TECHNICAL DESCRIPTION
- The ECM receives the vehicle speed signal from the ASC-ECU by the CAN bus line.
DESCRIPTIONS OF MONITOR METHODS
When the signal not available as the vehicle speed information send from ASC-ECU, a malfunction is determined to have occurred.
MONITOR EXECUTION
Continuous
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC set in memory for the item monitored below)
Sensor (The sensor below is determined to be normal)
DTC SET CONDITIONS (Entry Conditions and Malfunction Thresholds)
Check Conditions
- More than 2 seconds have passed since the power supply mode of the electric motor switch was ON.
- 12V starter battery positive voltage is between 10 and 16.5 volts.
Judgment Criterion
- Vehicle speed information from ASC-ECU is fail for 2 seconds.
FAIL-SAFE AND BACKUP FUNCTION
OBD-II DRIVE CYCLE PATTERN
- Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 4 .
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
- Wheel speed sensor of ASC system failed.
- ASC-ECU failed.
- ECM failed.