B2415

LIGHTING (EXT): LIGHTING SYSTEM: B2415: Vehicle Speed Sensor Malfunction
B2415 - Vehicle Speed Sensor Malfunction

DESCRIPTION

The AFS ECU receives front wheel speed sensor signals from the skid control ECU.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM)

(a) Check that vehicle stability control system DTCs are not output.

Result:





B -- REPAIR CIRCUITS INDICATED BY OUTPUT DTCS Vehicle Stability Control System
A -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - AFS ECU)

(a) Disconnect the A28 AFS ECU connector.





(b) Disconnect the A58 skid control ECU connector.

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

Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. CHECK AFS ECU

(a) Disconnect the A28 AFS ECU connector.





(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





Text in Illustration





(1) Waveform 1: Oscilloscope wave









OK:

Waveform is output as shown in the illustration.

Result:





C -- REPLACE SKID CONTROL ECU ASSEMBLY

B -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Exterior Lighting System

A -- REPLACE AFS ECU Components