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.

READ VALUE OF 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 items below in the DATA LIST, and read the displays on the hand-held tester.
BODY NO.1:

Fig 1: Measurement Item/Display Normal Condition 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 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

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

Standard:

TESTER CONNECTION SPECIFIED VOLTAGE

Tester connection	Condition	Specified voltage
1N-2 - Body ground	Headlamp dimmer switch LOW --> HIGH	10 to 14 V --> Below 1 V
B6-15 - Body ground	Headlamp dimmer switch LOW --> FLASH	10 to 14 V --> Below 1 V
B6-16 - Body ground	Light control switch OFF --> AUTO	10 to 14 V --> Below 1 V
B6-17 - Body ground	Light control switch OFF --> TAIL	10 to 14 V --> Below 1 V
B6-22 - Body ground	Fog lamp switch OFF --> ON	10 to 14 V --> Below 1 V
B6-23 - Body ground	Light control switch OFF --> HEAD	10 to 14 V --> Below 1 V

Fig 2: Identifying Instrument Panel Junction Block Assy Front Side Connectors

Fig 3: Identifying Instrument Panel Junction Block Assy Back Side Connectors

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