Inspection Of Fuel Feed Pump (Ffp); Inspection Of Ptt Solenoid - TOHATSU MD 70-90C2 Service Manual

Electrical System
24）Inspection of Fuel Feed Pump (FFP).
・This test can be performed without removing
parts.
・Fuel feed pump (FFP) operates approximately
2 seconds when main switch is set to "ON".
1. Check that fuel feed pump (FFP) operation noise is heard. If
no noise is heard, check fuel system.

25) Inspection of PTT Solenoid

This test can be made without removing parts.
1. Disconnect positive and negative cables from battery.
Disconnect PTT leads from terminals 1 and 2.
2.
3. Check electrical conductivity of PTT solenoid. Replace if
other than specified value.
PTT Solenoid Conductivity
Sky Blue (Sb) -Black (B)
Pink (P) -Black (B)
Terminal 1 - Terminal 4 (-)
Terminal 2 - Terminal 4 (-)
Terminal 1 - Terminal 3 (+)
Terminal 2 - Terminal 3 (+)
Connect circuit tester leads between terminals 1 and 3
4.
of PTT solenoid.
As shown in diagram ∫, connect sky blue (Sb) terminal to
5.
positive battery terminal, and black (B) lead wire to
negative battery terminal.
Check electrical conductivity between terminals 1 and 3.
6.
If non conductive, replace UP side PTT solenoid.
Connect circuit tester leads between terminals 2 and 3
7.
of PTT solenoid.
As shown in diagram ç, connect pink (P) terminal to
8.
positive battery terminal, and black (B) lead wire to
negative battery terminal.
Check electrical conductivity between terminals 2 and 3.
9.
If non conductive, replace DOWN side PTT solenoid.
8-18
Conductive
Conductive
No Conductivity
å
DOWN
B
4
3
P
Sb
∫
B
- +
Sb
ç
DOWN
B
3
- +
P
UP
4
2
1
3
UP
1
3
2
TLDI 75/90C2 2010