U0100

DTC U0100 CAN-TIME OUT ECU





COMPONENT LOCATION

GENERAL DESCRIPTION
Refer to DTC U0001.

DTC DESCRIPTION
The TCM reads data on the CAN-BUS line and checks whether the data is equal to the data which the TCM sent before. If the data is not the same the TCM decides that either the CAN-BUS line or TCM are malfunctioning and sets this code.





DTC DETECTING CONDITION

MONITOR SCANTOOL DATA
1. Connect scantool to data link connector (DLC).
2. Engine "ON".
3. Monitor the "CAN COMMUNICATION SERVICE DATA (ENGINE RPM, VEHICLE SPEED SENSOR, THROTTLE P. SENSOR)" parameters on the scantool.





4. Compare it with reference data as below.
5. Does "CAN BUS LINE DATA" follow the reference data?
YES >>
^ Fault is intermittent caused by poor contact in the sensor's and/or TCM (PCM)'s connector or was repaired and TCM (PCM) memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration or damage. Repair or replace as necessary and go to "Verification Vehicle Repair" procedure.
NO >>
^ Go to "Terminal & Connector Inspection" procedure.

TERMINAL & CONNECTOR INSPECTION
1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?
YES >>
^ Repair as necessary and go to "Verification vehicle Repair" procedure.
NO >>
^ Go to "Signal circuit inspection" procedure.

SIGNAL CIRCUIT INSPECTION
1. Ignition "ON" & Engine "OFF".
2. Disconnect the "PCM/TCM" connector.





3. Measure resistance between terminal "6" and "7" of the "PCM/TCM" harness connector.
Specification: approximately 60 Ohms
4. Is measured resistance within specifications?
YES >>
^ Substitute with a known-good PCM/TCM and check for proper operation. If the problem is corrected, replace PCM/TCM as necessary and then go to "Verification of Vehicle Repair" procedure.
NO >>
^ Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration or damage of ECM, and then Repair or replace Resistance for CAN communication as necessary and go to "Verification Vehicle Repair" procedure.

VERIFICATION OF VEHICLE REPAIR
Refer to DTC P0560. P0560