Mitsubishi MOTORS Space Runner 1998, Workshop Manual

Page: 154 / 1164

GDI <4G6> -
Troubleshooting
13A-36
Code No.89 Abnormal fuel pressure system Probable cause
Range of check
D Engine: Idling (during stoichio-feedback operation)
Set conditions
D Fuel injection correction value remains excessively low for ten seconds or more.
or
D Fuel injection correction value remains excessively high for ten seconds or more.
D Malfunction of the fuel pump (high pressure)
D Malfunction of the intake air temperature sensor
D Malfunction of the barometric pressure sensor
D Malfunction of the air flow sensor
D Malfunction of the engine-ECU
MUT-
II
Data list
13 Intake air temperature sensor. (Refer to P.13A-75.)
NG
Check the intake air temperature sensor system. (Refer to P.13A-
16, INSPECTION PROCEDURE FOR DIAGNOSIS CODE No.13.)
OK
MUT- II Data list
25 Barometric air temperature sensor. (Refer to P.13A-77.)
NG
Check the barometric air temperature sensor system. (Refer to
P.13A-22, INSPECTION PROCEDURE FOR DIAGNOSIS CODE
No.25.)
OK
MUT-
II
Data list
12 Air flow sensor. (Refer to P.13A-75.)
NG
Check the air flow sensor system. (Refer to P.13A-15, INSPECTION
PROCEDURE FOR DIAGNOSIS CODE No.12.)
OK
Replace the fuel pump (high pressure).
Code No.91 Electronic-controlled throttle valve system Probable cause
Range of check
D Ignition switch: ON
D Error in communication between the engine-ECU and throttle valve controller
Set conditions
D Output voltage of the throttle position sensor (2nd channel) fluctuates significantly
(approx. 1 V or more) from an expected value.
Range of check
D Ignition switch: ON
D Error in communication between the throttle valve controller and engine-ECU
Set conditions
D The throttle valve opening angle (voltage) which the engine-ECU requested of
the throttle valve controller is significantly different from output voltage of the (2nd
channel) throttle position sensor (approx. one volt).
D Short in communication line
D Malfunction of the engine-ECU
D Malfunction of the throttle valve controller
MUT- II Self-Diag code
Is any other diagnosis code than No.94 output?
Yes
Follow INSPECTION PROCEDURE FOR DIAGNOSIS CODE.
No
Check the harness wire between the throttle valve controller and
engine-ECU.
NG
Repair
OK
Replace the throttle valve controller.