9-141
P0638
3. Check the electronic throttle valve fuse.
4. Wire harness continuity.
• Disconnect the throttle servo motor coupler, ECU coupler and electronic throttle valve fuse.
• Open circuit check
• Short circuit check
Disconnect the ECU related connectors before checking.
Refer to “PARTS CONNECTED TO THE ECU” on page 9-3.
Is check result OK?
YES
Go to step 4.
NO
a. Replace the electronic throttle valve fuse.
b. Push the ON/start switch, 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 4.
Between throttle servo motor coupler “1” and
ECU coupler “2”
yellow/red–yellow/red
yellow/white–yellow/white
Between ECU coupler “2” and electronic throttle
valve fuse holder “3”
red/blue–red/blue
Is resistance 0 ?
YES
Go to “Short circuit check”.
NO
a. Replace the wire harness.
b. Push the ON/start switch, 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 “Short circuit check”.
O
B/GY/R
B
R/BG/B
Y/W
B
Y/RR/L
BB
R/LL/Y
Y/W
R
Y/R
Y/W
3 2
1
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