Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FUSE (H-LP RH/H-LP LO RH, H-LP LH/H-LP LO LH)
1. Remove the H-LP RH/H-LP LO RH and H-LP LH/H-LP LO LH fuses from the engine room relay block.
2. Measure the resistance.
  Standard resistance: Below 1 Ω
3. Reinstall the H-LP RH/H-LP LO RH and H-LP LH/H-LP LO LH fuses.
NG: REPLACE FUSE

OK: GO TO NEXT STEP

INSPECT BULB (HEADLIGHT BULB)

Disconnect the B4 and B6 headlight connectors.

Apply battery voltage to the terminals and check that the headlight illuminates.

Standard

TERMINALS VOLTAGES CHART

Measurement Condition	Standard
Positive battery - Terminal 1 Negative battery - Terminal 3	Headlight Illuminates (HI-Beam)
Positive battery - Terminal 2 Negative battery - Terminal 3	Headlight Illuminates (LO-Beam)

Reconnect the headlight connectors.

Fig 1: Identifying Terminals Of Headlight Bulb Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE BULB

OK: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (FUSE - HEADLIGHT)

Disconnect the B4 and B6 headlight bulb connectors.

Measure the voltage.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
B4-3 - Body ground	Always	11 to 14 V
B6-3 - Body ground	Always	11 to 14 V

Reconnect the headlight bulb connectors.

Fig 2: Identifying Terminals Of B4 And B6 Headlight Bulb Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP

INSPECT HEADLIGHT DIMMER SWITCH

Remove the headlight dimmer switch.

Inspect the light control switch.

Measure the resistance.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
10(T1)-13(B1)	TAIL	Below 1 Ω
10(T1)-13(B1)	HEAD	Below 1 Ω
10(T1)-13(B1)	OFF	10 kΩ or higher
11 (ED)-12 (RF)	HEAD	Below 1 Ω
11 (ED) -12 (RF)	OFF	10 kΩ or higher

Fig 3: Identifying Terminals Of Headlight Dimmer Switch Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Inspect the headlight dimmer switch

Measure the resistance.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
9(HU)-11 (ED)	FLASH	Below 1 Ω
8(HL)-11(ED)	LOW BEAM	Below 1 Ω
9 (HU) -11 (ED)	HI BEAM	Below 1 Ω

Reinstall the headlight dimmer switch.

NG: REPLACE HEADLIGHT DIMMER SWITCH

OK: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (HEADLIGHT - HEADLIGHT DIMMER SWITCH)

Disconnect the D4 headlight dimmer switch connector.

Measure the voltage.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
D4-8 (HL) - Body ground	Always	11 to 14 V
D4-9 (HU) - Body ground	Always	11 to 14 V

Reconnect the headlight dimmer switch connector.

Fig 4: Identifying Terminals Of D4 Headlight Dimmer Switch Connector

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: ]REPAIR OR REPLACE HARNESS OR CONNECTOR (HEADLIGHT DIMMER SWITCH - BODY GROUND)