TOHATSU MD 30B2 Service Manual page 292

Electrical System
12) Inspection of Throttle Position Sensor
This test can be made without removing parts.
1. Measure resistance between terminals.
Replace throttle position sensor if the resistance is out of
specified range.
When lever is at position A (wide open throttle) :
Between a - c
Between e - g
Between a - b : 4 - 5 kΩ e - f : 0.5 - 1 kΩ
When lever is at position B (fully closed throttle) :
Between a - c
Between e - g
Between a - b : 0.5 - 1 kΩ e - f : 4 - 5 kΩ
13) Inspection of Water Temperature Sensor
Remove the part and test it as a separate unit.
1. ***
2. Put water temperature sensor in the water, and warm up
water slowly.
3. Measure water temperature sensor resistance. Replace if
other than specified value.
Water Temperature Sensor Resistance
(Reference Value) :
1.026 - 1.254 kΩ at 40˚C (104 ˚F)
0.144 - 0.176 kΩ at 100˚C (212 ˚F)
14) Inspection of Air Injectors
This test can be made without removing parts.
1. Measure resistance between terminals.
Replace air injector if the resistance is out of specified
range.
Resistance between terminals : @20˚C (68 ˚F)
1.2 - 1.4 Ω
2. Apply 12V to the terminals to check if the part "clicks".
If not, replace air injector.
8-10
: 4 - 6 kΩ
: 4 - 6 kΩ
f
g
A B
e
a
b
c
12V
TLD D30/40/50B2 2013