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DTC 22 Vehicle Speed Sensor

WARNING: This page is about a different car, the 2006 Subaru Baja. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSIS: 

Disconnection or short circuit of vehicle speed sensor system.

TROUBLE SYMPTOM: 

Cruise control cannot be set. (Cancelled immediately.)

WIRING DIAGRAM: 

Fig 1: Vehicle Speed Sensor Wiring Diagram
G04991897Courtesy of SUBARU OF AMERICA, INC.
DTC 22 VEHICLE SPEED SENSOR DIAGNOSTIC REFERENCE

Step Check Yes No
1 CHECK TRANSMISSION TYPE.  Is the transmission type MT? Go to step 2.  Go to step 6. 
2 CHECK HARNESS BETWEEN BATTERY AND VEHICLE SPEED SENSOR. 
  1. Turn ignition switch to OFF.
  2. Disconnect harness connector from vehicle speed sensor.
  3. Turn ignition switch to ON. 4) Measure voltage between vehicle speed sensor harness connector terminal and chassis ground.

    Connector & terminal 

    (B17) No. 3 (+) - Chassis ground (-): 

 Is the measured value less than 10 V? Go to step 3.  Check harness for open or short between ignition relay and vehicle speed sensor.
3 CHECK HARNESS BETWEEN CRUISE CONTROL MODULE AND VEHICLE SPEED SENSOR. 
  1. Turn ignition switch to OFF.
  2. Disconnect harness connector from cruise control module.
  3. Measure resistance between vehicle speed sensor harness connector terminal and cruise control module harness connector terminal.

    Connector & terminal 

    (B17) No. 1 - (B94) No. 19: 

 Is the measured value less than 10 Ω? Go to step 4.  Repair harness.
4 CHECK HARNESS BETWEEN VEHICLE SPEED SENSOR AND ENGINE GROUND. 
Measure resistance between vehicle speed sensor harness connector terminal and engine ground.
Connector & terminal 
(B17) No. 2 (+) - Engine ground (-): 		 Is the measured value less than 10 Ω? Go to step 5.  Repair harness.
5 CHECK VEHICLE SPEED SENSOR. 
  1. Connect harness connector to vehicle speed sensor.
  2. Lift-up the vehicle and support with safety stands.
  3. Drive the vehicle at speed greater than 20 km/h (12 MPH).
    WARNING: Be careful not to be caught up by the running wheels.
  4. Measure voltage between cruise control module harness connector terminal and chassis ground.

    Connector & terminal 

    (B94) No. 19 (+) - Chassis ground (-): 

 Is the measured value less than 0 V or more than 5 V? Replace cruise control module. < Ref. to CRUISE CONTROL MODULE . > Replace vehicle speed sensor.
6 CHECK HARNESS BETWEEN CRUISE CONTROL MODULE AND TRANSMISSION CONTROL MODULE. 
  1. Turn ignition switch to OFF.
  2. Disconnect harness connector from transmission control module and cruise control module.
  3. Measure resistance between cruise control module harness connector terminal and transmission control module harness connector terminal.

    Connector & terminal 

    (B94) No. 19 - (B55) No. 13: 

 Is the measured value less than 10 Ω? Go to step 7.  Repair harness.
7 CHECK TRANSMISSION CONTROL MODULE. 
  1. Connect harness connector to transmission control module.
  2. Lift-up the vehicle and support with safety stands.
  3. Drive the vehicle faster than 10 km/h (6 MPH).
    WARNING: Be careful not to be caught by the running wheels.
  4. Measure voltage between transmission control module harness connector terminal and chassis ground.

    Connector & terminal 

    (B55) No. 13 (+) - Chassis ground (-): 

 Is the measured value less than 0 V or more than 5 V? Replace cruise control module. < Ref. to CRUISE CONTROL MODULE . > Replace transmission control module. < Ref. to TRANSMISSION CONTROL MODULE (TCM) (4AT). >
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