Toyota 8FDU15, Manual

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3-13
z
<DOES NOT START> STARTING MOTOR TURNS OVER BUT ENGINE DOES NOT START
Probable cause
• Ignition system defect (When combustion does not start)
• Fuel system defect (When combustion does start, but does not continue.)
• Regulator primary pressure abnormality during cranking (When the pressure is high there is a possibility of rich
air-fuel ratio)
Note:
When low vapour pressure LPG fuel is used in winter, engine may stall when longer idling or while traveling
and be difficult to start immediately afterwards. In this case pour warm water over the LPG regulator to
vaporize the fuel, and at the same time turn the LPG switch OFF to stop the fuel supply momentarily and
crank after fully opening the accelerator.
Inspect the ignition system.
(Refer to parts inspection and
adjustment 10, 11, 12, 13)
Inspect LPG injector piping internal pressure
(1) Disconnect the fuel hose between the LPG regulator and the LPG
injector at the regulator side.
(2) Connect the SST to the LPG regulator, and inspect the pressure
during cranking.
SST 09820-23600-71
Standard: The pressure rises.
SST
Replace LPG filter
NG
OK
Replace main solenoid valve
OK
NG
Inspect ignition
Inspect LPG filter
Inspect main solenoid valve operating noise
Inspect the operation sound of the solenoid
valve when the ignition switch is turned ON.
Standard:
The valve makes an operation noise
Inspect the wire harness and
connectors to the main solenoid
valve. (Refer to the wiring
diagram at the back of the book)
Repair wire harness and
connectors
NG
OK
NG
OK
OK NG
Replace slow solenoid valve
OK
NG
Inspect slow solenoid valve operating noise
Inspect the operation sound of the solenoid
valve when the ignition switch is turned ON.
Standard:
The valve makes an operation noise
Inspect the wire harness and
connectors to the slow solenoid
valve. (Refer to the wiring
diagram at the back of the book)
Repair wire harness and
connectors
NG
OK
03.book 13 ページ ２００７年２月２２日 木曜日 午後４時４７分
LPG Device for 4Y-E Engine
Section 1.3.3