Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Terminals Of Ecu

4D-3 - Body ground

LA - Body ground

Ground

Always

Below 1 Ω

4F-1 - Body ground

LG - Body ground

Auxiliary battery power supply

Power switch off

11 to 14 V

4K-1 - Body ground

W - Body ground

Auxiliary battery power supply

Power switch off

11 to 14 V

4F-19 - Body ground

BE - Body ground

BKUP LP relay drive output

Power switch off, reverse (R) not selected

Below 1 V

Power switch on (IG), reverse (R) selected

11 to 14 V

4F-28 - Body ground

GR - Body ground

Daytime running light system drive output

Daytime running light system operating

Below 1 V

Daytime running light system not operating

11 to 14 V

4F-31 - Body ground

V - Body ground

H-LP LH relay drive output

Light control switch in head position

Below 1 V

Taillights off

11 to 14 V

4F-32 - Body ground

LA-B - Body ground

Parking lights and front side marker lights drive output

Taillights on

11 to 14 V

Taillights off

Below 1 V

4H-10 - Body ground

LG - Body ground

Back-up lights drive output

Power switch off, reverse (R) not selected

Below 1 V

Power switch on (IG), reverse (R) selected

11 to 14 V

4H-30 - Body ground

LA-B - Body ground

Taillights, rear side marker lights and license plate lights drive output

Taillights on

11 to 14 V

Taillights off

Below 1 V

G32-19 (GND2) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

G32-23 (AHID) - Body ground

BE - Body ground

Auto high beam switch indicator drive output

Power switch on (IG), auto high beam switch on

Below 1 V

Power switch on (IG), auto high beam switch off

11 to 14 V

G33-12 (HRY2) - Body ground

BE - Body ground

H-LP RH relay drive output

Light control switch in head position

Below 1 V

Taillights off

11 to 14 V

G33-13 (DIM) - Body ground

G - Body ground

High beam headlight drive output

Light control switch in head position and dimmer switch in high or high flash position

Below 1 V

Dimmer switch not in high or high flash position

11 to 14 V

G33-16 (HEAD) - Body ground

LG - Body ground

Light control switch head position input

Light control switch in head position

Below 1 V

Light control switch not in head position

11 to 14 V

G33-23 (CLTB) - G33-25 (CLTE)

BE - GR

Automatic light control sensor power supply output

Power switch off

Below 1 V

Power switch on (IG)

11 to 14 V

G33-24 (CLTS) - Body ground

R - Body ground

Automatic light control sensor signal input

Power switch off

Below 1 V

Power switch on (IG)

Pulse generation

(See waveform 1)

G33-26 (AHBI) - Body ground

B - Body ground

Auto high beam switch signal input

Auto high beam switch on

Below 1 V

Auto high beam switch off

11 to 14 V

Tester Connection

G33-24 (CLTS) - Body ground

Tool setting

2 V/DIV., 10 ms./DIV.

Condition

Power switch on (IG)