Inspection Procedure

WARNING: This page is about a different car, the 2003 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.

Check continuity between terminal NVSW and E1 of Night View Switch.
PREPARATION:

Remove the Night View Switch.

CHECK:

Check continuity between terminal NVSW and E1 of Night View Switch.

OK:
1. Continuity:
2. When press the Night View Switch: Continuity
3. When not press the Night View Switch: No continuity
Fig 1: Identifying Night View Switch Terminal NVSW & E1
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1. NG : Replace Night View Switch.
2. OK : Go to next step
Check voltage between terminal NVSW and body ground of the Night View ECU.
PREPARATION:
1. Remove the combination meter.
2. Turn the ignition switch to ON.
3. Switch to Inspection Mode (See PRE-CHECK ).
CHECK:

Fig 2: Identifying Battery ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure voltage between terminal NVSW and body ground of the Night View ECU with the wire harness.

OK:
1. Voltage:
2. When not pressing the Night View Switch: 5 V
3. When pressing the Night View Switch: 0 V
Fig 3: Identifying Night View ECU Terminal NVSW
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK : Repair or replace wire harness and connector.
2. NG : Check and replace Night View ECU.