Mitsubishi 3000GT 1991, Service Manual

Page: 669 / 1146

ELECTRONIC CONTROL SUSPENSION (ECS)
Troubleshooting
3 When diagnosis code No. 24 is output
1
<Turbo>
Using MUT, check service data on
vehicle speed sensor. Good?
Yes
Check by entering simulated vehicle speed from MUT
late high speed-sensitive control. (Refer to
No Yes No
Disconnect vehicle speed sensor
and check harness connector.
Good Replace ECS control unit.
No. 1 terminal voltage and continuity
between No. 2 terminal and ground
up to specification?
(Sensor power supply and ground)
Standards:
No. 1 terminal
Battery voltage
No. 2 terminal Continuity provided
Correct harness (between No. 1 terminal of vehicle
speed sensor and battery and between No. 2 terminal
of vehicle speed sensor and ground).
Yes
I
Is continuity provided between No. 3
terminal of vehicle speed sensor and
No. 53 terminal of ECS control unit?
Correct harness.
Yes
Check vehicle speed sensor. (Refer
to
Good?
No
Replace vehicle speed sensor.
Yes
Replace ECS control unit.
<Non-Turbo>
Using MUT, check service data on
vehicle speed sensor.
No
late high speed-sensitive control. (Refer to Good!
Replace ECS control unit.
No
Is continuity provided between No.
terminal of combination meter and
No. 53 terminal of ECS control unit?
Correct harness.
Yes
Is continuity provided between No.
64 terminal of combination meter
and ground?
No
Correct harness.
Yes
Check vehicle speed sensor. (Refer
to
Good?
Replace vehicle speed sensor.
Yes
Replace ECS control unit.
.
TSB Revision