Toyota Tacoma (2015-2018) Service Manual: Inspection

Toyota Tacoma (2015-2018) Service Manual / Lighting / Headlight Dimmer Switch / Inspection

INSPECTION

PROCEDURE

1. INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY

(a) Check the resistance.

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

Text in Illustration

*a	Component without harness connected (Headlight Dimmer Switch Assembly)

Standard Resistance:

Light Control Switch (w/o DRL OFF function)

Tester Connection	Switch Condition	Specified Condition
18 (T) - 15 (EL)	Light control switch OFF	10 kΩ or higher
19 (H) - 15 (EL)	Light control switch OFF	10 kΩ or higher
18 (T) - 15 (EL)	Light control switch in tail position	Below 1 Ω
18 (T) - 15 (EL)	Light control switch in head position	Below 1 Ω
19 (H) - 15 (EL)	Light control switch in head position	Below 1 Ω

Light Control Switch (w/ DRL OFF function)

Tester Connection	Switch Condition	Specified Condition
18 (T) - 15 (EL)	Light control switch DRL-OFF	10 kΩ or higher
19 (H) - 15 (EL)		10 kΩ or higher
20 (A) - 15 (EL)		10 kΩ or higher
18 (T) - 15 (EL)	Light control switch in tail position	Below 1 Ω
18 (T) - 15 (EL)	Light control switch in head position	Below 1 Ω
19 (H) - 15 (EL)	Light control switch in head position	Below 1 Ω
20 (A) - 15 (EL)	Light control switch in AUTO position	Below 1 Ω
20 (A) - 15 (EL)	Light control switch in DRL position	Below 1 Ω

Dimmer Switch

Tester Connection	Switch Condition	Specified Condition
16 (HL) - 15 (EL)	Dimmer switch in low position	Below 1 Ω
14 (HU) - 15 (EL)	Dimmer switch in low position	10 kΩ or higher
14 (HU) - 15 (EL)	Dimmer switch in high position	Below 1 Ω
14 (HU) - 15 (EL)	Dimmer switch in high flash position	Below 1 Ω
17 (HF) - 15 (EL)	Dimmer switch in high flash position	Below 1 Ω

Turn Signal Switch

Tester Connection	Switch Condition	Specified Condition
12 (TR) - 15 (EL)	Neutral	10 kΩ or higher
11 (TL) - 15 (EL)		10 kΩ or higher
13 (CR) - 15 (EL)		10 kΩ or higher
12 (TR) - 15 (EL)	Right turn	Below 1 Ω
13 (CR) - 15 (EL)	Right turn fully	Below 1 Ω
11 (TL) - 15 (EL)	Left turn	Below 1 Ω
13 (CR) - 15 (EL)	Left turn fully	Below 1 Ω

Fog Light Switch

Tester Connection	Switch Condition	Specified Condition
9 (BFG) - 8 (LFG)	Fog light switch off	10 kΩ or higher
9 (BFG) - 8 (LFG)	Fog light switch in front position	Below 1 Ω

If the result is not as specified, replace the headlight dimmer switch assembly.

Removal

REMOVAL PROCEDURE 1. REMOVE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY (See page ) 2. REMOVE WINDSHIELD WIPER SWITCH ASSEMBLY 3. REMOVE HEADLIGHT DIMMER SWITCH ASSEMBLY (a) Disconnect ...

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