DTC 29 (P0500): Vehicle Speed Sensor System

CIRCUIT OPERATION
4.8 - 5.2 volts voltage is applied to the vehicle speed sensor from the PCM (terminal 80). The vehicle speed sensor generates a pulse signal when the output terminal is opened and ground.
The PCM compares the vehicle speed sensor signal to input shaft and output shaft speed sensor signals.
If the vehicle speed sensor becomes inoperative, the transmission will not shift normally.
DESCRIPTIONS OF MONITOR METHODS
If there is no detection pulse from vehicle speed sensor even when output shaft revolution equals or exceeds specified value, PCM judges that vehicle speed sensor has a failure.
MONITOR EXECUTION
Continuous
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
• DTC 23 (P0720): Output shaft speed sensor malfunction

Sensor (The sensor below is determined to be normal)
• Output shaft speed sensor
LOGIC FLOW CHARTS (Monitor Sequence)
DTC SET CONDITIONS

Check Conditions
Transmission fluid temperature sensor voltage: 4.5 volts or less.
Transmission range switch: D, 3, 2 or L.
Output speed: 900 r/min or more.

Judgement Criteria
Vehicle speed: no signal change. (30 seconds)
OBD-II DRIVE CYCLE PATTERN
Start the engine, drive at 40 km/h (25 mph) or more continuously for one minute.
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:
Malfunction of the vehicle speed sensor circuit
Damaged harness, connector
Malfunction of the PCM