Daihatsu F300 Service Manual page 1380

EFISYSTEM
TROUBLE SHOOTING
TROUBLE SHOOTING HINTS
1. In most cases, engine troubles are attributable to systems other than the EFI system.
Prior to starting the trouble shooting for the EFJ system, check other systems.
(1) Power supply
• Battery voltage
• Fuse blown
• Fusible link blown
(2) Body ground
(3) Fuel supply
• Fuel leakage
Fuel filter clogged
Fuel pump malfunctioning
(4) Ignition system
Spark plugs faulty
• Spark plug wires faulty
• Distributor and ignitor faulty
• Ignition coil faulty
(5) Air induction system
Air leakage
(6) Others
• Ignition timing adjusted improperly
Idle speed adjusted improperly
• Idle-up VSV malfunctioning
2. Most of troubles related to the EFI system are merely
caused
by
poor wire connections.
Ensure that connectors are connected securely.
Check connectors, being careful as to the following points.
(1) Visually inspect that terminals are not bent.
(2) Ensure that connectors are securely connected and
locked.
(3) Check to see
if
the malfunction phenomenon takes
place when applying light vibration to the connector or
the wire connected to the connector.
EF-12
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