EN(H4DOSTC)-246
ENGINE (DIAGNOSTICS)
GENERAL DIAGNOSTIC TABLE
18.General Diagnostic Table
A: INSPECTION
1. ENGINE
NOTE:
Malfunction of parts other than those listed is also possible. <Ref. to ME(H4DOSTC)-90, Engine Trouble in
General.>
Symptom
Problem parts
1. Engine does not start. (internal combustion
does not occur.)
1) ECM power supply
2) Engine ground terminal
3) Crankshaft position sensor
4) Camshaft position sensor
5) Fuel pump
6) Pressure regulator
7) Ignition coil & ignitor
8) Spark plug
9) Fuel injector
2. Engine does not start. (internal combustion
occurs.)
1) ECM power supply
2) Spark plug
3) Engine coolant temperature sensor
4) Pressure regulator
5) Pressure sensor
6) Fuel pump
7) Fuel injector
8) Camshaft position sensor
9) Crankshaft position sensor
10) Idle air control solenoid valve
3. Engine does not start. (engine stalls after inter-
nal combustion.)
1) ECM power supply
2) Pressure sensor
3) Engine coolant temperature sensor
4) Spark plug
5) Ignition coil
6) Fuel pump
7) Pressure regulator
8) Fuel injector
9) Idle air control solenoid valve
4. Engine stalls during idling.
1) Idle air control solenoid valve
2) Pressure sensor
3) Mass air flow and intake temperature sensor
4) Ignition parts (*1)
5) Engine coolant temperature sensor (*2)
6) Crankshaft position sensor (*3)
7) Camshaft position sensor (*3)
8) Fuel injection parts (*4)
5. Rough idling
1) Idle air control solenoid valve
2) Pressure sensor
3) Mass air flow and intake temperature sensor
4) Engine coolant temperature sensor (*2)
5) Ignition parts (*1)
6) Air intake system (*5)
7) Fuel injection parts (*4)
8) Throttle position sensor
9) Crankshaft position sensor (*3)
10) Camshaft position sensor (*3)
11) Oxygen sensor
12) Fuel pump and fuel pump relay