Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 397

13A-38
Code No.99 Malfunction in throttle valve control servo
motor system (2nd phase)
Range of check
Throttle valve control servo relay: ON
System voltage: 8V or more
Set conditions
Throttle valve control servo drive circuit is shorted to earth.
Other power source interferes with throttle valve control servo drive circuit.
Throttle valve control servo drive circuit is open-circuited.
Check the throttle valve control servo. (Refer to P.13A-109.)
Check the following connectors: A-68, B-15
Check trouble symptom.
Check the harness wire between the throttle valve control servo
and throttle valve controller.
Repair
GDI –
OK
OK
NG
NG
Troubleshooting
Probable cause
Malfunction of the throttle valve control servo
Open circuit or short-circuited harness wire in the
throttle valve control servo system, or poor connector
contact
Malfunction of the throttle valve controller
NG
Replace
NG
Repair
OK
Replace the throttle valve controller.