Mitsubishi MOTORS Space Runner 1998, Workshop Manual

Page: 1029 / 1164

CHASSIS ELECTRICAL -
Combination Meters
54-17
TROUBLESHOOTING
54300070705
INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble symptom Inspection
procedure
Reference
page
Speedometer does not work. 1 54-17
Tachometer does not work. 2 54-18
Fuel gauge does not operate. 4 54-19
Engine coolant temperature gauge does not operate. 5 54-20
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
Inspection Procedure 1
Speedometer does not work. Probable cause
The cause may be a defective vehicle speed sensor circuit system or a defective
speedometer. Vehicle speed sensor is co-used among the engine-ECU and A/T-ECU.
D Malfunction of vehicle speed sensor
D Malfunction of speedometer
D Malfunction of harness or connector
Disconnect the combination meter con-
nectors B-01 and measure at the har-
ness sides.
(1) Measure the voltage between
terminal No.38 and body earth when
the vehicle is moved forwards and
backwards.
OK
: 4.7 V or more
(2) Voltage between the terminal No.42
and body earth
OK
: System voltage
(3) Continuity between the terminal
No.31 and body earth
OK
: Continuity
(1) NG
Vehicle speed sensor circuit system
inspection (Refer to Inspection
Procedure 3 on P.54-18.)
(2) NG
Check the following connectors:
B-89, B-91, B-01
NG
Repair
OK
Check trouble symptom.
NG
Check the harness wire between the
power supply and combination meter,
and repair if necessary.
(3) NG
Check the following connector:
B-01
NG
Repair
OK
Replace the speedometer.
OK
Check trouble symptom.
NG
Check the harness wire between the
body earth and combination meter, and
repair if necessary.