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Home >> Toyota >> 2003 >> Matrix Base, FWD, Standard >> Repair and Diagnosis >> Electrical >> Gauges >> Combination Meter - Diagnostics >> Malfunction In Speedometer >> Inspection Procedure
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Inspection Procedure

  1. CHECK COMBINATION METER ASSY 
    Fig 1: Identifying Combination Meter Connector Terminal (SP IN)
    G02837184Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the combination meter assy with connector still connected.
    2. Check voltage.
      1. Jack up either of the front wheels.
      2. Shift the shift lever to neutral.
      3. Turn the ignition switch to ON.
      4. Measure the voltage between terminals C11-18 of combination meter assy and body ground when front wheel is turning slowly.

      Standard voltage: 

      Voltage is generated intermittently. 

      Fig 2: Combination Meter Voltage Graph
      G02837185Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result: 

      RESULT - MALFUNCTION IN SPEEDOMETER REFERENCE

      A B C
      OK NG (w/ ABS) NG (w/o ABS)
    1. B: Go to   2 
    2. C: Go to   3 
    3. A: CHECK AND REPLACE COMBINATION METER ASSY 
  2. CHECK OBD II SCAN TOOL OR TOYOTA HAND-HELD TESTER 
    1. Check output value of skid control ECU.
      1. Connect the hand-held tester to DLC3.
      2. Turn the ignition switch to ON and push the hand-held tester main switch ON.
      3. Select the DATA LIST mode on the hand-held tester.
      4. Check that there is no difference between the speed value output from the speed sensor displayed by the hand-held tester and the speed value displayed by the speedometer when driving the vehicle.

      OK: THERE IS ALMOST NO DIFFERENCE FROM THE DISPLAYED SPEED VALUE 

    1. NG: GO TO BRAKE SYSTEM 
    2. OK: REPAIR OR REPLACE HARNESS OR CONNECTOR 
  3. INSPECT SPEEDOMETER SENSOR 
    Fig 3: Identifying Speedometer Sensor Connector Terminal
    G02837186Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Check voltage.
      1. Shift the shift lever to neutral.
      2. Jack up either of the front wheel.
      3. Turn the ignition switch to ON.
      4. Measure voltage between terminals 3 and 2 of speed sensor when the front wheel is turning slowly.

      Standard voltage: 

      Voltage is generated intermittently. 

      Fig 4: Speedometer Sensor Voltage Graph
      G02837187Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: CHECK AND REPLACE SPEEDOMETER SENSOR 
    2. OK: REPAIR OR REPLACE HARNESS OR CONNECTOR 
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