Engine control unit and component
5-22
h. Turn the main switch or power switch
to OFF.
i. Connect the ETV coupler.
j. Connect the intake silencer to the ETV.
Checking the ETV motor relay
The ETV motor relay cannot be removed for
testing or replaced as a single unit because it
is a component part of the electrical manage-
ment box.
1. Check:
•ETV relay
a. Connect the YDIS to display “ETV re-
lay”.
b. Turn the main switch or power switch
to ON, and then check that “ON” is dis-
played for “ETV relay” on the YDIS
screen.
c. Remove the fuse cover.
d. Measure the input voltage between the
ETV relay fuse “a” and ground.
e. Turn the main switch or power switch
to OFF.
f. Install the fuse cover.
Checking the SPS
1. Check:
• SPS
a. Connect the YDIS to display “SPS”.
b. Operate the Digital Electronic Control
lever to measure the output voltage at
the F, N, and R positions.
c. Turn the main switch or power switch
to OFF, and then disconnect the SPS
coupler “a”.
d. Turn the main switch or power switch
to ON, and then measure the input volt-
age at the SPS coupler.
A. SPS 1
B. SPS 2
e. Turn the main switch or power switch
to OFF, and then connect the SPS cou-
pler.
Input voltage
5 V
Orange (Or)–Black (B)
Input voltage
12 V
ETV fuse “a”–Ground
SPS output voltage (reference data)
F 1.17 V
N 2.54 V
R 3.78 V
Input voltage
5 V
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