Mitsubishi Pajero Pinin 1999 Workshop Manual page 304

23-12
AUTOMATIC TRANSMISSION ±
Code No. 38 Vehicle speed sensor system
If no output pulse is detected from the vehicle speed sensor for 120 seconds or
more continuously while driving at a speed of 60 km/h or more, there is judged
to be an open circuit in the vehicle speed sensor and diagnosis code No. 38 is
output.
Vehicle speed sensor check (Refer to
GROUP 54 ± Combination meter.)
OK
Measure at the vehicle speed sensor
connector B-08.
Disconnect the connector and
measure at the harness side.
(1) Voltage between 1 and earth
(Ignition switch: ON)
OK: System voltage
(2) Voltage between 3 and earth
(Ignition switch: ON)
OK: 4.8 ± 5.2 V
(3) Continuity between 2 and earth
OK: Continuity
OK
Check the following connectors:
B-08, D-02, D-04
OK
NG
Repair
Check the trouble symptoms.
NG
Check the harness wire between
A/T-ECU and vehicle speed sensor.
OK NG
Repair
Replace the A/T - ECU.
NG
Replace
(1) NG
Check the following connectors:
<L.H. drive vehicles> D-02, C-38, C-02,
C-76, C-74
(2) NG
<R.H. drive vehicles> D-02, C-41, C-76,
C-74
(3) NG
Check the trouble symptoms.
Check the harness wire between igni-
tion switch and vehicle speed sensor.
Check the ignition switch. (Refer to
GROUP 54.)
Check the following connectors:
D-02, D-04
Check the trouble symptoms.
Check the harness wire between
A/T-ECU and vehicle speed sensor.
Replace the A/T - ECU.
Check the harness wire between
vehicle speed sensor and earth, and
repair if necessary.
Troubleshooting <A/T>
Probable cause
Malfunction of the vehicle speed sensor
Malfunction of harness or connector
Malfunction of the A/T - ECU
Malfunction of the ignition switch
NG
OK
NG
NG
OK
NG
OK
NG
NG
OK
Repair
Repair
Repair
Repair