4-6
a. Single coil solenoid -- for Supra 950Mt
Coil is energized when
speed relay is energized.
Duringstartsequencehold coil is energized.When
starter is engaged pull coil is energized. After
engine start (max 10s) -- stater disengaged -- pull
coil is de-energized. Hold coil is kept energized.
b. Dual coil solenoid -- for Supra 750/850Mt
Solenoid is composed of two coils :
--
Pull coil
: high force used to move the plunger
--
Hold coil
: lower consumption - low force used to
maintain the plunger/lever in its position.
When speed relay is energized, pull and hold coil are
energized.Afterless than 1s thepullcoil timermodule
de-energized the pull coil, hold coil maintained ener-
gized.
Pull coil timer module
PCTM
Coil is energized when run
relay is energized.
Current
draw
'
8 amps
4.3.5
Engine air cleaner
a. Inspection
Theoiltypeair cleaner, hose andconnections should
be inspected for leaks or fractures in the inlet and outlet
hoses. A damaged air cleaner or hose can seriously
affect the performance and life of the engine. If housing
has been dented or damaged, check all connections
immediately.
b. Service Procedure (dry type)
Stop engine, remove air filter. Install new air filter.
4.3.6
Servicing fuel pump
a. To check or to replace
1. Remove 3 screws from cover (item 1, Figure 4-4).
2. Remove cover, gasket and filter.
3. Wash filter in cleaning solvent and blow out with air
pressure. Clean cover.
WARNING
Protect carefully your eyes from
solvent.
4. To install reverse above steps.
1. Fuel pump
2. Filter
3. Gasket
4. Cover
4.
3.
2.
1.
Figure 4-4 Electric fuel pump
b. Verify fuel pump capability
1. Remove fuel pump from the system. Connect the
manometer to pump outlet. Energize fuel pump with
a small quantity of fuel.
2. At zero flow, the fuel pump should provide about 0.7
bars of pressure at the pump outlet.
3. When running correctly the fuel pump generates
noise according to pulsation of the inner piston.