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
(B135) No. 16 (+) — Chassis ground (−):
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Is the voltage less than 1 V?
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Does the malfunction indicator light illuminate when shaking or pulling the ECM connector and harness?
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Repair the poor contact 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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4.CHECK HARNESS BETWEEN COMBINATION METER AND ECM CONNECTOR.
1) Turn the ignition switch to OFF.
2) Remove the combination meter.
3) Disconnect the connector from ECM and combination meter.
4) Measure the resistance of harness between ECM and combination meter connector.
Connector & terminal
(B135) No. 16 — (i12) No. 1:
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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 and combination meter connector
• Poor contact of coupling connector
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5.CHECK POOR CONTACT.
Check poor contact of combination meter connector.
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Is there poor contact in combination meter connector?
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Repair the poor contact of combination meter connector.
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6.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. 9 (+) — Chassis ground (−):
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Is the voltage 10 V or more?
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Replace the combination meter circuit board.
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Check the following item and repair if necessary.
NOTE:
• Blown out of fuse (No. 14)
• Open or short circuit of harness between fuse (No. 14) and battery terminal
• Poor contact of ignition switch connector
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