Yamaha MBK X-MAX 300 2017 Service Manual page 346

Fault code No.
Item
Tool display
Procedure
Probable cause of malfunc-
Item
tion and check
1 Connection of throttle body sen-
sor assembly coupler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins).
2 Connection of ECU coupler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins).
3 Wire harness continuity.
3-1
1. Throttle body sensor assembly
2. Intake air temperature sensor
3. ECU
4. Sensor output lead
5. Sensor ground lead
3-2 Disconnect the ECU coupler from the ECU.
Disconnect the throttle body sensor assembly coupler from the throttle body.
P0112, P0113
No normal signals are received from the intake air temperature sen-
sor.
[P0112] Intake air temperature sensor: ground short circuit detected.
[P0113] Intake air temperature sensor: open or power short circuit
detected.
When engine is cold: Displays temperature closer to air temperature.
When engine is hot: Air temperature + approx. 20 °C (68 °F).
Compare the actually measured air temperature with the tool display val-
ue.
Maintenance job
Improperly connected → Con-
nect the coupler securely or re-
place the wire harness.
Improperly connected → Con-
nect the coupler securely or re-
place the wire harness.
Open or short circuit → Replace
the wire harness.
1
L
Y
P/W
2
Br/W
B/L
8-41
FUEL INJECTION SYSTEM
Confirmation of service com-
Turn the main switch to "ON",
and then check the condition of
the fault code using the mal-
function mode of the Yamaha di-
agnostic tool.
Condition is "Recover" → Go to
item 7 and finish the service.
Condition is "Malfunction" → Go
to item 2.
Turn the main switch to "ON",
and then check the condition of
the fault code using the mal-
function mode of the Yamaha di-
agnostic tool.
Condition is "Recover" → Go to
item 7 and finish the service.
Condition is "Malfunction" → Go
to item 3.
Turn the main switch to "ON",
and then check the condition of
the fault code using the mal-
function mode of the Yamaha di-
agnostic tool.
Condition is "Recover" → Go to
item 7 and finish the service.
Condition is "Malfunction" → Go
to item 4.
3
5V
L
Y
P/W
5V
4
Br/W
B/L
5
pletion