Power Supply And Ground Circuit
POWER SUPPLY AND GROUND CIRCUIT
Diagnosis Procedure
1. CHECK GROUND CONNECTION-I
1.Turn ignition switch OFF.
2.Check ground connection M95. Refer to Ground Inspection in Circuit Inspection.
Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace ground connection.
2. CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-I
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 4.
NO- GO TO 3.
3. DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F103, M116
- Harness for open or short between ECM and ground
- Repair open circuit or short to power in harness or connectors.
4. CHECK ECM POWER SUPPLY CIRCUIT-I
1.Reconnect ECM harness connector.
2.Turn ignition switch ON.
3.Check the voltage between ECM harness connector and ground.
Is the inspection result normal?
YES- GO TO 6.
NO- GO TO 5.
5. DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E3, F1
- IPDM E/R harness connector E7
- 10 A 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.
6. CHECK ECM POWER SUPPLY CIRCUIT-II
1.Turn ignition switch OFF and wait at least 10 seconds.
2.Check the voltage between ECM harness connector terminals as follows.
Is the inspection result normal?
YES- GO TO 7.
NO- GO TO 9.
7. CHECK ECM POWER SUPPLY CIRCUIT-III
1.Turn ignition switch ON.
2.Check the voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES- GO TO 8.
NO- Replace IPDM E/R.
8. CHECK INTERMITTENT INCIDENT
Circuit Inspection.
- INSPECTION END
9. 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 terminals as follows.
Is the inspection result normal?
YES- GO TO 13.
NO- GO TO 10.
10. CHECK ECM POWER SUPPLY CIRCUIT-IV
1.Disconnect ECM harness connector.
2.Disconnect IPDM E/R harness connector.
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- GO TO 11.
11. DETECT MALFUNCTIONING PART
Check the following.
- Harness or connectors E3, F1
- Harness or connectors F104, F105
- Harness for open or short between ECM and IPDM E/R
- Repair open circuit or short to ground or short to power in harness or connectors.
12. CHECK 15 A FUSE
1.Disconnect 15 A fuse (No. 50) from IPDM E/R.
2.Check 15 A fuse.
Is the inspection result normal?
YES- GO TO 15.
NO- Replace 15 A fuse.
13. CHECK ECM POWER SUPPLY CIRCUIT-IV
1.Disconnect ECM harness connector.
2.Disconnect IPDM E/R harness connector.
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 15.
NO- GO TO 14.
14. DETECT MALFUNCTIONING PART
Check the following.
- Harness or connectors E106, M6
- Harness for open or short between ECM and IPDM E/R
- Repair open circuit or short to ground or short to power in harness or connectors.
15. CHECK INTERMITTENT INCIDENT
Intermittent Incident.
Is the inspection result normal?
YES- Replace IPDM E/R.
NO- Repair open circuit or short to ground or short to power in harness or connectors.