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Problem Symptoms Table

WARNING: This page is about a different car, the 2004 Toyota 4Runner and 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

Use the table below to help you 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.

SYMPTOM CHART

Symptom Suspect Area See page
Noise
  1. Oil (Level low)
  2. Oil (Wrong)
  3. Transfer faulty
TRANSFER OIL 
TRANSFER OIL 
TRANSFER ASSY (VF4AM) 
Oil leakage
  1. Oil (Level too high)
  2. Gasket (Damaged)
  3. Oil seal (Worn or damaged)
  4. O-ring (Worn or damaged)
TRANSFER OIL 
TRANSFER ASSY (VF4AM) 
TRANSFER ASSY (VF4AM) 
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
  2. Differential lock switch
  3. Wire harness
  4. Four wheel drive control ECU
INSPECTION 
INSPECTION 
-
INSPECTION 
Shift from 4WD (L4) to 4WD (H4) impossible
  1. Four wheel drive control switch
  2. Differential lock switch
  3. Wire harness
  4. Four wheel drive control ECU
INSPECTION 
INSPECTION 
-
INSPECTION 
Shift from 2WD (H2) to 4WD (H4) impossible
  1. Four wheel drive control switch
  2. Wire harness
  3. Four wheel drive control ECU
INSPECTION 
-
INSPECTION 
Shift from 4WD (H4) to 2WD (H2) impossible
  1. Four wheel drive control switch
  2. Wire harness
  3. Four wheel drive control ECU
INSPECTION 
-
INSPECTION 
Shift from 2WD (H2) to 4WD (L4) impossible
  1. Four wheel drive control switch
  2. Differential lock switch
  3. Wire harness
  4. Four wheel drive control ECU
INSPECTION 
INSPECTION 
-
INSPECTION 
Shift from 4WD (L4) to 2WD (H2) impossible
  1. Four wheel drive control switch
  2. Differential lock switch
  3. Wire harness
  4. Four wheel drive control ECU
INSPECTION 
INSPECTION 
-
INSPECTION 


Use the table below to help you 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.

SYMPTOM CHART

Symptom Suspect Area See page
Noise
  1. Oil (Level low)
  2. Oil (Wrong)
  3. Transfer faulty
TRANSFER OIL 
TRANSFER OIL 
TRANSFER ASSY (VF4BM) 
Oil leakage
  1. Oil (Level too high)
  2. Gasket (Damaged)
  3. Oil seal (Worn or damaged)
  4. O-ring (Worn or damaged)
TRANSFER OIL 
TRANSFER ASSY (VF4BM) 
TRANSFER ASSY (VF4BM) 
TRANSFER ASSY (VF4BM) 
Tight corner braking Center differential or transfer faulty TRANSFER ASSY (VF4BM) 
Shift from 4WD (H4) to 4WD (L4) impossible
  1. Four wheel drive control switch
  2. Wire harness
  3. Four wheel drive control ECU
INSPECTION 
-
INSPECTION 
Shift from 4WD (L4) to 4WD (H4) impossible
  1. Four wheel drive control switch
  2. Wire harness
  3. Four wheel drive control ECU
INSPECTION 
-
INSPECTION