Lost Communication with Automatic High Beam Sensor (B2432)

The DTC is stored when the AFS ECU (headlight swivel ECU assembly) detects malfunctions in the LIN communication system.

1. CHECK FOR DTC

(a) Clear the DTCs (See page ).

(b) Check for DTCs (See page ).

OK:

DTC B2432 is not output.

OK

USE SIMULATION METHOD TO CHECK

NG

1. CHECK HARNESS AND CONNECTOR (AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) - HEADLIGHT ASSEMBLY)

(a) Disconnect the D44 AFS ECU (headlight swivel ECU assembly) connector.

(b) Disconnect the P12 inner rear view mirror assembly connector.

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

Standard Resistance:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

1. INSPECT AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY)

(a) Reconnect the D44 AFS ECU (headlight swivel ECU assembly) connector.

(b) Connect an oscilloscope to the P12 inner rear view mirror assembly connector.

(c) Check the waveform. OK: Tester Connection Tool Setting Condition Specified Condition P12-3 (LIN) - P12-2 (E) 2 V/DIV., 20 ms./DIV. Ignition switch ON Correct waveform is as shown Text in Illustration *1 Front view of wire harness connector (to Inner Rear View Mirror Assembly)

OK

REPLACE INNER REAR VIEW MIRROR ASSEMBLY

NG

REPLACE AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY)