Inspection Procedure

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

HINT:

Start the inspection from step 1 in the case of using the hand-held tester, and start from step 2 in the case of not using the hand-held tester.

READ VALUE OF HAND-HELD TESTER

Connect the hand-held tester to DLC3.
Turn the ignition switch ON and push the hand-held tester main switch ON.
Select the items below in the DATA LIST, and read the displays on the hand-held tester.

BODY NO.1:

DIAGNOSIS PROCEDURE (BODY NO. 1)

Item	Measurement Item/Display (Range)	Normal Condition	Diagnostic Note
DIMMER SW	Headlight dimmer SW signal/ON or OFF	ON: Headlight dimmer switch is in HI or FLASH position OFF: Headlight dimmer switch is in LO position	-
HIGH FLASHER SW	Headlight dimmer SW signal/ON or OFF	ON: Headlight dimmer switch is in FLASH position OFF: Headlight dimmer switch is in except FLASH position	-
F FOG LIGHT SW	Front fog light SW signal/ON or OFF	ON: Front fog light switch is in ON position when headlight dimmer switch is LOW OFF: Front fog light switch is in OFF position	-
AUTO LIGHT SW	Auto light SW signal/ ON or OFF	ON: Headlight dimmer switch is in AUTO position OFF: Headlight dimmer switch is in except AUTO position	-
HEAD LIGHT SW	Head light control SW signal/ON or OFF	ON: Light control switch is in HEAD position OFF: Light control switch is in except HEAD position	-
TAIL LIGHT SW	Taillight SW signal/ ON or OFF	ON: Light control switch is in TAIL or HEAD position OFF: Light control switch is in OFF position	-

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG: GO TO NEXT STEP

INSPECT HEADLAMP DIMMER SWITCH ASSY
1. Inspect headlamp dimmer switch assy (See INSPECTION ).
1. NG: REPLACE HEADLAMP DIMMER SWITCH ASSY
2. OK: GO TO NEXT STEP
INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY
1. Measure voltage between the each of terminals as shown in Fig 1 .
  Standard:
  
  Fig 1: Instrument Panel Junction Block Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Identifying Instrument Panel Junction Block Assy (Front Side)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Identifying Instrument Panel Junction Block Assy (Back Side)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE