Problem Symptoms Table
WARNING: This page is about a different car, the 2006 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
Use PROBLEM SYMPTOMS TABLE to help find the cause of the problem. The numbers indicate the priority of the likely cause of the problem. Check each part in order.
If necessary, replace these parts.
PROBLEM SYMPTOMS TABLE
| Symptom | Suspected Area | Reference |
|---|---|---|
| Noise | 1. Oil (level low) | TRANSFER OIL |
| 2. Oil (wrong) | TRANSFER OIL | |
| 3. Transfer faulty | TRANSFER ASSY (VF4AM) | |
| Oil leakage | 1. Oil (level too high) | TRANSFER OIL |
| 2. Gasket (damaged) | TRANSFER ASSY (VF4AM) | |
| 3. Oil seal (worn or damaged) | TRANSFER ASSY (VF4AM) | |
| 4. O-ring (worn or damaged) | TRANSFER ASSY (VF4AM) | |
| Tight corner braking | Center differential or transfer faulty | OVERHAUL |
| Shift from 4WD (H4) to 4WD (L4) impossible | 1. Four wheel drive control switch | INSPECTION |
| 2. Differential lock switch | INSPECTION | |
| 3. Wire harness | - | |
| 4. Four wheel drive control ECU | INSPECTION | |
| Shift from 4WD (L4) to 4WD (H4) impossible | 1. Four wheel drive control switch | INSPECTION |
| 2. Differential lock switch | INSPECTION | |
| 3. Wire harness | - | |
| 4. Four wheel drive control ECU | INSPECTION | |
| Shift from 2WD (H2) to 4WD (H4) impossible | 1. Four wheel drive control switch | INSPECTION |
| 2. Wire harness | - | |
| 3. Four wheel drive control ECU | INSPECTION | |
| Shift from 4WD (H4) to 2WD (H2) impossible | 1. Four wheel drive control switch | INSPECTION |
| 2. Wire harness | - | |
| 3. Four wheel drive control ECU | INSPECTION | |
| Shift from 2WD (H2) to 4WD (L4) impossible | 1. Four wheel drive control switch | INSPECTION |
| 2. Differential lock switch | INSPECTION | |
| 3. Wire harness | - | |
| 4. Four wheel drive control ECU | INSPECTION | |
| Shift from 4WD (L4) to 2WD (H2) impossible | 1. Four wheel drive control switch | INSPECTION |
| 2. Differential lock switch | INSPECTION | |
| 3. Wire harness | - | |
| 4. Four wheel drive control ECU | INSPECTION |