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Problem Symptoms Table

HINT:

When a malfunction is not confirmed by a DTC (Diagnostic Trouble Code) check and the cause of problem cannot be identified through a basic inspection, troubleshoot according to the priority order indicated in the table below.

SFI SYSTEM: 

SFI SYSTEM SYMPTOM CHART

Symptom Suspected Area See page
Engine does not crank (does not start) Immobilizer system (w/ Smart Key System) HOW TO PROCEED WITH TROUBLESHOOTING
Immobilizer system (w/o Smart Key System) HOW TO PROCEED WITH TROUBLESHOOTING
Starter INSPECTION
STARTER relay STARTER RELAY
Cranking holding function circuit (w/ Smart Key System) CRANKING HOLDING FUNCTION CIRCUIT
Starter signal circuit (w/o Smart Key System) STARTER SIGNAL CIRCUIT
No initial combustion (does not start) ECM power source circuit ECM POWER SOURCE CIRCUIT
Ignition system ON-VEHICLE INSPECTION
Fuel pump control circuit FUEL PUMP CONTROL CIRCUIT
Fuel injector INSPECTION
VC output circuit VC OUTPUT CIRCUIT
ECM -
Difficult to start (engine cranks normally) Electronic throttle control system DTC P2102 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT LOW; DTC P2103 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT HIGH
Fuel pump control circuit FUEL PUMP CONTROL CIRCUIT
Ignition system ON-VEHICLE INSPECTION
Spark plug ON-VEHICLE INSPECTION
Compression ENGINE
Fuel injector INSPECTION
VC output circuit VC OUTPUT CIRCUIT
Difficult to start with cold engine Electronic throttle control system DTC P2102 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT LOW; DTC P2103 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT HIGH
Fuel pump control circuit FUEL PUMP CONTROL CIRCUIT
Spark plug ON-VEHICLE INSPECTION
Ignition system ON-VEHICLE INSPECTION
Fuel injector INSPECTION
Engine coolant temperature sensor ENGINE COOLANT TEMPERATURE SENSOR
Difficult to start with hot engine Electronic throttle control system DTC P2102 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT LOW; DTC P2103 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT HIGH
Fuel pump control circuit FUEL PUMP CONTROL CIRCUIT
Spark plug ON-VEHICLE INSPECTION
Ignition system ON-VEHICLE INSPECTION
Fuel injector INSPECTION
Engine coolant temperature sensor ENGINE COOLANT TEMPERATURE SENSOR
High engine idle speed (poor idling) Electronic throttle control system DTC P2102 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT LOW; DTC P2103 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT HIGH
ECM power source circuit ECM POWER SOURCE CIRCUIT
A/C signal circuit (Compressor circuit) -
Acoustic control induction system ACIS CONTROL CIRCUIT
PCV hose EMISSION CONTROL SYSTEM
ECM -
Low engine idle speed (poor idling) Electronic throttle control system DTC P2102 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT LOW; DTC P2103 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT HIGH
ECM power source circuit ECM POWER SOURCE CIRCUIT
A/C signal circuit (Compressor circuit) -
Acoustic control induction system ACIS CONTROL CIRCUIT
PCV hose EMISSION CONTROL SYSTEM
Fuel injector INSPECTION
ECM -
Rough idling (poor idling) Electronic throttle control system DTC P2102 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT LOW; DTC P2103 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT HIGH
Fuel injector INSPECTION
Ignition system ON-VEHICLE INSPECTION
Compression ENGINE
Fuel pump control circuit FUEL PUMP CONTROL CIRCUIT
Spark plug ON-VEHICLE INSPECTION
Acoustic control induction system ACIS CONTROL CIRCUIT
PCV hose EMISSION CONTROL SYSTEM
Hunting (poor idling) Electronic throttle control system DTC P2102 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT LOW; DTC P2103 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT HIGH
ECM power source circuit ECM POWER SOURCE CIRCUIT
Fuel pump control circuit FUEL PUMP CONTROL CIRCUIT
Spark plug ON-VEHICLE INSPECTION
Ignition system ON-VEHICLE INSPECTION
Fuel injector INSPECTION
Acoustic control induction system ACIS CONTROL CIRCUIT
PCV hose EMISSION CONTROL SYSTEM
Hesitation/Poor acceleration (poor driveability) Fuel injector INSPECTION
Fuel pump control circuit FUEL PUMP CONTROL CIRCUIT
Ignition system ON-VEHICLE INSPECTION
Spark plug ON-VEHICLE INSPECTION
Air intake control system ACIS CONTROL CIRCUIT
A/T faulty (U151E) SYSTEM DESCRIPTION
A/T faulty (U151F) SYSTEM DESCRIPTION
Surging (poor driveability) Fuel pump control circuit FUEL PUMP CONTROL CIRCUIT
Spark plug ON-VEHICLE INSPECTION
Ignition system ON-VEHICLE INSPECTION
Fuel injector INSPECTION
Engine stalls soon after starting Fuel pump control circuit FUEL PUMP CONTROL CIRCUIT
Electronic throttle control system DTC P2102 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT LOW; DTC P2103 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT HIGH
Crankshaft position sensor CRANKSHAFT POSITION SENSOR
Spark plug ON-VEHICLE INSPECTION
Ignition system ON-VEHICLE INSPECTION
Fuel injector INSPECTION
Engine stalls during A/C operation A/C signal circuit (Compressor circuit) -
ECM -
Unable/difficult to refuel Refueling valve (canister) -
Engine vibrates frequently when idling (Active Control) Active control engine mount circuit ACTIVE CONTROL ENGINE MOUNT SYSTEM