Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 394

Code No.89 Abnormal fuel system
Range of check
Engine: Idling (during stoichio-feedback operation)
Set conditions
Fuel injection correction value remains excessively low for ten seconds or more.
or
Fuel injection correction value remains excessively high for ten seconds or more.
MUT-II Data list
13 Intake air temperature sensor. (Refer to P.13A-75.)
MUT-II Data list
25 Barometric air temperature sensor. (Refer to P.13A-76.)
MUT-II Data list
12 Air flow sensor. (Refer to P.13A-75.)
Replace the fuel pump (high pressure).
GDI –
OK
OK
OK
Troubleshooting
Probable cause
Malfunction of the fuel pump (high pressure)
Malfunction of the intake air temperature sensor
Malfunction of the barometric pressure sensor
Malfunction of the air flow sensor
Malfunction of the engine-ECU
NG
Check the intake air temperature sensor system. (Refer to P.13A-
16, INSPECTION PROCEDURE FOR DIAGNOSIS CODE 13.)
NG
Check the barometric air temperature sensor system. (Refer to
P.13A-22, INSPECTION PROCEDURE FOR DIAGNOSIS CODE
25.)
NG
Check the air flow sensor system. (Refer to P.13A-15, INSPEC-
TION PROCEDURE FOR DIAGNOSIS CODE 12.)
13A-35