Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 376

Code No.14 Throttle position sensor system (2nd channel)
The throttle valve controller determines whether a failure is present or not, and
sends a signal indicating its result to the engine-ECU.
Range of check
Ignition switch: ON
Throttle position sensor (1st channel) is normal
Set conditions
The throttle position sensor (1st channel) output voltage is 1.24 V or more, and
the (2nd channel) output voltage is 4.6 V or more for one second.
or
The throttle position sensor (1st channel) output voltage is 3.53 V or less, and
the (2nd channel) output voltage is 0.2 V or less for one second.
or
Throttle position sensor (1st and 2nd channels) output voltages are outside 4
to 6 V.
Check the throttle position sensor. (Re-
fer to P.13A-106.)
OK
Measure at the throttle position sensor
connector A-66.
Disconnect the connector, and
measure at the harness side.
Voltage 1 and earth
(Ignition switch: ON)
OK: 4.8 – 5.2 V
Continuity between 3 and earth
OK: Continuity
OK
Measure at engine-ECU connector
B-31.
Connect the connector.
Disconnect the throttle control servo
connector (Close the throttle valve
fully by finger).
Voltage between terminal 84 and
earth
(Ignition switch: ON)
OK: 4.2 – 4.8 V
OK
Measure at throttle valve controller con-
nector B-15.
Connect the connector.
Disconnect the throttle control servo
connector (Close the throttle valve
fully by finger).
Voltage between 7 and earth
(Ignition switch: ON)
OK: 0.4 – 0.6 V
OK
Replace the throttle valve controller.
GDI –
Troubleshooting
NG
Replace
NG
Check the following connector: B-15
Check trouble symptom.
NG
Check the following connector: A-66
Check trouble symptom.
Check the harness wire between the
engine-ECU and throttle position sen-
sor.
Repair
NG
Check the following connector: A-66
Check trouble symptom.
Check the harness wire between the
throttle valve controller and throttle
position sensor, and repair if necessary.
Probable cause
Malfunction of throttle position sensor (2nd channel)
Open circuit or short-circuited harness wire in throttle
position sensor (2nd channel) or poor connector
contact
Faulty throttle valve controller
Malfunction of the engine-ECU
NG
OK
NG
NG
OK
NG
OK
NG
NG
OK
NG
13A-17
Repair
Check the harness wire between the
throttle position sensor and throttle
valve controller.
OK
NG
Repair
Replace the throttle valve controller.
Repair
Adjust the throttle position sensor. (Re-
fer to P.13A-96.)
Check trouble symptom.
NG
Replace the engine-ECU.
Repair