3.1.13-22
CS35 2013.04
3.1.13-22Electronic Control System - ME7
Symptom Chart
If the fault occurs, but there is no DTC stored in the ECM for this fault, and can not confirm the cause,
then follow the procedure to diagnose the fault and eliminate it.
Symptom Possible Sources Action
Engine can not start at normal
start speed
• Crankshaft position sensor
• Fuel pump
• Ignition coil
• ECM
• Engine mechanical
• Immobilizer system
Refer to: Engine Can Not Start
in Normal Start Speed Diagno-
sis (3.1.13 Electronic Control
System - ME7, Symptom
Diagnosis and Testing).
Difficult cold start
• Water temperature sensor
•Spark plug
• Fuel pump
• Fuel Injector
• Throttle body
• Engine mechanical
• Engine control module (ECM)
circuit
Refer to: Cold Start Problem
Diagnosis (3.1.13 Electronic
Control System - ME7,
Symptom Diagnosis and
Testing).
Warm start problem
• Water temperature sensor
• Ignition coil
• Fuel pump
• Engine control module (ECM)
circuit
Refer to: Warm Start Problem
Diagnosis (3.1.13 Electronic
Control System - ME7,
Symptom Diagnosis and
Testing).
Normal start but unstable idle
speed at any time
• Air Intake system
•Spark plug
• Throttle body
• Ignition timing
• Engine mechanical
• Engine control module (ECM)
circuit
Refer to: Normal Start But
Unstable Idle Speed at Any
Time Diagnosis (3.1.13 Elec-
tronic Control System - ME7,
Symptom Diagnosis and
Testing).
Normal start but unstable idle
speed or flameout under partial
load
• A/C system
• Throttle body
• Fuel Injector
Refer to:
Refer to: Normal Start, Unsta-
ble Idling or Flameout With
Partial Load (Such as Open the
A/C) Diagnosiss (3.1.13 Elec-
tronic Control System - ME7,
Symptom Diagnosis and Test-
ing).
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