON.

(c) Switch to inspection mode 2007 MY LX470 [08/2006 -        ]; PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: OPERATION CHECK .

(d) Measure the voltage between terminal MD1 (power source of display cover motor) of the night view display connector "J" and body ground.

(Terminals of ECU: 2007 MY LX470 [08/2006 -        ]; PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: TERMINALS OF ECU )

Standard voltage:

Above 9 V
OK

REPLACE DISPLAY COVER ASSEMBLY

NG

6.

CHECK NIGHT VIEW ECU (MD1 VOLTAGE)

(a) Turn the ignition switch ON.

(b) Switch to inspection mode 2007 MY LX470 [08/2006 -        ]; PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: OPERATION CHECK .

(c) Measure the voltage between terminal MD1 (power source of display cover motor) of the night view ECU connector "C" and body ground.

(Terminals of ECU: 2007 MY LX470 [08/2006 -        ]; PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: TERMINALS OF ECU )

Standard voltage:

Above 9 V
OK

REPLACE NIGHT VIEW DISPLAY

NG

7.

CHECK NIGHT VIEW ECU (HERLY VOLTAGE)

(a) Turn the ignition switch OFF.

(b) Turn the headlight ON.

(c) Measure the voltage between terminal HERLY of the night view ECU connector "N6" and body ground.

(Terminals of ECU: 2007 MY LX470 [08/2006 -        ]; PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: TERMINALS OF ECU )

Standard voltage:

Condition

Specified Condition

Light control switch:

head position or auto position (headlight ON)

Below 1 V

Light control switch: except head position or auto position

(headlight OFF)

10 to 14 V
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR (NIGHT VIEW ECU - J30 CONNECTOR OF JUNCTION CONNECTOR)

OK

8.

CHECK NIGHT VIEW ECU (HU VOLTAGE)

(a) Turn the ignition switch ON.

(b) Turn the headlight ON.

(c) Measure the voltage between terminal HU of the night view ECU connector "N6" and body ground.

(Terminals of ECU: 2007 MY LX470 [08/2006 -        ]; PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: TERMINALS OF ECU )

Standard voltage:

Condition

Specified Condition

Headlight dimmer switch:

low position

10 to 14 V

Headlight dimmer switch:

high or flash position

Below 1 V
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR (NIGHT VIEW ECU - J30 CONNECTOR OF JUNCTION CONNECTOR)

OK

9.

CHECK NIGHT VIEW ECU (HF VOLTAGE)

(a) Turn the ignition switch ON.

(b) Turn the headlight ON.

(c) Measure the voltage between terminal HF of the night view ECU connector "N6" and body ground.

(Terminals of ECU: 2007 MY LX470 [08/2006 -        ]; PARK ASSIST / MONITORING: NIGHT VIEW SYSTEM: TERMINALS OF ECU )

Standard voltage:

Condition

Specified Condition

Headlight dimmer switch:

flash position

Below 1 V

Headlight dimmer switch:

low or high position

10 to 14 V
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR (NIGHT VIEW ECU - J30 CONNECTOR OF JUNCTION CONNECTOR)

OK

REPLACE NIGHT VIEW ECU