Continuously Variable Transmission/Transaxle, CVT
DTC U0001: Malfunction of CAN Communication CircuitDIAGNOSTIC FUNCTION
TCM conducts bus-off detection.
DESCRIPTIONS OF MONITOR METHODS
^ TCM cannot receive the periodic communication data.
MONITOR EXECUTION
^ When 1.05 seconds have elapsed after TCM started
MONITOR EXECUTION CONDITIONS (OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
^ P0703: Malfunction of stoplight switch
^ P0705: Malfunction of transmission range switch
^ P0715: Malfunction of primary pulley speed sensor
^ P0720: Malfunction of secondary pulley speed sensor
^ P0725: Malfunction of engine speed
^ P0741: Abnormality in lockup function
^ P0746: Abnormality in hydraulic control system function
^ P0841: Abnormality in line pressure sensor function
^ P0868: Secondary pressure drop
^ P1706: Malfunction of throttle signal
^ P1773: Malfunction of ABS
^ U0100: CAN time-out error (Engine)
Sensor (The sensor below is determined to be normal)
^ Stoplight switch
^ Transmission range switch
^ Primary pulley speed sensor
^ Secondary pulley speed sensor
LOGIC FLOW CHARTS (Monitor Sequence)
DTC SET CONDITIONS
Check Conditions
^ Time after TCM start: more than 1.05 seconds.
^ Voltage of battery: 9 volts or more
^ Voltage of battery: 16 volts or less
Judgment Criteria
^ CAN communication: fail
OBD-II DRIVE CYCLE PATTERN
Ignition switch : ON (start the engine and keep it for 10 seconds or more)
PROBABLE CAUSES
^ Malfunction of the CAN bus
DIAGNOSTIC PROCEDURE
STEP 1. M.U.T.-III CAN bus diagnostics
Use M.U.T.-III to perform the CAN bus diagnosis.
Q:Is the check result normal?
YES : Intermittent malfunction
NO : Repair the CAN bus lines (Refer to Troubleshooting, Diagnosis Code Chart). CAN Bus Diagnostics Chart