[C] Determining The Cause And Location Of The Malfunction; [C-1] Only The Abs Warning Light Does Not Come On When The Main Switch Is Set To "On; [C-2] Abs Warning Light And All Other Indicators Do Not Come On - Yamaha 2007 XP500 Service Manual

A. This example is the pattern which shows
malfunction code 12.
B. This example is the pattern which shows
malfunction code 21.
EAS15B3011

[C] DETERMINING THE CAUSE AND LOCATION OF THE MALFUNCTION

EAS15B3012
[C-1] ONLY THE ABS WARNING LIGHT DOES NOT COME ON WHEN THE MAIN SWITCH IS SET
TO "ON"
NOTE:
Check following the steps in sequence.
1. Visual check
Check the ABS fuse.
G
Determine the cause of the blown fuse and repair. Replace with a new fuse. (Refer to "CHECKING
THE FUSES" in chapter 3.)
Check the wire harness (ABS system circuit) couplers.
G
Check that the wire harness (ABS system circuit) couplers are securely connected.
Check the connection of the wire harness (ABS system circuit) to the ECU (ABS).
G
Check that the wire harness (ABS system circuit) is securely connected to the ECU (ABS).
2. Confirmation using the test coupler adaptor
Connect the test coupler adaptor to the test coupler. (Refer to "[B-5] ABS malfunction check using
G
the ABS self-diagnosis (present malfunction)".)
Ground the warning light terminal (white/red) of the test coupler adaptor or connect the warning light
G
terminal to the negative battery terminal.
If the ABS warning light comes on, the wire harness (ABS system circuit) may be disconnected.
If the ABS warning light does not come on, the ABS warning light lead may be disconnected or the
contact of the ABS warning light may be defective.
Remove the ECU (ABS) coupler and check the ECU (ABS) coupler and test coupler adaptor ends
G
of the white/red lead for continuity.
If there is continuity, the ECU (ABS) is defective. → Replace the ECU (ABS). (Refer to "[D-1] Main-
tenance of the ECU (ABS)".)
If there is no continuity, the warning light circuit in the wire harness (ABS system circuit) is defective.
Disconnection or short → Correct. (Refer to "CIRCUIT DIAGRAM".)
EAS15B3013

[C-2] ABS WARNING LIGHT AND ALL OTHER INDICATORS DO NOT COME ON

NOTE:
Check following the steps in sequence.
1. Check the power supply system.
Check that the battery is connected correctly.
G
ABS (ANTI-LOCK BRAKE SYSTEM) (XP500A)
8-82
C. Time (second)