Automatic Transmission System

Component Location






General Description

TCM supply Power source to each sensors and solenoids in order to optimum control.It is difficult check for power supply circuit Because E-module installed in inside Automatic transmission.

DTC Description

TCM set this code If supplied voltage form TCM is too high.(MIL ON : 2 driving Cycle)

DTC Detecting Condition






CAUTION:
1. The function with the higher priority will always take precedence. However, a low-priority is not overruled by a higher priority function.
2. Functions from different priority categories can also run in parallel. It is important to note which function will take precedence in this case.
3. In such an event it is possible for a substitute function with low priority not be carried out if a second, higher-priority function is present. This has been taken into account when compiling the priority list and is international.
4. The mechanical emergency run function must always have the highest priority, since from the electrical standpoint it is the only safe condition.

Signal Waveform & Data






Fig 1) Main relay and Battery voltage(Idle status)

Monitor Scantool Data

1. Connect scantool to Diagnostic Connector.
2. Ignition "ON" & Engine "OFF".
3. Confirm the "Battery Voltage,Ignition Key Status,Main Relay Voltage, parameter on the scan tool.






Fig 1) Main relay and Battery voltage(Idle status)
4. Is "Battery Voltage" output value within normal range ?






Component Inspection

1. Ignition "ON" & Engine "OFF".
2. Connect scantool and check DTC.
3. Erase the DTC with scantool.
4. After turning IG OFF to IG ON twice or three times, check DTC again.
5. Does the scantool show same DTC again ?






How to perform Initial Learning

If you replace the automatic transmission or Mechatronics (Valve-body + TCM), or if you overwrite the TCU software, be sure to initialize the learned values and perform initial learning.

Step 1) Warm-up
Raise the ATF temperature by leaving the vehicle idling or performing city drive. Check the ATF temperature using the Scan-tool and make sure it is between 50°C( 122 °F) and 120°C( 248 °F). If the ATF temperature is outside this range, work to bring the range.

CAUTION:
Don't raise the oil temperature by stalling the engine.

(Reference)
If the oil temperature is not between 50°C( 122 °F) and 120°C ( 248 °F), initial learning can not be performed. Before learning, check for variable speed shock or shift shock.

STEP 2) Driving learning
Select "D" range then depress accelerator pedal smoothly, and keep the APS value 17%, shift gear to 5th gear.
Keep the vehicle speed over 60kM/h.
In condition that release the accelerator pedal and then depress the brake pedal normally.Stop the vehicle then keep 5seconds.

STEP 3) Repeat this procedure 10 times.(Not necessary N-D,N-R Learning)

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 ?