Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 391

13A-32
Code No.77 Accelerator pedal position sensor (2nd
channel) system
Range of check
Accelerator pedal position sensor (1st channel) system is normal.
Communication between the engine-ECU and throttle valve controller is normal.
Set conditions
Output voltage of accelerator position sensor (2nd channel) system is 0.2 V
or less for one second.
or
Output voltage of the accelerator pedal position sensor (1st channel) is 2.5 V
or less, and output voltage of the accelerator pedal position sensor (2nd channel)
is 4.5 V or more for one second.
or
Difference between the accelerator pedal position sensor output voltages (1st
and 2nd channels) exceeds 1.0 V (i.e. when the throttle valve opening angle
changes slightly).
Check the accelerator pedal position
sensor (2nd channel). (Refer to P.13A-
107.)
OK
Measure at accelerator pedal position
sensor (2nd channel) connector A-84.
Disconnect the connector, and
measure at the harness side.
Voltage between terminal 8 and
earth
(Ignition switch: ON)
OK: 4.8 – 5.2 V
Continuity between terminal 7 and
earth
OK: Continuity
OK
Measure at throttle valve controller con-
nector B-15.
Connect the connector.
Voltage between terminal 20 and
earth
(Ignition switch: ON)
OK: 0.7 – 1.4 V
(Accelerator pedal: fully re-
leased)
4 V or more
(Accelerator pedal: fully de-
pressed)
OK
MUT-II Data list
78 Accelerator pedal position sensor
(1st channel). (Refer to P.13A-78.)
OK
Replace the throttle valve controller.
GDI –
Troubleshooting
NG
Replace the accelerator pedal position
sensor assembly.
NG
Check the following connector:
B-15
Check trouble symptom.
NG
Check the following connector:
A-84
Check trouble symptom.
NG
Check the accelerator pedal position
sensor (1st channel) system. (Refer to
P.13A-33, INSPECTION
DURE FOR DIAGNOSIS CODE 78.)
Probable cause
Malfunction of the accelerator pedal position sensor
(2nd channel)
Open circuit or short-circuited harness wire in the
accelerator pedal position sensor (2nd channel)
system, or poor connector contact
Malfunction of the throttle valve controller
Malfunction of the engine-ECU
NG
OK
NG
NG
OK
NG
PROCE-
Repair
Check the harness wire between the
throttle valve controller and the accelerator
pedal position sensor (2nd channel).
OK
NG
Repair
Replace the throttle valve controller.
Repair
Check the harness wire between the
accelerator pedal position sensor (2nd
channel) and throttle valve controller.
OK
NG
Repair
Adjust the accelerator pedal position
sensor (2nd channel). (Refer to P.13A-
97.)
Check trouble symptom.
NG
Replace the throttle valve controller.