Yamaha YZF-R1 2020 Service Manual page 620

Refer to "PARTS CONNECTED TO THE ECU" on page 9-3.
Ground short circuit check "A"
Between coolant temperature sensor coupler "1"
and ground
Between wire harness coupler (sub-wire harness
side) "3" and ground
Lines short circuit check "B"
Coolant temperature sensor coupler
Wire harness coupler (sub-wire harness side)
ECU coupler "4"
A
1
G/W B/L
Is resistance ∞ Ω?
YES
→ Go to step 5.
NO
a. Replace the wire harness and/or sub-wire harness.
b. Turn the main switch to "ON", and then check the condition of the DTC using the malfunction mode
of the YDT.
Is it in the "Recovered" condition?
YES
→ Go to step 8, and complete the service.
NO
→ Go to step 5.
5. Installed condition of coolant temperature sensor.
• Check for looseness or pinching.
Refer to "CYLINDER HEAD" on page 5-32.
Is check result OK?
YES
→ Go to step 6.
NO
3
B/L G/W
green/white–ground
green/white–ground
green/white–any other coupler terminal
black/blue–any other coupler terminal
green/white–any other coupler terminal
black/blue–any other coupler terminal
green/white–any other coupler terminal
black/blue–any other coupler terminal
B
1
G/W B/L
4
L/B Y/L
L/W B/Y
L/Y L/W
9-125
P0117, P0118
3
B/L G/W
P/W P V L L/R Gy
Gy/G Br/W B/L W W/B
Gy/Y G/W G Gy/B W/L