CHASSIS ELECTRICAL – Combination Meters
54-24
TROUBLESHOOTING
INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble symptom Inspection
procedure
Reference
page
Speedometer does not work. 1 54-24
Tachometer does not work. 2 54-25
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
Inspection Procedure 1
Speedometer does not work.
Probable cause
Examine the diagnosis codes registered in the engine-ECU. If no wheel speed
sensor-relating diagnosis code has been output, the wheel speed sensors are in order.
D Malfunction of vehicle speed sensor
D Malfunction of speedometer
D Malfunction of harness or connector
D Malfunction of relevant ECU
Disconnect the combination meter con-
nectors B-08 or B-09 and measure at
the harness sides.
1. Continuity between the terminal
No.11 and earth
OK: Continuity
2. Voltage between terminal No.51 and
earth.
OK: 4.7 V or more
3. Voltage between the terminal No.22
and earth
OK: System voltage
1. NG
OK
Replace the speedometer.
YES
Vehicle speed sensor circuit system
inspection (Refer to Inspection
Procedure 3 on P.54-26.)
OK
Check the following connectors.
B-09, B-50
NG
Repair
OK
Check trouble symptom.
Check the harness between the body
earth and combination meter, and repair
if necessary.
NG
2. NG
Check the following connectors.
B-08, B-64, A-19
NG
Repair
OK
Check trouble symptom.
Check the harness between the com-
bination meter and the vehicle speed
sensor, repair if necessary.
NG
3. NG
Check the following connectors.
B-09, B-49, B-75, B-73
NG
Repair
OK
Check trouble symptom.
Check the harness between the power
supply and combination meter, and
repair if necessary.
NG
MUT-II Self-Diag code
Is the diagnosis code 24 relating to MPI
system output?
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