DTC B2415: Vehicle Speed Sensor Malfunction: Procedure

1. Check the vehicle stability control systems

   OK

   Normal system code is output.

NG → GO TO  PROBLEM SYMPTOMS TABLE 

OK: Go to next step 

1. Disconnect the A58 skid control ECU connector.
   Fig 1: Disconnecting A28 AFS ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the A28 AFS ECU connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   A58-5 (FRO) - A28-7 (SPDR)	Always	Below 1 Ω
   A58-4 (FLO) - A28-6 (SPDL)	Always	Below 1 Ω
   A28-7 (SPDR) - Body ground	Always	10 kΩ or higher
   A28-6 (SPDL) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Reconnect the A28 AFS ECU connector.
   Fig 2: Checking AFS ECU

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage of the connector.

   Standard voltage

   Tester Connection	Condition	Specified Voltage
   A28-6 (SPDL) - Body ground	Vehicle is driving at approx. 30 km/h (19 mph)	0 to 5 V Pulse generation (see Figure)
   A28-7 (SPDR) - Body ground	Vehicle is driving at approx. 30 km/h (19 mph)	0 to 5 V Pulse generation (see Figure)

   1. Waveform 1: Oscilloscope wave
      Fig 3: Identifying Signal Waveform Graph (Waveform 1)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Item	Contents
      Tool setting	2 V / DIV., 2 ms / DIV.
      Vehicle condition	Vehicle is driving at approximately 30 km/h (19 mph)

      OK

      Waveform is output as shown in the illustration.

      Result

      Result	Proceed to
      OK (When checking from DIAGNOSTICS TROUBLE CODE CHART)	A
      OK (When checking from PROBLEM SYMPTOMS TABLE)	B
      NG	C

C → REPLACE SKID CONTROL ECU ASSEMBLY 

B → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

A → REPLACE AFS ECU 

1. Check the electronically controlled brake systems.

   OK

   Normal system code is output.

NG → GO TO  PROBLEM SYMPTOMS TABLE 

OK: Go to next step 

Fig 1: Checking Wire Harness (Skid Control ECU - AFS ECU)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the A28 AFS ECU connector.
2. Disconnect the A13 and A15 skid control ECU connectors.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   A13-10 (FRO) - A28-7 (SPDR)	Always	Below 1 Ω
   A15-10 (FLO) - A28-6 (SPDL)	Always	Below 1 Ω
   A28-7 (SPDR) - Body ground	Always	10 kΩ or higher
   A28-6 (SPDL) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Reconnect the A28 AFS ECU connector.
   Fig 2: Checking AFS ECU

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage of the connector.

   Standard voltage

   Tester Connection	Condition	Specified Condition
   A28-6 (SPDL) - Body ground	Vehicle is driving at approx. 30 km/h (19 mph)	0 to 5 V Pulse generation (see Fig 3)
   A28-7 (SPDR) - Body ground	Vehicle is driving at approx. 30 km/h (19 mph)	0 to 5 V Pulse generation (see Fig 3)

   1. Waveform 1: Oscilloscope wave
      Fig 3: Identifying Signal Waveform 1

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Item	Contents
      Tool setting	2 V / DIV., 2 ms / DIV.
      Vehicle condition	Vehicle is driving at approximately 30 km/h (19 mph)

      OK

      Waveform is output as shown in the illustration.

      Result

      Result	Proceed to
      OK (When checking from DIAGNOSTICS TROUBLE CODE CHART)	A
      OK (When checking from PROBLEM SYMPTOMS TABLE)	B
      NG	C

C → REPLACE SKID CONTROL ECU ASSEMBLY 

B → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

A → REPLACE AFS ECU