Yamaha YFM7FGPW Service Manual page 467

EPS (ELECTRIC POWER STEERING) SYSTEM
Identifying fault codes
When the diagnostic mode is activated, the fault codes determined by the fail-safe specifications are
signaled by the EPS warning light as follows.
• Present malfunction signaling mode: Currently detected fault codes are signaled.
• Past malfunction signaling mode: Both previously detected fault codes and currently detected
fault codes are signaled.
Signaling method
Example 1: Fault code No. 23
d
a
b
∗1
e
c f
a. EPS self-diagnosis signal connector
b. Diagnostic mode
c. EPS warning light
d. Disconnected
e. On
f. Off
*1 The EPS warning light comes on for 5 seconds during the diagnostic mode selection judgment.
*2 Display of the present malfunctions stops when the past malfunction display mode is selected.
After the mode selection judgment is completed (present or past malfunction mode), the current fault code
signaling stops immediately, and then the first code of the mode is signaled 2 seconds later.
When a fault code is signaled, the EPS warning light goes off for 1 second between the units of 10
and the units of 1 for the code. After a fault code is signaled, the warning light goes off for 3 sec-
onds, and then the next code is signaled.
Example 2: No malfunctions are detected
c
a
d
b e
a. EPS self-diagnosis signal connector
b. EPS warning light
c. Disconnected
d. Comes on.
*1 The EPS warning light comes on for 5 seconds during the diagnostic mode selection judgment.
After the mode selection judgment is completed (present display or past malfunction mode), the current fault
code signaling stops immediately, and then the EPS warning light starts flashing at 1.5-second intervals.
g
j
h
5 2 1
i
0.5 × 3
f
∗1
5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5
g
9 - 62
5
d
i
3 2
0.5 × 5
g. Grounded
h. Normal mode (diagnostic mode not activated)
i. Mode selection judgment
j. Present malfunction signaling mode
k. Past malfunction signaling mode
e. Goes off.
f. Grounded
g. Mode selection judgment
–
ELEC
g
k
∗2
+