Description

DATA TROUBLE CODE: 42

SYSTEM: No. 1 Vehicle Speed Sensor Signal





CIRCUIT DESCRIPTION
The No. 1 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 Engine Control Module determines the vehicle speed based on the frequency of these pulse signals.

DIAGNOSTIC TROUBLE CODE DETECTING CONDITION
- All conditions below are detected continuously for 8 seconds or more.
- No. 1 vehicle speed signal: 0 km/h (0 mph).
- Engine speed: 1.500 rpm or more.
- Park/neutral position switch: OFF.

TROUBLE AREA
- No. 1 Vehicle Speed Sensor.
- Combination meter.
- Open or short in No. 1 Vehicle Speed Sensor circuit.
- Engine Control Module

NOTE: In test mode, Diagnostic Trouble Code 42 is output when vehicle speed is 5 km/h (3 mph) or below.

Malfunction Indicator Lamp

Normal Mode OFF
Test Mode ON