Avenger L4-2.0L DOHC (1995)
Vehicle Speed Sensor: Description and Operation
With EATX
NAME OF CODE:
No Vehicle Speed Sensor Signal
WHEN MONITORED:
With engine running more than 31 seconds, engine temperature greater than 120°F, transmission not in park or neutral, brakes not applied, engine
speed greater than 1,800 rpm, and MAP vacuum less than 11".
SET CONDITION:
No signal from the vehicle speed sensor (TCM) is present for more than 11 seconds.
THEORY OF OPERATION:
The vehicle speed sensor signal is provided to the PCM by the TCM. The signal is calculated by the TCM based on the output speed sensor signal
and the speedometer pinion factor. The PCM supplies a 5 volt pull-up voltage from cavity 5 to TCM cavity 58. The sensor signal is created by the
TCM alternating the signal from 5V to 0.3V.
POSSIBLE CAUSES:
-
Open or shorted signal circuit
-
Speedometer pinion factor not programmed
-
Output vehicle speed sensor circuit problem
-
PCM failure
-
TCM failure
