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.

PERFORM ACTIVE TEST USING 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 item below in the ACTIVE TEST and then check that the relay operates.

BODY NO.1:

DIAGNOSIS PROCEDURE (BODY NO. 1)

Item	Test Details	Diagnostic Note
HEAD LIGHT	Turn Headlight relay ON/OFF	-

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

INSPECT HEADLAMP RELAY

Inspect headlamp relay continuity.

Standard:

HEADLAMP RELAY

Condition	Tester connection	Specified condition
Always	1 - 2	Continuity
Always	3 - 5	No continuity
Apply B+ between the terminal 1 and 2	3 - 5	Continuity

Fig 1: Inspecting Headlamp Relay Continuity

NG: REPLACE HEADLAMP RELAY
OK: GO TO NEXT STEP

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY
1. Measure voltage between the terminal as shown in Fig 2 .
  Standard:
  
  Fig 2: Instrument Panel Junction Block Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 3: Identifying Instrument Panel Junction Block Assy
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. OK: REPAIR OR REPLACE HARNESS OR CONNECTOR