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8 CHECK INTERMITTENT INCIDENT
1. Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-144.
© INSPECTION END
Main 12 Causes of Overheating
NHEC0561
Engine Step Inspection item Equipment Standard Reference page
OFF 1 I Blocked radiator
I Blocked condenser
I Blocked radiator grille
I Blocked bumper
I Visual No blocking —
2 I Coolant mixture I Coolant tester 50 - 50% coolant mixture See MA-11, “RECOM-
MENDED FLUIDS AND
LUBRICANTS”.
3 I Coolant level I Visual Coolant up to MAX level
in reservoir tank and
radiator filler neck
See MA-14, “Changing
Engine Coolant”.
4 I Radiator cap I Pressure tester 59 - 98 kPa
(0.6 - 1.0 kg/cm
2
,9-14
psi) (Limit)
See LC-10, “System
Check”.
ON*
2
5 I Coolant leaks I Visual No leaks See LC-10, “System
Check”.
ON*
2
6 I Thermostat I Touch the upper and
lower radiator hoses
Both hoses should be
hot
See LC-15, “Thermostat”
and LC-17, “Radiator”.
ON*
1
7 I Cooling fan I CONSULT-II Operating See trouble diagnosis for
DTC P1217 (EC-489).
OFF 8 I Combustion gas leak I Color checker chemi-
cal tester 4 Gas ana-
lyzer
Negative —
ON*
3
9 I Coolant temperature
gauge
I Visual Gauge less than 3/4
when driving
—
I Coolant overflow to
reservoir tank
I Visual No overflow during driv-
ing and idling
See MA-14, “Changing
Engine Coolant”.
OFF*
4
10 I Coolant return from
reservoir tank to radia-
tor
I Visual Should be initial level in
reservoir tank
See MA-13, “ENGINE
MAINTENANCE”.
OFF 11 I Cylinder head I Straight gauge feeler
gauge
0.1 mm (0.004 in) Maxi-
mum distortion (warping)
See EM-41, “Inspection”.
12 I Cylinder block and pis-
tons
I Visual No scuffing on cylinder
walls or piston
See EM-61, “Inspection”.
*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 LC-22, “OVERHEATING CAUSE ANALYSIS”.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1217 ENGINE OVER TEMPERATURE (OVERHEAT)
Diagnostic Procedure (Cont’d)
EC-505
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