3.
Monitor DTC(Diagnostics Trouble Code) on the scantool.
Many control units is applied to the vehicle due to vehicle to be electronic control type and these perform many controls by receiving signals from sensors. So the common use of each sensors and the need of comunizing informations became a prominent figure. CAN comunication method is used at power train (ABS, trnasmission, engine, ECS etc) control of vehicle because it withstands eletronical external noise by spark and can high-speed comunication. Though CAN communication, ECM and TCM hold engin RPM, APS, step of trensmission, decreasing of torque in common and perform the active control.
This DTC is set when inappropriate 4WD-ECU(TCCU) is detected.
If failure is detected TCCU prohibits the ITM control.
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● Invalid part number | ● Part Number ● Faulty TCCU |
Enable Conditions | ● Ignition cycle required | |
Threshold Value | ● 1 occurrence will mature | |
Diagnostic Time | ● 1.0 Sec | |
MIL on condition | ● 0.5 Sec | |
Fail Safe | ● Clutch will not react correctly as vehicle inputs are not defined |
Connect scantool to Data Link Connector(DLC).
Warm up the engine to normal operating temperature.
Monitor DTC(Diagnostics Trouble Code) on the scantool.
Is the same DTC displayed again?
▶ Check if equipped option(ABS/TCS, ESP) and part number is qualified specification Repair or replace as necessary and go to "Verification of vehicle Repair" procedure.
▶ Fault is intermittent caused by poor contact in the sensor’s and/or TCCU’s connector or was repaired and TCCU 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 of vehicle Repair" procedure.
Connect scan tool and select "Diagnostic Trouble Codes(DTCs)" mode.
Using scantool, Clear DTC.
Operate the vehicle within DTC Enable conditions in General information.
Are any DTCs present ?
▶ Go to the applicable troubleshooting procedure.
▶ System is performing to specification at this time.
