For Mexico

POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure


1. INSPECTION START

Start engine.
Is engine running?
YES- GO TO 8.
NO- GO TO 2.

2. CHECK ECM POWER SUPPLY CIRCUIT-I

1.Turn ignition switch OFF and then ON.
2.Check the voltage between ECM harness connector and ground.





Is the inspection result normal?
YES- GO TO 4.
NO- GO TO 3.

3. DETECT MALFUNCTIONING PART

Check the following.
- IPDM E/R harness connector E10
- 10A fuse (No. 44)
- Harness for open or short between ECM and fuse
- Repair open circuit or short to ground or short to power in harness or connectors.

4. CHECK GROUND CONNECTION-I

1.Turn ignition switch OFF.
2.Check ground connection E38. Refer to Ground Inspection in Circuit Inspection.
Is the inspection result normal?
YES- GO TO 5.
NO- Repair or replace ground connection.

5. CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-I

1.Disconnect ECM harness connectors.
2.Check the continuity between ECM harness connector and ground.





3.Also check harness for short to power.
Is the inspection result normal?
YES- GO TO 7.
NO- GO TO 6.

6. DETECT MALFUNCTIONING PART

Check the following.
- Harness connectors F121, E7
- Harness for open or short between ECM and ground

- Repair open circuit or short to power in harness or connectors.

7. CHECK ECM POWER SUPPLY CIRCUIT-II

1.Reconnect ECM harness connectors.
2.Turn ignition switch ON.
3.Check the voltage between IPDM E/R harness connector and ground.





Is the inspection result normal?
YES- Go to Ignition Signal.
NO- GO TO 8.

8. CHECK ECM POWER SUPPLY CIRCUIT-III

1.Turn ignition switch OFF and wait at least 10 seconds.
2.Check the voltage between ECM harness connector and ground.





Is the inspection result normal?
YES- GO TO 14.
NO-1- Battery voltage does not exist: GO TO 9.
NO-2- Battery voltage exists for more than a few seconds: GO TO 11.

9. CHECK ECM POWER SUPPLY CIRCUIT-IV

1.Turn ignition switch OFF and wait at least 10 seconds.
2.Check the voltage between ECM harness connector and ground.





Is the inspection result normal?
YES- GO TO 10.
NO- GO TO 11.

10. CHECK ECM POWER SUPPLY CIRCUIT-V

1.Disconnect ECM harness connector.
2.Disconnect IPDM E/R harness connector E10.
3.Check the continuity between ECM harness connector and IPDM E/R harness connector.





4.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- GO TO 16.
NO- Repair open circuit or short to ground or short to power in harness or connectors.

11. CHECK ECM POWER SUPPLY CIRCUIT-VI

1.Disconnect ECM harness connector.
2.Disconnect IPDM E/R harness connector F12.
3.Check the continuity between ECM harness connector and IPDM E/R harness connector.





4.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- GO TO 12.
NO- Repair open circuit or short to ground or short power in harness or connectors.

12. CHECK 15A FUSE

1.Disconnect 15A fuse (No. 50) from IPDM E/R. For the fuse number, Engine Control System For Mexico.
For the fuse arrangement, Fuse, Connector And Terminal Arrangement Sedan.
2.Check 15A fuse.
Is the inspection result normal?
YES- GO TO 16.
NO- Replace 15A fuse.

13. CHECK GROUND CONNECTION-II

1.Turn ignition switch OFF.
2.Check ground connection E38. Refer to Ground Inspection in Circuit Inspection.
Is the inspection result normal?
YES- GO TO 14.
NO- Repair or replace ground connection.

14. CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-II

1.Disconnect ECM harness connector.
2.Check the continuity between ECM harness connector and ground.





3.Also check harness for short to power.
Is the inspection result normal?
YES- GO TO 16.
NO- GO TO 15.

15. DETECT MALFUNCTIONING PART

Check the following.
- Harness or connectors F121, E7
- Harness for open or short between ECM and ground
- Repair open circuit or short to power in harness or connectors.

16. CHECK INTERMITTENT INCIDENT

Intermittent Incident.
Is the inspection result normal?

YES- Replace IPDM E/R. Service and Repair.
NO- Repair open circuit or short to power in harness or connectors.