GDI ± Troubleshooting
13A-15
INSPECTION PROCEDURE FOR DIAGNOSIS CODES
Code No.11 Oxygen sensor system Probable cause
Range of check
D 3 minutes have passed after engine was started.
D Engine coolant temperature is approx. 80°C or more.
D Intake air temperature is 20 ± 50°C.
D Engine speed is approx. 2,000 ± 3,000 r/min.
D Vehicle is moving at constant speed on a flat, level road surface.
Set conditions
D The oxygen sensor output voltage is around 0.6 V for 30 seconds (does
not cross 0.6 V for 30 seconds).
D When the range of check operations given above which accompany starting
of the engine are carried out four time in succession, a problem is detected
after each operation.
D Malfunction of the oxygen sensor
D Improper connector contact, open circuit or
short-circuited harness wire
D Malfunction of the engine-ECU
NG
Repair
OK
Replace the engine-ECU.
NG
OK
Check trouble symptom.
OK
Check the following connector: C-19
NG
Check the harness wire between the engine-
ECU and the oxygen sensor connector.
OK
Check trouble symptom.
OK
Measure at the oxygen sensor connector A-67.
D Disconnect the connector, and measure at the
harness side.
(1) Voltage between 1 and earth (Ignition switch: ON)
OK: System voltage
(2) Continuity between 2 and earth
OK: Continuity
(1) NG
Check the following connectors: A-36,
C-19
Check the oxygen sensor. (Refer to P.13A-105.)
NG
Replace
(2) NG
Check the harness wire between the oxygen
sensor and the engine control relay connector,
and repair if necessary.
NG
Repair
Measure at the engine-ECU connector C-29.
D Disconnect the connector, and measure at the
harness side.
D Voltage between 89 and earth (Ignition switch: ON)
OK: System voltage
Repair
NG
Check the harness wire between the engine-
ECU and the oxygen sensor connector, and
repair if necessary.
OK
Check trouble symptom.
Check the following connectors: A-67
OK
NG
Replace
Check the harness wire between the engine-ECU and
the oxygen sensor connector.
Replace the engine-ECU.
NG
OK
NG
Replace
NG
NG
Check trouble symptom.
NG
OK
Check the following connector: A-36
Repair
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