2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES–287
ES
DESCRIPTION
The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU.
The skid control ECU converts these wheel speed signals into a 4-pulse signal and outputs it to the ECM
via the combination meter. The ECM determines the vehicle speed based on the frequency of these pulse
signals.
MONITOR DESCRIPTION
The ECM assumes that the vehicle is being driven when the transmission counter gear indicates more
than 300 rpm and over 30 seconds have passed since the park/neutral position switch was turned OFF. If
there is no signal from the vehicle speed sensor with these conditions satisfied, the ECM concludes that
the vehicle speed sensor is malfunctioning. The ECM will turn on the MIL and a DTC will be set.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
DTC P0500 Vehicle Speed Sensor "A"
DTC No. DTC Detection Condition Trouble Area
P0500
Vehicle speed signal from vehicle speed sensor is cut
for 0.14 sec. or more while cruise control is in operation
• Vehicle speed sensor
• Vehicle speed sensor signal circuit
• Combination meter
•ECM
• Skid control ECU
Related DTCs P0500: Vehicle Speed Sensor Circuit
Required sensors / components (Main) Vehicle speed sensor, Combination meter, ABS ECU
Required sensors / components (Sub) Counter gear Speed (CS) sensor, ECT sensor
Frequency of operation Continuous
Duration 8 seconds
MIL operation 2 driving cycles
Sequence operation None
The monitor will run whenever these DTCs are not present
P0100 - P0103 (MAF sensor)
P0105 - P0108 (MAP sensor)
P0115 - P0118 (ECT sensor)
P0120 - P02238 (TP sensor)
P0125 (VSS/ECT1 sensor, non-ECT)
Engine coolant temperature 70°C (158°F) or more
From
Speed Sensor
Skid Control
ECU
4-Pulse 4-Pulse
Combination Meter
ECM
A079413E16
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