Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 84

Code No. 24 Vehicle speed sensor system
Range of check
D Ignition switch: ON
D Excluding 60 seconds after the ignition switch is turned to ON or immediately
after the engine starts.
D Idle position switch: OFF
D Engine speed is 3,000 r/min or more.
D Driving under high engine load conditions.
Set conditions
D Sensor output voltage does not change for 4 seconds (no pulse signal input).
Does the speedometer operate normally?
Measure at the engine-ECU connector B-51 <M/T> or the
engine-A/T-ECU connector B-111 <A/T>.
D Connect the connector.
D Voltage between terminal 86 <M/T>, 80 <A/T> and earth
(Ignition switch: ON)
OK: If the vehicle is moved forward without starting the engine,
0 V and system voltage alternates.
Check the following connector: A-81 <A/T>
OK
Check trouble symptom.
Check the harness wire between the vehicle speed sensor and
engine-ECU <M/T> or engine-A/T-ECU <A/T>.
MPI -
Yes
NG
NG
Repair
NG
Troubleshooting
Probable cause
D Malfunction of the vehicle speed sensor
D Improper
short-circuited harness wire of the vehicle speed
sensor circuit
D Malfunction
engine-A/T-ECU <A/T>
No
Check the vehicle speed sensor circuit. (Refer to GROUP 54 -
Combination Meter.)
OK
Check the following connector: B-51 <M/T>, B-111 <A/T>
OK
Check trouble symptom.
Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.
13D-19
connector contact, open circuit
of the engine-ECU <M/T>
NG
Repair
NG
or
or