DTC 42

CODE 42 - VEHICLE SPEED SENSOR CIRCUIT

Circuit Description




The vehicle speed sensor outputs a 4-pulse signal for every revolution of the rotor shaft, which is rotated by the transmission output shaft via the driven gear. After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit inside the combination meter, it is then transmitted to the engine control module. The ECM determines the vehicle speed based on the frequency of these pulse signals.




Detecting Condition

NOTE: In test mode, diagnostic trouble code 42 is output when vehicle speed is 3 mph (5 km/h) or below.




Diagnostic Chart




Wiring Diagram

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Step 2:

Inspection Procedure