Trouble symptom
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Probable cause
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Remedy
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Reference page
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Engine warning lamp
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The engine warning lamp does not illuminate right
after the ignition switch is turned the "ON" position
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- Failed engine warning lamp
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- Check the combination meter
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Refer to GROUP 54A - Combination Meter - Check Chart
for Trouble Symptoms 
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- Open circuit in combination meter circuit
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- Check the combination meter circuit
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Engine warning lamp
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The engine warning lamp remains illuminating and never goes
out
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- Failed engine control system
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- Check the output diagnosis code
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Refer to Inspection Chart for Diagnosis Code 
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- Short circuit in combination meter circuit
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- Check the combination meter
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Refer to GROUP 54A - Combination Meter - Check Chart
for Trouble Symptoms 
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- Check the combination meter circuit
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Starting
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Starting impossible (Starting not possible)
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- Failed engine control system
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- Check the output diagnosis code
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Refer to Inspection Chart for Diagnosis Code 
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- Check the fuel high pressure and fuel supply line, and
repair if necessary
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Refer to Inspection Procedure - Injector System , , , 
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- Contamination (water, kerosene, etc.) in fuel, and repair
if necessary
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Refer to Inspection Procedure - Glow System 
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- Failed compression pressure
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- Check the compression pressure
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Refer to GROUP 11A - On-vehicle Service - Compression Pressure
Check 
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Starting
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Poor start ability when engine is cold (Poor starting)
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- Failed engine control system
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- Check the output diagnosis code
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Refer to Inspection Chart for Diagnosis Code 
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- Check the fuel high pressure and fuel supply line, and
repair if necessary
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Refer to inspection Procedure - Injector System , , , 
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- Contamination (water, kerosene, etc.) in fuel, and repair
if necessary
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Refer to Inspection Procedure - Glow System 
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- Failed engine oil viscosity
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- Check the engine oil viscosity, and replace if necessary
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Starting
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Poor start ability when engine is both cold and warm (Poor starting)
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- Failed engine control system
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- Check the output diagnosis code
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Refer to Inspection Chart for Diagnosis Code 
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- Check the fuel high pressure and fuel supply line, and
repair if necessary
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-
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Refer to inspection Procedure - Injector System , , , 
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- Contamination (water, kerosene, etc.) in fuel, and repair
if necessary
|
-
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- Failed compression pressure
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- Check the compression pressure
|
Refer to GROUP 11A - On-vehicle Service - Compression Pressure
Check 
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Idling stability (Improper idling)
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Idle speed is low when engine is cold (Improper idling speed)
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- Failed engine control system
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- Check the output diagnosis code
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Refer to Inspection Chart for Diagnosis Code 
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Refer to Data List Reference Table 
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Refer to Actuator Test Reference Table 
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- Check the fuel high pressure and fuel supply line, and
repair if necessary
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Refer to Inspection Procedure - Injector System , , , 
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Idling stability (Improper idling)
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Idle speed is high (Improper idling speed)
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- Failed engine control system
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- Check the output diagnosis code
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Refer to Inspection Chart for Diagnosis Code 
|
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Refer to Data List Reference Table 
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Refer to Actuator Test Reference Table 
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- Check the fuel high pressure fuel supply line, and repair
if necessary
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Refer to Inspection Procedure - Injector System , , , 
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Idling stability (Improper idling)
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Idle speed is low (Improper idling speed)
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- Failed engine control system
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- Check the output diagnosis code
|
Refer to Inspection Chart for Diagnosis Code 
|
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Refer to Data List Reference Table 
|
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Refer to Actuator Test Reference Table 
|
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- Check the fuel high pressure and fuel supply line, and
repair if necessary
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Refer to Inspection Procedure - Injector System , , , 
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-
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Idling stability (Improper idling)
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Idle speed is unstable (Rough idling, hunting)
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- Failed engine control system
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- Check the output diagnosis code
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Refer to Inspection Chart for Diagnosis Code 
|
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Refer to Data List Reference Table 
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Refer to Actuator Test Reference Table 
|
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- Check the fuel high pressure and fuel supply line, and
repair if necessary
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-
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Refer to Inspection Procedure - Injector System , , , 
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- Contamination (water, kerosene, etc.) in fuel, and repair
if necessary
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-
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Refer to Inspection Procedure - Glow System 
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Idling stability (Engine stalls)
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Engine stops soon after starting
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- Failed engine control system
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- Check the output diagnosis code
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Refer to Inspection Chart for Diagnosis Code 
|
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Refer to Data List Reference Table 
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Refer to Actuator Test Reference Table 
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- Check the fuel high pressure and fuel supply line, and
repair if necessary
|
-
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Refer to Inspection Procedure - Injector System , , , 
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-
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Idling stability (Engine stalls)
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Engine stops during idling
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- Failed engine control system
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- Check the output diagnosis code
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Refer to Inspection Chart for Diagnosis Code 
|
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Refer to Data List Reference Table 
|
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Refer to Actuator Test Reference Table 
|
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- Check the fuel high pressure and fuel supply line, and
repair if necessary
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-
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Refer to Inspection Procedure - Injector System , , , 
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Driving
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Engine output is too low
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- Failed engine control system
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- Check the output diagnosis code
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Refer to Inspection Chart for Diagnosis Code 
|
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Refer to Data List Reference Table 
|
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Refer to Actuator Test Reference Table 
|
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- Check the fuel high pressure and fuel supply line, and
repair if necessary
|
-
|
|
Refer to Inspection Procedure - Injector System , , , 
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- Contamination (water, kerosene, etc.) in fuel, and repair
if necessary
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-
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- Check the boost pressure control system and turbocharger,
and repair if necessary
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- Failed compression pressure
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- Check the compression pressure
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Refer to GROUP 11A - On-vehicle Service - Compression Pressure
Check 
|
|
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-
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Driving
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Abnormal engine knocking occurs
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- Failed engine control system
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- Check the output diagnosis code
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Refer to Inspection Chart for Diagnosis Code 
|
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Refer to Data List Reference Table 
|
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Refer to Actuator Test Reference Table 
|
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- Check the fuel high pressure and fuel supply line, and
repair if necessary
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-
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Refer to Inspection Procedure - Injector System , , , 
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-
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Driving
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Abnormally black smoke
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- Failed engine control system
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- Check the output diagnosis code
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Refer to Inspection Chart for Diagnosis Code 
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Refer to Data List Reference Table 
|
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Refer to Actuator Test Reference Table 
|
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- Check the fuel high pressure and fuel supply line, and
repair if necessary
|
-
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Refer to Inspection Procedure - Injector System , , , 
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-
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- Check the boost pressure control system and turbocharger,
and repair if necessary
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- Failed air cleaner element
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- Check the air cleaner element, and replace if necessary
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- Catalytic converter deteriorated
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- Check the catalytic converter, and replace if necessary
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Driving
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Abnormally white smoke
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- Failed engine control system
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- Check the output diagnosis code
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Refer to Inspection Chart for Diagnosis Code 
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Refer to Data List Reference Table 
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Refer to Actuator Test Reference Table 
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- Oil loss via the piston ring
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- Check the piston ring, and replace if necessary
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- Oil loss via the valve guides
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- Check the valve guides, and replace if necessary
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Driving
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Hunting occurs while driving
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- Failed engine control system
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- Check the output diagnosis code
|
Refer to Inspection Chart for Diagnosis Code 
|
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Refer to Data List Reference Table 
|
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Refer to Actuator Test Reference Table 
|
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- Check the fuel high pressure and fuel supply line, and
repair if necessary
|
-
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Refer to Inspection Procedure - Injector System , , , 
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