U0114

Component Location






General Description

Several control units are applied to electronically controlled vehicles. These units perform each control with informations from various sensors. Thus, sharing signal information from sensors is needed, so CAN communication type whose communication speed is high and insensitive to electrical noise by spark generation is adopted to controlling power-train(TCM, ECM, CLUSTER,VDC,4WD,EAS,SAS, EPS)
CAN communication consists of CAN BUS HIGH, CAN BUS LOW and two 120Ohms resistances in circuit.

DTC Description

TCM set this code If not receive CAN message form 4WD.(MIL OFF)

DTC Detecting Condition






Diagnostic Circuit Diagram










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?






Check for resistance of CAN communication

Check resistance of CAN communication -1
1. IG KEY OFF.
2. Connect ECM, TCM, 4WD, VDC(ABS/TCS), EAS, SAS and CLUSTER connector.
3. Measure resistance between #3 terminal and #11 terminal of "DLC".

Specification :Approx. 60 Ohms

4. Is measured resistance within specifications ?






Check resistance of CAN communication -2
1. IG KEY OFF.
2. Disconnect ECM connector.
3. Measure resistance between #3 terminal and #11 terminal of "DLC".

Specification :Approx. 120 Ohms

4. Is measured resistance within specifications ?






Check resistance of CAN communication -3
1. IG KEY OFF.
2. Disconnect CLUSTER connector.
3. Measure resistance between #3 terminal and #11 terminal of "DLC".

Specification :Approx. 120 Ohms

4. Is measured resistance within specifications ?






CAN

Check short of CAN communication line.
1. IG KEY OFF.
2. Connect TCM, ECM, CLUSTER connector.
3. Measure voltage between TCM CAN HIGH and CAN LOW terminal.

Specification :Approx. 2.3V

4. Is measured voltage within specifications ?






Check open in CAN communication line
1. IG KEY OFF.
2. Disconnector TCM, ECM and CLUSTER connector.
3. Measure resistance between TCM CAN HIGH or CAN LOW and CLUSTER CAN HIGH or CAN LOW terminal.

Specification :Approx. 0Ohms

4. Is measured resistance within specifications ?






Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect scantool and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Using a scan tool, Clear DTC.
3. Operate the vehicle within DTC Enable conditions in General information.
4. Are any DTCs present ?