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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 891 (Engine Control System (Diagnostic Codes & Symptom Tests)) >> DTC/Circuit Diagnosis >> DTC P1217: Engine Over Temperature >> Main 13 Causes of Overheating

Main 13 Causes of Overheating

WARNING: This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.
Engine Step Inspection item Equipment Standard
OFF 1
  • Blocked radiator
  • Blocked condenser
  • Blocked radiator grille
  • Blocked bumper
  • Visual
 No blocking
2
  • Coolant mixture
  • Coolant tester
 50 - 50% coolant mixture
3
  • Coolant level
  • Visual
 Coolant up to MAX level in reservoir tank and radiator filler neck
4
  • Reservoir tank cap
  • Pressure tester
 95 - 125 kPa (0.97 - 1.28 kg/cm2 , 14 - 18 psi) (Limit)
ON(2) 5
  • Coolant leaks
  • Visual
 No leaks
ON(2) 6
  • Thermostat
  • Touch the upper and lower radiator hoses
 Both hoses should be hot
ON(1) 7
  • Cooling fan
  • CONSULT 
 Operating
OFF 8
  • Combustion gas leak
  • Color checker chemical tester 4 Gas analyzer
 Negative
ON(3) 9
  • Coolant temperature gauge
  • Visual
 Gauge less than 3/4 when driving
  • Coolant overflow to reservoir tank
  • Visual
 No overflow during driving and idling
OFF(4) 10
  • Coolant return from reservoir tank to radiator
  • Visual
 Should be initial level in reservoir tank
OFF 11
  • Water control valve
  • Remove and inspect the valve
 Within the specified value
OFF 12
  • Cylinder head
  • Straight gauge feeler gauge
 0.1 mm (0.004 in) Maximum distortion (warping)
13
  • Cylinder block and pistons
  • Visual
 No scuffing on cylinder walls or piston
(1) Turn the ignition switch ON.
(2) Engine running at 3, 000 RPM for 10 minutes.
(3) Drive at 90 km/h (55 MPH) for 30 minutes and then let idle for 10 minutes.
(4) After 60 minutes of cool down time.

For more information, refer to "TROUBLESHOOTING CHART ".

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