Symptom Chart - Four-Wheel Drive Systems
| Condition | Possible Sources | Actions |
|---|---|---|
| Unable to duplicate customer concern; no DTC present | The concern description is inaccurate | CARRY OUT the AWD System Functional Test. GO to Pinpoint Test A |
| Vehicle has no or inadequate torque at rear wheels | Fuse Wiring, terminals or connectors Active Torque Coupling (ATC) solenoid AWD Relay Module PCM |
GO to Pinpoint Test D |
| Wheels/tires | Check wheels and tires for damage. REFER to: Wheels and Tires . | |
| Rear axle | Check rear axle for damage. REFER to: Rear Drive Axle and Differential . | |
| PTU mechanical failure | Check PTU for damage. REFER to: Rear Drive Axle and Differential . | |
| Vehicle binds in a turn or resists turning/pulsates or shudders in a straight line | Wheels/tires | Check wheels and tires for damage. REFER to: Wheels and Tires . |
| Wiring, terminals or connectors | GO to Pinpoint Test F | |
| Driveshaft | REFER to: Driveshaft . | |
| Wiring, terminals or connectors Active Torque Coupling (ATC) solenoid AWD Relay Module |
GO to Pinpoint Test F | |
| PTU mechanical failure | Check PTU for damage. REFER to: the appropriate Power Transfer Unit article. | |
| Driveshaft | Check the driveshaft for damage. REFER to: Suspension System . | |
| Wheel bearings | Check the wheel bearings for damage. REFER to: Suspension System . | |
| ABS | Check the ABS. | |
| Halfshafts | Check the rear halfshafts for damage. REFER to: Rear Drive Halfshafts . | |
| Tire/axle out of acceptable range | Wheels/tires ABS |
GO to Pinpoint Test C |