9-70
P0030
For this check, also set the engine stop switch to “ON”.
3. Wire harness continuity.
• Disconnect the O
2
sensor coupler, ECU coupler and fuel injection system relay coupler.
• Open circuit check
Is the coupler condition normal?
YES
Go to step 3.
NO
a. Connect the coupler securely or 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 6, and complete the service.
NO
Start the engine, and then check the condition of the DTC.
Is it in the “Recovered” condition?
YES
Go to step 6, and complete the service.
NO
Go to step 3.
Between O
2
sensor coupler “1” and ECU cou-
pler “2”
black/green–black/green
Between O
2
sensor coupler “1” and fuel injec-
tion system relay coupler “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.
R
R/L
R/B L/Y
O
B/GY/R
B
R/BG/B
Y/W
B
Y/RR/L
BB
R/LL/Y
Y/W
R
R/L
B/G
Gy/G
B/L
3
2
1
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