Toyota Prius: Headlight Dimmer Switch

Toyota Prius (XW60) 2023-2025 Service Manual / Vehicle Exterior / Lighting (ext) / Headlight Dimmer Switch

Removal
Inspection
Installation

Removal

REMOVAL

CAUTION / NOTICE / HINT

COMPONENTS (REMOVAL)

Procedure		Part Name Code
1	STEERING WHEEL POSITION	-		-	-
2	NO. 3 STEERING WHEEL LOWER COVER	45187		-	-
3	NO. 2 STEERING WHEEL LOWER COVER	45186		-	-
4	LOWER STEERING COLUMN COVER	45287		-	-
5	UPPER STEERING COLUMN COVER	45286B	-	-	-
6	TURN SIGNAL SWITCH	84329		-	-

PROCEDURE

1. STEERING WHEEL POSITION

Click here

2. REMOVE NO. 3 STEERING WHEEL LOWER COVER

Click here

3. REMOVE NO. 2 STEERING WHEEL LOWER COVER

(a) Use the same procedure as for the No. 3 steering wheel lower cover.

4. REMOVE LOWER STEERING COLUMN COVER

Click here

5. REMOVE UPPER STEERING COLUMN COVER

Click here

6. REMOVE TURN SIGNAL SWITCH

Remove in this Direction

(1) Remove the 2 screws.

(2) Using a screwdriver with its tip wrapped with protective tape, disengage the claw and remove the turn signal switch as shown in the illustration.

NOTICE:

If the claw is pulled with excessive force, it may break.

Inspection

INSPECTION

PROCEDURE

1. INSPECT TURN SIGNAL SWITCH

(a) Resistance Check

(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Light Control Switch

Click Location & Routing(z9) Click Connector(z9)

Tester Connection	Condition	Specified Condition	Result
1: w/ Light Control Switch DRL OFF Position 2: w/ Light Control Switch OFF Position
z9-2 (L_OFF) - z9-12 (EL)	Light control switch in DRL OFF position*1	Below 1 Ω	Ω
z9-2 (L_OFF) - z9-12 (EL)	Light control switch in OFF position*2	Below 1 Ω	Ω
z9-10 (A) - z9-12 (EL)	Light control switch in AUTO position	Below 1 Ω	Ω
z9-14 (T) - z9-12 (EL)	Light control switch in tail position	Below 1 Ω	Ω
z9-5 (H) - z9-12 (EL)	Light control switch in head position	Below 1 Ω	Ω

Dimmer Passing Switch

Click Location & Routing(z9) Click Connector(z9)

Tester Connection	Condition	Specified Condition	Result
z9-6 (HF) - z9-12 (EL)	Dimmer switch in high flash position	Below 1 Ω	Ω
z9-1 (HU) - z9-12 (EL)	Dimmer switch in high position	Below 1 Ω	Ω

Turn Signal Switch

Click Location & Routing(z9) Click Connector(z9)

Tester Connection	Condition	Specified Condition	Result
z9-9 (TR) - z9-12 (EL)	Turn signal switch in neutral position	10 kΩ or higher	kΩ
z9-3 (TL) - z9-12 (EL)	Turn signal switch in neutral position	10 kΩ or higher	kΩ
z9-9 (TR) - z9-12 (EL)	Turn signal switch in right turn position	Below 1 Ω	Ω
z9-9 (TR) - z9-12 (EL)	Turn signal switch in full right turn position	Below 1 Ω	Ω
z9-9 (TR) - z9-11 (CR)	Turn signal switch in full right turn position	Below 1 Ω	Ω
z9-11 (CR) - z9-12 (EL)	Turn signal switch in full right turn position	Below 1 Ω	Ω
z9-3 (TL) - z9-12 (EL)	Turn signal switch in left turn position	Below 1 Ω	Ω
z9-3 (TL) - z9-12 (EL)	Turn signal switch in full left turn position	Below 1 Ω	Ω
z9-3 (TL) - z9-11 (CR)	Turn signal switch in full left turn position	Below 1 Ω	Ω
z9-11 (CR) - z9-12 (EL)	Turn signal switch in full left turn position	Below 1 Ω	Ω

If the result is not as specified, replace the turn signal switch.

HINT:

The left turn or right turn condition indicates a condition in which the turn signal switch will return to the neutral position after releasing your hand from the turn signal switch (turn signal switch is operated approximately 6.3°).
The full left turn or full right turn condition indicates a condition in which the turn signal switch will not return to the neutral position after releasing your hand from the turn signal switch (turn signal switch is operated 10.5°).

*a	Component without harness connected (Turn Signal Switch)

Installation

INSTALLATION

CAUTION / NOTICE / HINT

COMPONENTS (INSTALLATION)

Procedure		Part Name Code
1	TURN SIGNAL SWITCH	84329	-	-	-
2	UPPER STEERING COLUMN COVER	45286B	-	-	-
3	LOWER STEERING COLUMN COVER	45287		-	-
4	NO. 2 STEERING WHEEL LOWER COVER	45186	-	-	-
5	NO. 3 STEERING WHEEL LOWER COVER	45187	-	-	-