B2415

LIGHTING: LIGHTING SYSTEM: B2415: Vehicle Speed Sensor Malfunction

DTC B2415 - Vehicle Speed Sensor Malfunction

DESCRIPTION

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






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)
(a) Check the electronically controlled brake system.
OK:
DTC is not output.
NG -- GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM
OK -- Continue to next step.
2. CHECK WIRE HARNESS (SKID CONTROL ECU - AFS ECU)




(a) Disconnect the A13, A15 and A28 ECU connectors.
(b) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK AFS ECU




(a) Measure the voltage of the connector.
Standard voltage:










(1) Using an oscilloscope, check waveform 1.






OK:
Waveform is output as shown in the illustration.






C -- REPLACE SKID CONTROL ECU
B -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
A -- REPLACE AFS ECU