Yamaha MTN850-A 2017 Service Manual page 546

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
EAS31795
SELF-DIAGNOSTIC FUNCTION TABLE (FOR IMMOBILIZER SYSTEM)
TIP
For details of the fault code, refer to "SELF-DIAGNOSIS FAULT CODE INDICATION" on page 8-115.
Fault
code No.
51 Immobilizer unit: Code cannot be transmitted between the key and the immobilizer unit.
52 Immobilizer unit: Codes between the key and immobilizer unit do not match.
53 Immobilizer unit: Codes cannot be transmitted between the ECU and the immobilizer unit.
54 Immobilizer unit: Codes transmitted between the ECU and the immobilizer unit do not match.
55 Immobilizer unit: Key code registration malfunction.
56 ECU: Unidentified code is received.
EAS31119
COMMUNICATION ERROR WITH THE METER
Fault
code No.
U0155 CAN communication
(Yamaha error (with the meter)
diagnostic
tool)
Err (multi-
function
meter dis-
play)
EAS31120
DIAGNOSTIC CODE: SENSOR OPERATION TABLE
Diagnostic
code No.
01 Throttle position sensor sig-
nal 1
• Fully closed position
• Fully open position
03 Intake air pressure 1
04 Intake air pressure 2
Probable cause of
Item
malfunction
Communication
between the ECU and
the meter is not possi-
ble
• Defective meter cou-
pler and ECU cou-
pler
• Open or short cir-
cuit in the wire har-
ness between the
meter and the ECU
• Defective meter
• Defective ECU
Item
Item
Vehicle symptom
Defective meter dis-
play.
Traction control does
not work.
Tool display
11–21
96–106
Displays the intake air pres-
sure.
Displays the intake air pres-
sure.
9-13
Fail-safe system
operation
Grip warmer output:
OFF is fixed.
MAP changeover:
State is fixed.
Traction control does
not work.
Meter switch input:
OFF is fixed.
Procedure
Check with throttle valves
fully closed.
Check with throttle valves
fully open.
Operate the throttle while
pushing the " " side of the
start/engine stop switch. (If
the display value changes,
the performance is OK.)
Operate the throttle while
pushing the " " side of the
start/engine stop switch. (If
the display value changes,
the performance is OK.)