Speedometer Malfunction: Procedure

1. Check the input signal waveform.
   Fig 1: Identifying C11 Connector Terminals

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   1. Remove the combination meter assembly.
   2. Connect the oscilloscope to terminal C11-15 and body ground.
   3. Start the engine.
   4. Check the signal waveform according to the condition(s) in the table below.
      Fig 2: Identifying Signal Waveform Graph

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      Item	Condition
      Tool setting	5 V/DIV., 20 ms/DIV.
      Vehicle condition	Driving at approx. 20 km/h (12.4 mph)

      HINT: 

      As vehicle speed increases, the cycle of the signal waveform narrows.

NG → See step   2 

OK → REPLACE COMBINATION METER ASSEMBLY 

1. Disconnect the S37 and C11 connectors.
   Fig 3: Identifying S37 & C11 Connector Terminals

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2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   S37-12 (SP1) - C11-15 (SP IN)	Always	Below 1 Ω
   S37-12 (SP1) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE SKID CONTROL ECU ASSEMBLY