1.CHECK MAIN RELAY.
1) Turn the ignition switch to OFF.
2) Remove the main relay.
3) Connect the battery to main relay terminals No. 1 and No. 2.
4) Measure the resistance between main relay terminals.
Terminals
No. 3 — No. 5:
No. 4 — No. 6:
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Is the resistance less than 10 Ω?
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Replace the main relay. 
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2.CHECK GROUND CIRCUIT FOR ECM.
1) Disconnect the connectors from the ECM.
2) Measure the resistance of harness between ECM and chassis ground.
Connector & terminal
(B134) No. 3 — Chassis ground:
(B134) No. 4 — Chassis ground:
(B134) No. 5 — Chassis ground:
(B134) No. 6 — Chassis ground:
(B134) No. 7 — Chassis ground:
(B135) No. 3 — Chassis ground:
(B135) No. 4 — Chassis ground:
(B137) No. 1 — Chassis ground:
(B137) No. 6 — Chassis ground:
(B137) No. 7 — Chassis ground:
MT model
(B135) No. 28 — Chassis ground:
RHD model
(B136) No. 33 — Chassis ground:
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Is the resistance less than 5 Ω?
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Repair the open circuit of harness between ECM connector and engine ground.
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3.CHECK INPUT VOLTAGE OF ECM.
Measure the voltage between ECM connector and chassis ground.
Connector & terminal
(B136) No. 5 (+) — Chassis ground (−):
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Is the voltage 10 V or more?
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Repair the open or ground short circuit of power supply circuit.
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4.CHECK INPUT VOLTAGE OF ECM.
1) Turn the ignition switch to ON.
2) Measure the voltage between ECM connector and chassis ground.
Connector & terminal
(B135) No. 10 (+) — Chassis ground (−):
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Is the voltage 10 V or more?
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Repair the open or ground short circuit of power supply circuit.
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5.CHECK INPUT VOLTAGE OF MAIN RELAY.
Measure the voltage between main relay connector and chassis ground.
Connector & terminal
(B47) No. 1 (+) — Chassis ground (−):
(B47) No. 5 (+) — Chassis ground (−):
(B47) No. 6 (+) — Chassis ground (−):
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Is the voltage 10 V or more?
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Repair the open or ground short circuit of power supply circuit.
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6.CHECK INPUT VOLTAGE OF ECM.
1) Turn the ignition switch to ON.
2) Measure the voltage between ECM connector and chassis ground.
Connector & terminal
(B136) No. 3 (+) — Chassis ground (−):
(B136) No. 4 (+) — Chassis ground (−):
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Is the voltage 10 V or more?
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Check ignition control system.
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Repair the open or ground short circuit of harness between ECM connector and main relay connector.
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