Basic Process For Troubleshooting - Yamaha VMAX 2009 Service Manual

EAS27810

BASIC PROCESS FOR TROUBLESHOOTING

[A] Turn the main switch to
ON, and check the
ABS warning light.
[B-1] Does the ABS warning
light fail to come on?
No
[B-2] Does the ABS warning
light flash?
No
[B-3] Does the ABS warning
light remain on?
No
[B-4] Does the ABS warning
light come on for 2
seconds, then go off?
Yes
No malfunctions are
currently detected.
Connect the test coupler adapter
to the ABS test coupler, and then
check for past fault codes in the
multi-function display.
Are fault codes displayed in the
multi-function display?
TIP
Record any fault codes that are
displayed.
No
(ABS warning light is on for
0.5 second and off for 0.5 second.)
Cannot delete
Finished.
Yes
[C-1] Does only the ABS warning
light fail to come on?
No
[C-2] Do all indicator lights fail to
come on?
Yes
Yes
[B-5] Malfunctions are
currently detected.
Connect the test coupler
adapter to the ABS test coupler,
and then check for fault codes
in the multi-function display.
Are fault codes displayed in the
multi-function display?
TIP
Record any fault codes
•
that are displayed.
If there are any fault
•
codes for the fuel injection
system, those fault codes will
be displayed first.
Yes
Yes
[C-5] Diagnose by the fault
code.
[D-1] Delete the fault codes.
OK
[D-2] Delete function test.
ABS (ANTI-LOCK BRAKE SYSTEM)
The ABS warning light (LED) is defective.
•
The wire harness is grounded between the
•
Yes
ABS ECU and the meter assembly 1.
The meter assembly 1 circuit is defective.
•
The ABS ECU is defective.
•
The main switch is defective.
•
Yes
The battery voltage is low.
•
The main fuse is blown.
•
The meter assembly 1 circuit is open.
•
No
[C-3] Does the ABS warning
light remain on?
Yes
The ABS ECU fuse is blown.
•
The ABS ECU coupler is
•
disconnected or a coupler pin
is pulled out.
There is a break in the wire
•
harness between the main
switch and the ABS ECU.
The battery voltage is low.
•
There is a break in the wire
•
harness between the ABS
ECU and the meter assembly 1.
The meter assembly 1 circuit is
•
defective.
The hydraulic unit assembly is
•
defective.
Finished. Return to [A].
8-89
Return to [A].
Return to [A].
Is the test coupler
adapter connected
to the ABS test
No
coupler?
Disconnect the test
coupler adapter.
No
[C-4] The ABS warning
light flashes.
The T/C terminal
•
(green/yellow) of the
ABS test coupler is
grounded.
The meter assembly 1
•
circuit is defective.
Return to [A]. Return to [A].
Yes