Inspection Of Air Injectors; Inspection Of Fuel Injectors; Inspection Of Mat Sensor (Manifold Temperature Sensor) (Option); Inspection Of Map Sensor (Manifold Absolute Air Pressure Sensor) (Option) - TOHATSU MD 70-90C2 Service Manual

Electrical System

17) 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.

18) Inspection of Fuel Injectors

This test can be made without removing parts.
1. Measure resistance between the terminals, and replace
fuel injector if the resistance is out of specified range.
Resistance between terminals : @20˚C (68˚F)
1.7 - 1.9 Ω
2. Apply 12V to the terminals to check if the part "clicks"
If not, replace fuel injector.
19) Inspection of MAT sensor (Manifold
Temperature Sensor) (Option)
This test can be made without removing parts.
1. Measure MAT sensor resistance. Replace if other than
specified value.
MAT (Manifold
Temperature (Reference Value) :
2.35 - 2.55kΩ at 20˚C (68˚F)
0.30 - 0.35kΩ at 80˚C (176˚F)
20) Inspection of MAP Sensor (Manifold
Absolute Air Pressure Sensor) (Option)
This test can be made without removing parts.
Apply 5V between terminals b and c, and measure
1.
output voltage between terminals a and b.
Replace MAP sensor if the output voltage is out of
specified range.
Output Voltage between a and b : @25˚C
(77˚F) and atmospheric pressure
3.1 - 4.6V
8-16
Temperature) Sensor
12V
c
b
a
TLDI 75/90C2 2010