Engine Electrical System

Diagnostic trouble code: P0500 “Malfunction of improper speed signal”
Item
No.
Operation procedure
Inspection
results
Follow-up
procedure
1
Connect the diagnostic tester and adaptor,
and turn the ignition switch to “OFF”
position.
Proceed to next
step.
Yes
Check and service
the ABS system.
2
For the vehicles equipped with ABS
system, verify that there is a diagnostic
trouble code designed for ABS system.
No
Proceed to next
step.
Yes
Proceed to next
step.
3
Verify that the indicating needle of
speedometer works properly.
No
Check and service
the instrument
circuit.
Yes
Proceed to next
step.
4
Verify that the speed sensor works
properly.
No
Replace the speed
sensor.
Yes
Repair or replace
the wiring harness.
5
Verify that the circuit between the signal
cable of speed sensor and 59# pin of ECU
is open, or is short to power supply or to
ground.
No
Refer to diagnosis
help.
E-48
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