DTC B2414: Steering Position Sensor Malfunction: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn the Techstream on.
3. Select the items below in the DATA LIST, and read the displays on the Techstream.
   AFS (AFS ECU)
   
   

   Item	Measurement Item / Range	Normal Condition	Diagnostic Note
   Steering Sens Signal	Steering sensor signal value / -384°to 382.5°	Approx. 0° (When steering wheel is straight)	-

   OK

   Condition sign can be displayed.

   Result

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

C → See step   2 

B → REPLACE AFS ECU 

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

1. Check the DTC of vehicle stability control system.

   OK

   Normal system code is output.

NG → GO TO  PROBLEM SYMPTOMS TABLE 

OK: Go to next step 

1. Check vehicle condition.

   Result

   Result	Proceed to
   w/o Variable Steering Gear Ratio Control	A
   w/ Variable Steering Gear Ratio Control	B

B → See step   6 

A: Go to next step 

1. Disconnect the K19 steering sensor connector.
   Fig 1: Disconnecting A29 AFS ECU Connector And K19 Steering Sensor Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the A29 AFS ECU connector.
3. Measure the resistance of the wire harness.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   K19-7 (SS1-) - A29-8 (SS-)	Always	Below 1 Ω
   K19-8 (SS1+) - A29-7 (SS+)	Always	Below 1 Ω
   A29-8 (SS-) - Body ground	Always	10 kΩ or higher
   A29-7 (SS+) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Reconnect the K19 steering sensor connector.
   Fig 2: Checking AFS ECU

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Reconnect the A29 AFS ECU connector.
3. Measure the voltage of the connector.

   Standard voltage

   Tester Connection	Condition	Specified Condition
   A29-7 (SS+) - A29-8 (SS-)	Engine switch on (IG)	0 to 5 V (Pulse generation)

   Result

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

C → REPLACE STEERING ANGLE SENSOR 

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

A → REPLACE AFS ECU 

1. Disconnect the A40 Steering Control ECU connector.
   Fig 3: Checking Wire Harness (Steering Control ECU - AFS ECU)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect The A29 AFS ECU connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   A40-5 (AFS-) - A29-8 (SS-)	Always	Below 1 Ω
   A40-2 (AFS+) - A29-7 (SS+)	Always	Below 1 Ω
   A29-8 (SS-) - Body ground	Always	10 kΩ or higher
   A29-7 (SS+) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Reconnect the A29 AFS ECU connector.
   Fig 4: Checking AFS ECU

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

   Standard voltage

   Tester Connection	Condition	Specified Condition
   A29-7 (SS+) - A29-8 (SS-)	Engine switch on (IG)	0 to 5 V (Pulse generation)

   Result

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

C → REPLACE STEERING CONTROL ECU 

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

A → REPLACE AFS ECU