Four Wheels Drive Control System
WARNING: This page is about a different car, the 2007 Lexus GS 350. However, it is still accessible from the selected car via links, so may be relevant.
PROBLEM SYMPTOMS CHART
| Symptom | Suspected Area | See |
|---|---|---|
| Phenomenon of tight-corner braking* | 1. Steering angle sensor circuit | DTC C1297/97 STEERING ANGLE SENSOR |
| 2. Transfer control solenoid circuit | DTC C1298/98 LINEAR SOLENOID CIRCUIT | |
| 3. 4WD control ECU | - | |
| 4. Transfer assembly | REMOVAL | |
| 4WD indicator light remains on | 4WD indicator light circuit | 4WD INDICATOR LIGHT REMAINS ON |
| 4WD indicator light does not come on | 4WD indicator light circuit | 4WD INDICATOR LIGHT DOES NOT COME ON |
| The system is in the DTC output mode although terminals TC and CG of the DLC3 are not shorted | 1. TC and CG terminal circuit | TC AND CG TERMINAL CIRCUIT |
| 2. 4WD control ECU | - | |
| The system is not in the DTC output mode although terminals TC and CG of the DLC3 are shorted | 1. TC and CG terminal circuit | TC AND CG TERMINAL CIRCUIT |
| 2. 4WD control ECU | - | |
|
HINT: * Phenomenon of tight-corner braking |
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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.