1.CHECK OUTPUT SIGNAL OF ECM.
1) Turn the ignition switch to ON.
2) Measure the voltage between ECM connector and chassis ground.
Connector & terminal
(B134) No. 13 (+) — Chassis ground (−):
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Is the voltage 10 V or more?
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2.CHECK HARNESS BETWEEN ECM AND COMBINATION METER CONNECTOR.
1) Turn the ignition switch to OFF.
2) Remove the combination meter. 
3) Disconnect the connectors from ECM and combination meter.
4) Measure the resistance of harness between ECM connector and combination meter connector.
Connector & terminal
(B134) No. 13 — (i10) No. 38:
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Is the resistance less than 1 Ω?
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Repair the harness and connector.
NOTE:
In this case, repair the following item:
• Open circuit of harness between ECM connector and combination meter connector
• Poor contact of coupling connector
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3.CHECK POOR CONTACT.
Check for poor contact of combination meter connector.
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Is there poor contact of combination meter connector?
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Repair the poor contact of combination meter connector.
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4.CHECK HARNESS BETWEEN COMBINATION METER AND IGNITION SWITCH CONNECTOR.
1) Turn the ignition switch to ON.
2) Measure the voltage between combination meter connector and chassis ground.
Connector & terminal
(i10) No. 2 (+) — Chassis ground (−):
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Is the voltage 10 V or more?
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Replace the meter case assembly of combination meter.
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Check the following item and repair if necessary.
NOTE:
• Blown out of fuse (No. 5)
• Open circuit or short circuit to ground in harness between fuse (No. 5) and combination meter connector
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5.CHECK POOR CONTACT.
Check for poor connection by shaking or pulling ECM connector and harness.
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Does the malfunction indicator light illuminate?
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Repair the poor contact of ECM connector.
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6.CHECK ECM CONNECTOR.
Check the connection of ECM connector.
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Is the ECM connector correctly connected?
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Replace the ECM.
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Repair the connection of ECM connector.
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