Mitsubishi MOTORS Space Runner 1998, Workshop Manual

Page: 130 / 1164

GDI <4G6> -
Troubleshooting
13A-12
Defective part or
function
What to do when a sensor is defective
Accelerator pedal
position sensor (1st
channel)
(1) Disables lean-mixture combustion.
(2) Controls the throttle valve position by using the accelerator pedal position sensor
(2nd channel) signal.
(3) Disables the electronic-controlled throttle valve system if the accelerator pedal position
sensor (2nd channel) signal is also defective, and holds the throttle valve at a
predetermined angle where the vehicle can be driven safely although its performance
is reduced.
Accelerator pedal
position sensor (2nd
channel)
(1) Disables lean-mixture combustion.
(2) Controls the throttle valve position by using the accelerator pedal position sensor
(1st channel) signal.
(3) Disables the electronic-controlled throttle valve system if the accelerator pedal position
sensor (1st channel) signal is also defective.
Electronic-controlled
throttle valve system
(1) Disables the electronic-controlled throttle valve system.
(2) Disables lean-mixture combustion.
(3) Disables idle engine speed feedback control.
Throttle valve position
feedback
(1) Disables the electronic-controlled throttle valve system.
(2) Disables lean-mixture combustion.
(3) Disables idle engine speed feedback control.
Throttle valve control
servo motor malfunc-
tion (1st phase)
Disables lean-mixture combustion.
Throttle valve control
servo motor malfunc-
tion (2nd phase)
(1) Disables the electronic-controlled throttle valve system.
(2) Disables lean-mixture combustion.
(3) Disables idle engine speed feedback control.
Communication line
with the throttle valve
controller
(1) Error in communication between the throttle valve controller and engine-ECU
D Disables lean-mixture combustion.
D Shuts off fuel supply when engine speed exceeds 3,000 r/min.
(1) Error in communication between the throttle valve controller and engine-ECU
D Disables lean-mixture combustion.
D Shuts off fuel supply when engine speed exceeds 3,000 r/min.
D The throttle valve controller controls the throttle valve opening angle by using
the accelerator pedal position sensor (2nd channel) signal.