Inspection Procedure

WARNING: This page is about a different car, the 2004 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: 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
1. Connect the hand-held tester to DLC3.
2. Turn the ignition switch ON and push the hand-held tester main switch ON.
3. Select the item below in the ACTIVE TEST and then check that the relay operates.
BODY NO.1:

Fig 1: DRL Relay Test Details Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )
2. NG: Go to next step.

INSPECT HEADLAMP DAY DIM LIGHT RELAY

Fig 2: Inspecting Head Lamp Day Dim Relay Continuity

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Inspect headlamp day dim relay continuity.

Standard:

TESTER CONNECTION SPECIFIED CONDITION

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

NG: REPLACE HEADLAMP DAY DIM LIGHT RELAY
OK: Go to next step.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY

Measure voltage between the terminal as shown in the chart below.

Standard:

TESTER CONNECTION SPECIFIED VOLTAGE

Tester connection	Condition	Specified voltage (V)
1C-23 - Body ground	Headlamp dimmer switch LOW --> FLASH	Below 1 V --> 10 to 14 V

Fig 3: Tester Connection Specified Voltage Table

OK: REPAIR OR REPLACE HARNESS OR CONNECTOR
NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )