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Check Vehicle Speed Sensor

CHECK STEP FOR VEHICLE SPEED SENSOR

Step Check Yes No
1 CHECK VEHICLE SPEED SENSOR. 
  1. Lift up the vehicle.
  2. Remove the combination meter with harness connector.
  3. Drive the vehicle faster than 20 km/h (12 MPH).
    WARNING: Be careful not to get caught in the running wheels.
  4. Measure the voltage between combination meter connector and chassis ground.

Connector & terminal 

(i11) No. 2 (+) - Chassis ground (-): 

Is the voltage less than 1 V ↔ 5 V or more? Except for STI model: Check the speedometer. <Ref. to REMOVAL , SPEEDOMETER.> STI model: Replace the meter main assembly. Go to step 2. 
2 CHECK VEHICLE SPEED SENSOR POWER SUPPLY. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the vehicle speed sensor harness connector.
  3. Turn the ignition switch to ON.
  4. Measure the voltage between the speed sensor connector and the engine ground.

Connector & terminal 

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

Is the voltage 10 V or more? Go to step 3.  Check the harness for open or short between the ignition switch and vehicle speed sensor.
3 CHECK HARNESS BETWEEN VEHICLE SPEED SENSOR AND ENGINE GROUND. 
  1. Turn the ignition switch to OFF.
  2. Measure the resistance between the speed sensor connector and the engine ground.

Connector & terminal 

(B17) No. 2 - Chassis ground: 

Is the resistance less than 10 Ω? Go to step 4.  Repair the wiring harness.
4 CHECK HARNESS BETWEEN VEHICLE SPEED SENSOR AND COMBINATION METER. 
  1. Disconnect the connector from the combination meter.
  2. Measure the resistance between the speed sensor harness connector and combination meter.

Connector & terminal 

(B17) No.1 - (i11) No.2: 

Is the resistance less than 10 Ω? Replace the vehicle speed sensor. Repair the wiring harness.