Yamaha Fz6 N Service Manual

ABS (ANTI-LOCK BRAKE SYSTEM)
8-78
EAS27770
[D-1] MAINTENANCE OF THE ABS ECU
Removing the ABS ECU
1. Remove: ABS ECU “1”
NOTE:
When removing the ABS ECU, take care not to 
damage the ABS ECU or ABS ECU couplers.
2. Remove: ABS ECU coupler “1”
 ABS ECU coupler “2”
NOTE:
 Do not pull the ABS ECU leads to remove the ABS ECU couplers.
 Always press on the locks “3” to disconnect 
the ABS ECU couplers from the ABS ECU. Checking the ABS ECU
1. Check:
 Terminals “1” of the ABS ECU Cracks/damages  →...

ABS (ANTI-LOCK BRAKE SYSTEM)
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(Refer to [D-6] FINAL CHECK on page 8-104.)
ABS warning light goes on and the ABS condition
1.When the ABS warning light keeps going on → It works as a normal brake.
 Detecting the malfunction by means of  the ABS self diagnostic function.
2.Light goes on and off at the time of starting  → ABS operation is normal.
 ABS warning light goes on for 2 seconds every time  the main switch is turned on and goes off 
afterward.
 ABS warning lights go on while t he starter...

ABS (ANTI-LOCK BRAKE SYSTEM)
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[A] Malfunction check by the ABS warning light
[B] Detail check of malfunction
Results by self diagnosis are displayed by the multifunction display or a pocket tester according to 
the ECU’s operation.
[C] Supposing the malfunction cause and position
Find the malfunction cause by reasoning th e place and situation where it occurred.
[D] ABS system services
Execute the final check after disassembly and assembly.
WARNING
EWA14040
Perform the troubleshooting [A]  → [B]  →...

ABS (ANTI-LOCK BRAKE SYSTEM)
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EAS27810
BASIC PROCESS FOR TROUBLESHOOTING 

ABS (ANTI-LOCK BRAKE SYSTEM)
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NOTE:
Do not delete the malfunction code during the troubleshooting procedures. Be sure to delete it when 
the service is finished.
WARNING
EWA14050
Always execute the “final check” when the components related to ABS are checked and ser-
viced.
EAS27830
[A] ABS MALFUNCTION CHECK USING THE ABS WARNING LIGHT
Turn the main switch to “ON”. (Do not start the engine.)
1. The ABS warning light does not come on. [B-1]
2. The ABS warning light  remains on. [B-2]
3. The ABS...

ABS (ANTI-LOCK BRAKE SYSTEM)
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EAS4S81020
[B-3] THE ABS WARNING LIGHT FLASHES
NOTE:
Check the battery voltage before proceeding.
Check the test coupler located in the left inner panel (front cowling). Is the T/C terminal ground?
1. Yes  → Disconnect the grounding lead from the T/C terminal and install the protective cap onto 
the test coupler.
NOTE:
When the test coupler adaptor is connected to  test coupler, the T/C terminal is grounded.
2. No  → [C-3]
Arrangement and the function of test couplers
...

ABS (ANTI-LOCK BRAKE SYSTEM)
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2.ABS warning light flashes every 0.5 second for more than 6 seconds. → [C-4, C-5]
If the ABS warning light flashes every 0.5 second , the malfunction code of a past malfunction has 
not been stored in the memory of the ECU (ABS) . If a malfunction code is displayed on the multi-
function display, the ABS warning light flashes. Ma ke sure that the customer understands the pos-
sible conditions when the  ABS warning light comes on.
A. FZ6-N/FZ6-NA/FZ6-S/FZ6-SA
B....

ABS (ANTI-LOCK BRAKE SYSTEM)
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EAS27870
[B-5] MALFUNCTION CHECK BY THE ABS SELF DIAGNOSIS (PRESENT MALFUNCTION)
NOTE:
Before proceeding to read the part of “Arrangement and the function of test coupler”.
Remove the side cowling (right) and check the location of test coupler. Connect the test coupler 
adapter with the test coupler in order to ground the T/C terminal (sky-blue). (Figure-“A”)
Set the range of pocket tester to DC 20 V. Connect the negative (-) terminal of tester to the T/F ter-
minal...

ABS (ANTI-LOCK BRAKE SYSTEM)
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As an example, “10 digits/1 digit pattern” of tester reading is shown below.
EAS4S81021
[C] DETERMINING THE CAUSE AND LOCATION OF THE MALFUNCTION
EAS4S81022
[C-1] ONLY THE ABS WARNING LIGHT DOES NOT COME ON WHEN THE MAIN SWITCH IS 
SET TO “ON”
1. Confirmation using the test coupler adaptor
Connect the test coupler adapter to the test coupler.
NOTE:
Check following the steps in sequence.
1. Wire harness is short-circuited to GND between the ABS ECU and meter (ABS warning...

ABS (ANTI-LOCK BRAKE SYSTEM)
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2. Check that the main switch coupler is securely connected.
3. Check that the meter assembly coupler is securely connected. (Refer to ABS CONNECTOR 
LOCATION CHART on page 8-75.)
When these checks are finished, re turn to [A] and check the ABS again.
EAS4S81024
[C-3] ABS WARNING LIGHT FLASHES
1. When the warning light flashes “ON” for 0.25  seconds and “OFF” for 0.75 seconds, check the 
stop switch or 3-4), 5).
2. When the warning light flashes “ON” for 0.75  seconds...