Mitsubishi Electric Lancer Evolution-VII Workshop Manual page 1180

Code No. P0500 Vehicle speed sensor system
Inspection Range
D Ignition switch: ON
D After 2 seconds from setting ignition switch to ON position or completion of engine
starting
D The engine speed is approximately 2,000 - 4,000 r/min or more.
D The volumetric efficiency is 60 - 80%.
Evaluation Conditions
D Vehicle speed signal does not change for 2 seconds. (Pulse signal is not input.)
Is speedometer normal?
YES
Measure at the C-115 engine-ECU
connector.
D Connect the connector.
D Voltage between terminal No. 86
and earth
(Ignition switch: ON)
OK: When vehicle is pushed and
moved, repeatedly varies
between 0 and 5 V.
NG
Check the following connectors:
B-03, C-115
OK
Check the trouble symptoms.
NG
Replace the engine-ECU.
MPI -
Troubleshooting
NO
Check the vehicle speed sensor.
(Refer to GROUP 54 - Combination
Meter.)
OK
Check the following connector:
C-115
Check the trouble symptoms.
Replace the engine-ECU.
NG
Repair
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
Probable cause
D Vehicle speed sensor malfunction
D Vehicle speed sensor circuit disconnection,
short-circuit, or connector contact defect
D Engine-ECU malfunction
NG
OK
NG
13A-43
Repair