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Main 12 Causes of Overheating Engine Step Inspection item Equipment Condition Reference page OFF 1 I Blocked radiator I Blocked radiator grille I Blocked bumper I Visual No blocking — 2 I Coolant mixture I Coolant tester 50 - 50% coolant mixture See MA section, “RECOM- 3 I Coolant level I Visual Coolant up to MAX level in See LC section, “Changing 4 I Radiator cap I Pressure tester 78 - 98 kPa (0.78 - 0.98 2, 11 - 14 psi) See LC section, “System ON* 2 5 I Coolant leaks I Visual No leaks See LC section, “System ON* 2 6 I Thermostat I Touch the upper and Both hoses should be hot See LC section, “Thermo- ON* 1 7 I Cooling fan I CONSULT-II Operating See Trouble Diagnosis for OFF 8 I Combustion gas leak I Color checker chemical Negative — ON* 3 9 I Coolant temperature I Visual Gauge less than 3/4 when — I Coolant overflow to res- I Visual No overflow during driving See LC section, “Changing OFF* 4 10 I Coolant return from res- I Visual Should be initial level in See LC section, “REFILL- OFF 11 I Cylinder head I Straight gauge feeler 0.1 mm (0.004 in) Maxi- See EM section, “Inspec- 12 I Cylinder block and pis- I Visual No scuffing on cylinder See EM section, “Inspec- *1: Turn the ignition switch ON. DTC P1217 OVER HEAT TD27Ti EC-425 |