54-36
Service standards
• Turn the starter switch to OFF.
• Connect a check lamp to the glow plug.
• Remove the water temperature sensor from the engine, and
close the sensor mounting hole with the plug (M16 × 1.5 mm).
• Connect the extension harness between the water temperature
sensor and connector.
• Place the water temperature sensor in a container of water.
• Conduct the following test while changing the temperature of
water in the container. If anything abnormal is found, check rele-
vant components.
(1) Pre-glow time checking
• Turn the starter switch to ON (without starting the engine) and
confirm that the pre-glow time or check lamp ON time at each
water temperature conform with standard values.
(2) After-glow time checking
• Start the engine and measure the check lamp ON time to en-
sure that the after-glow time conforms with the standard val-
ue.
Location Maintenance item Standard value Limit Remedy
–
Coolant
temperature
Pre-glow
time
60°C or higher No pre-glow operation –
Inspect
0 or 60°C About 12 seconds –
0°C or below About 20 seconds –
After-glow
time
0°C or higher No after-glow operation –
0°C or below About 168 seconds –
#955 INSPECTION OF PREHEATING SYSTEM
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