Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 373

13A-14
INSPECTION PROCEDURE FOR DIAGNOSIS CODES
Code No. 11 Oxygen sensor system
Range of check
3 minutes have passed after engine was started.
Engine coolant temperature is approx. 80_C or more.
Intake air temperature is 20 – 50_C.
Engine speed is approx. 2,000 – 3,000 r/min
Vehicle is moving at constant speed on a flat, level road surface
Set conditions
The oxygen sensor output voltage is around 0.6 V for 30 seconds (does not
cross 0.6 V for 30 seconds).
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.
Check the oxygen sensor. (Refer to P.13A-108.)
OK
Measure at the oxygen sensor connector A-55.
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
OK
Measure at the engine-ECU connector B-28.
Disconnect the connector, and measure at the
harness side.
Voltage between 6 and earth (Ignition switch: ON)
OK: System voltage
OK
Check the following connector: B-28
OK
Check trouble symptom.
NG
Check the harness wire between the engine-ECU and
the oxygen sensor connector.
OK
Replace the engine-ECU.
GDI –
Troubleshooting
NG
Replace
(1) NG
(2) NG
NG
NG
Repair
NG
Repair
Probable cause
Malfunction of the oxygen sensor
Improper connector contact,
short-circuited harness wire
Malfunction of the engine-ECU
Check the harness wire between the ox-
ygen sensor and the engine control relay
connector, and repair if necessary.
Check the following connector: B-31
OK
Check trouble symptom.
NG
Check the harness wire between the
engine-ECU and the oxygen sensor
connector.
OK
Replace the engine-ECU.
Check the following connector: A-55
OK
Check trouble symptom.
NG
Check the harness wire between the
engine-ECU and the oxygen sensor
connector, and repair if necessary.
open circuit or
NG
Repair
NG
Repair
NG
Repair