Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 493

13B-12
Code No.14 Throttle position sensor system
Range of Check
Ignition switch: ON
Excluding 60 seconds after the ignition switch is turned to ON or immediately
after the engine starts.
Set conditions
Engine speed is 3,000 r/min or less, and volumetric efficiency is 30% or less,
TPS output voltage is 4.6 V or more for 4 seconds.
or
Engine speed is 2,000 r/min or more, and volumetric efficiency is 60% or more,
TPS output voltage is 0.8 V or less for 4 seconds.
Check the throttle position sensor.
(Refer to P.13B-72.)
OK
Measure at the throttle position sensor
connector A-66.
Disconnect the connector, and
measure at the harness side.
Voltage between 1 and earth
(Ignition switch: ON)
OK: 4.8 – 5.2 V
Continuity between 4 and earth
OK: Continuity
OK
Measure at the engine-ECU connector
B-31.
Connect the connector.
Voltage between 84 and earth
(Ignition switch: ON)
OK: 0.5 – 0.8 V
(Throttle valve: Idle position)
OK: 4.8 – 5.1 V
(Throttle valve: Fully open)
OK
Check the following connector:
B-31
OK
Check trouble symptom.
NG
Replace the engine-ECU.
MPI –
Troubleshooting
NG
Replace
NG
Check the following connector:
B-31
Check trouble symptom.
Check the harness wire between the
engine-ECU and the throttle position
sensor connector.
Replace the engine-ECU.
NG
Check the following connector:
A-66
Repair
NG
Repair
Probable cause
Malfunction of the throttle position sensor
Improper connector
short-circuited harness wire of the throttle position
sensor circuit
Malfunction of the engine-ECU
NG
OK
NG
NG
OK
OK
NG
contact, open circuit
Repair
Repair
Check trouble symptom.
NG
Check the harness wire between the
engine-ECU and the throttle position
sensor connector.
OK
NG
Repair
Replace the throttle position sensor.
or