Automatic Transmission System - How To Proceed With Troubleshooting
Lexus IS250 IS220d GSE20 ALE20 - A960E AUTOMATIC TRANSMISSION
AUTOMATIC TRANSMISSION SYSTEM - HOW TO PROCEED WITH TROUBLESHOOTING
The ECM of this system is connected to the CAN and multiplex communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN and multiplex communication systems.
*: Use the intelligent tester.
| 1.VEHICLE BROUGHT TO WORKSHOP |
| 2.CUSTOMER PROBLEM ANALYSIS |
| 3.INSPECT BATTERY VOLTAGE |
- Standard voltage:
- 11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding.
| 4.CONNECT INTELLIGENT TESTER TO DLC3* |
| 5.CHECK AND CLEAR DTCS AND FREEZE FRAME DATA* |
Refer to the DTC CHECK/CLEAR .
| 7.SETTING CHECK MODE DIAGNOSIS* |
Refer to the CHECK MODE PROCEDURE .
| 8.PROBLEM SYMPTOM CONFIRMATION |
Refer to the ROAD TEST .
- Result:
| Result | Proceed to |
| Symptom does not occur | A |
| Symptom occurs | B |
Refer to the ELECTRONIC CIRCUIT INSPECTION PROCEDURE .
Refer to the DTC CHECK / CLEAR .
- Result:
| Result | Proceed to |
| DTC is not output | A |
| DTC is output | B |
Refer to the AUTOMATIC TRANSMISSION FLUID .
Refer to the PARK/NEUTRAL POSITION SWITCH .
Refer to the SHIFT LEVER ASSEMBLY .
| 12.MECHANICAL SYSTEM TEST |
Refer to the MECHANICAL SYSTEM TEST .
Refer to the HYDRAULIC TEST .
Refer to the MANUAL SHIFTING TEST .
| 15.PROBLEM SYMPTOMS TABLE CHAPTER 1 |
Refer to the PROBLEM SYMPTOMS TABLE .
| 16.PROBLEM SYMPTOMS TABLE CHAPTER 2 |
Refer to the PROBLEM SYMPTOMS TABLE .
Refer to the DIAGNOSTIC TROUBLE CODE CHART .
| 20.IDENTIFICATION OF PROBLEM |
LEXUS IS250, IS220d / GSE20 ALE20