CHASSIS ELECTRICAL – Combination Meters
54-25
Inspection Procedure 2
Tachometer does not work.
Probable cause
The ignition signal may not be input from the engine, or there may be a malfunction
in the power supply or earth circuit.
D Malfunction of tachometer
D Malfunction of harness or connector
Disconnect the combination meter con-
nector B-08 and measure at the harness
sides.
1. Measure the voltage between
terminal No.33 and earth.
OK: 5 V
2. Continuity between the terminal
No.34 and earth
OK: Continuity
3. Voltage between the terminal No.42
and earth
OK: System voltage
1. NG
Check the following connectors.
B-08, A-36, B-61, B-64, A-41, A-109
NG
Repair
OK
Check trouble symptom.
NG
Check the harness between the engine-
ECU and combination meter, and repair
if necessary.
2. NG
Check the following connectors.
B-08, B-50, B-64, A-41
NG
Repair
OK
Check trouble symptom.
NG
Check the harness between the com-
bination meter and the body earth, and
repair if necessary.
OK
Replace the tachometer.
3. NG
Check the following connectors.
B-08, B-75, B-76
NG
Repair
OK
Check trouble symptom.
NG
Check the harness between the power
supply and combination meter, and
repair if necessary.
YES
Refer to Group 13 – Troubleshooting,
No. 44 Ignition coils and power
transistors.
OK
MUT-II Self-Diag code
Is the diagnosis code 44 relating to MPI
system output?
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