Denso CRS - Other Malfunction Symptoms

Repair Section
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5.2 Other Malfunction Symptoms
Malfunctions caused by components other than the CRS
z There are occasions when a malfunction that appears to be generated by the CRS is actually caused by a different com-
ponent or system. For instance, engine mechanical parts and the fuel system may cause malfunction symptoms iden-
tical to symptoms generated by the CRS. When troubleshooting, do not simply assume that the source of a malfunction
is the CRS. Consider all causes should be exhaustively considered while verifying the list below.
Malfunction
Symptom
Faulty Item Cause Action
Insufficient
Power
Intake system Clogged air cleaner element Clean or replace the air cleaner element.
Fuel system
Air mixed with the fuel system Perform fuel system air bleeding.
Faulty fuel filter Replace the filter.
Insufficient fuel Add fuel and perform fuel system air
bleeding.
Improper fuel Switch to the correct fuel.
Engine
Compression pressure abnormality Refer to the engine repair manual.
Piston, cylinder liner and/or piston ring
Other Overheat
Faulty starting
Intake system Clogged air cleaner element Clean or replace the air cleaner element.
Fuel system
Insufficient fuel Add fuel and perform fuel system air
bleeding.
Improper fuel Replace the filter.
Fuel system clog Clean the fuel system.
Air introduction through fuel system con-
nection points
Tighten all connections.
Fuel filter clog Replace the fuel filter.
Loose injection piping connections Tighten connecting nuts.
Electrical sys-
tem
Faulty battery Check the battery.
Faulty starter wiring Replace the starter wiring.
Loose battery cables Tighten the battery terminal connections,
or replace the cables.
Faulty starting
Electrical sys-
tem
Faulty starter operation Replace the starter assembly.
Faulty glow plug system Replace the glow plugs.
Lubrication
system
Excessive engine oil viscosity Replace with oil of appropriate viscosity.
Engine
Burnt pistons Replace the piston, piston ring and cylin-
der liner.
Burnt bearings Replace the bearing and crankshaft.
Low compression pressure Overhaul the engine.
Other
Ring gear damage Replace the ring gear and/or starter pin-
ion gear.