Problem Symptoms Table [09/2014 - ]
WARNING: This page is about a different car, the 2020 Lexus GS 350, 2019 Lexus GS 350, and 2018 Lexus GS 350. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
FOUR WHEEL DRIVE CONTROL SYSTEM
| Symptom | Suspected Area | Reference |
|---|---|---|
| Phenomenon of tight-corner braking* | Steering sensor circuit | Refer to DTC C1297/97: Steering Angle Sensor [09/2014 - ] |
| Transfer control solenoid circuit | Refer to DTC C1298/98: Linear Solenoid Circuit [09/2014 - ] | |
| 4WD ECU assembly | Refer to TERMINALS OF ECU [09/2014 - ] | |
| Automatic with transfer transmission assembly | Refer to REMOVAL [09/2014 - ] | |
| AWD warning remains on | AWD warning light circuit | Refer to AWD Warning Light Remains ON [09/2014 - 10/2015] , or refer to AWD Warning Light Remains ON [10/2015 - ] |
| AWD warning does not come on | AWD warning light circuit | Refer to AWD Warning Light does not Come ON [09/2014 - ] |
| The system is in the DTC output mode although terminals TC and CG of the DLC3 are not shorted | TC and CG terminal circuit | Refer to TC and CG Terminal Circuit [09/2014 - 10/2015] , or refer to TC and CG Terminal Circuit [10/2015 - ] |
| The system is not in the DTC output mode although terminals TC and CG of the DLC3 are shorted | TC and CG terminal circuit | Refer to TC and CG Terminal Circuit [09/2014 - 10/2015] , or refer to TC and CG Terminal Circuit [10/2015 - ] |
| 4WD warning light circuit | Refer to AWD Warning Light does not Come ON [09/2014 - ] |
HINT:
* Phenomenon of tight-corner braking
*: When driving 4-wheel drive mode, the vehicle is hard to turn, as if the brakes were applied, due to the rotational difference between the front and rear tires while turning.