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

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:

TAIL LIGHT TEST DETAILS

Item	Test Details	Diagnostic Note
TAIL LIGH	Turn Tail light relay ON/OFF	-

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )
NG: Go to next step.

INSPECT TAIL LAMP RELAY

Fig 1: Inspecting Tail Lamp Relay Continuity Table

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Inspect tail lamp relay continuity.

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Condition	Tester connection	Specified condition
Always	1 - 2	Continuity
Always	3 - 4	Continuity
Always	3 - 5	No continuity
Apply B+ between the terminal 1 and 2	3 - 5	Continuity

NG: REPLACE TAIL LAMP RELAY
OK: Go to next step.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY

Fig 2: Identifying Instrument Panel Junction Block Assy Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure voltage between the terminal 1A-1 and body ground.

Standard:

TESTER CONNECTION SPECIFIED VOLTAGE

Tester connection	Specified voltage
1A-1 - Body ground	10 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY

Measure voltage between the each of terminals as shown in the chart below.

Standard:

TESTER CONNECTION SPECIFIED VOLTAGE

Tester connection	Condition	Specified Voltage
1L-16 - 1C-4	Light control switch OFF --> TAIL	Below 1 V --> 10 to 14V
1L-16 - 1C-5	Light control switch OFF --> TAIL	Below 1 V --> 10 to 14V
1L-16 - 1C-13	Light control switch OFF --> TAIL	Below 1 V --> 10 to 14V
1L-16 - 1C-28	Light control switch OFF --> TAIL	Below 1 V --> 10 to 14 V
1L-16 - 1L-3	Light control switch OFF --> TAIL	Below 1 V --> 10 to 14V
1L-16 - 1P-14	Light control switch OFF --> TAIL	Below 1 V --> 10 to 14V

Fig 3: Identifying Instrument Panel Junction Block Assy Connectors

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