Toyota 4Runner: Inspection

Toyota 4Runner Service Manual / Vehicle Exterior / Lighting (ext) / Headlight Dimmer Switch / Inspection

INSPECTION

PROCEDURE

1. INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY

(a) Inspect the light control switch.

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

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
20 (H) - 12 (EL)	Light control switch off	10 kΩ or higher
18 (T) - 12 (EL)
19 (A) - 12 (EL)
19 (A) - 12 (EL)	Light control switch auto	Below 1 Ω
18 (T) - 12 (EL)	Light control switch tail	Below 1 Ω
18 (T) - 12 (EL)	Light control switch head	Below 1 Ω
20 (H) - 12 (EL)	Light control switch head	Below 1 Ω

(b) Inspect the headlight dimmer switch.

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

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
11 (HU) - 12 (EL)	Headlight dimmer switch flash	Below 1 Ω
17 (HF) - 12 (EL)	Headlight dimmer switch flash	Below 1 Ω
11 (HU) - 12 (EL)	Headlight dimmer switch hi beam	Below 1 Ω

HINT:

Perform the flash and high beam inspection with the light control switch set to head.

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

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
13 (TR) - 12 (EL)	Turn signal switch right turn	Below 1 Ω
13 (TR) - 12 (EL)	Turn signal switch right lane change	Below 1 Ω
13 (TR) - 12 (EL)	Turn signal switch neutral	10 kΩ or higher
15 (TL) - 12 (EL)	Turn signal switch neutral	10 kΩ or higher
15 (TL) - 12 (EL)	Turn signal switch left lane change	Below 1 Ω
15 (TL) - 12 (EL)	Turn signal switch left turn	Below 1 Ω

(d) Inspect the fog light switch.

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

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
4 (BFG) - 3 (LFG)	Fog light switch off	10 kΩ or higher
4 (BFG) - 3 (LFG)	Front fog light switch on	Below 1 Ω

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

Text in Illustration

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

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