1) Turn the ignition switch to ON.
2) Measure the voltage between ECM and chassis ground.
Connector & terminal
(B136) No. 3 (+) — Chassis ground (−):
(B136) No. 4 (+) — Chassis ground (−):
Is the voltage 10 V or more?
Check ignition control system.
Repair the harness and connector.
NOTE:
In this case, repair the following item:
• Open circuit in harness between ECM and main relay connector
• Poor contact of main relay connector