Power Supply And Ground Circuit

POWER SUPPLY AND GROUND CIRCUIT


Diagnosis Procedure

1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E38. 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
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 4.
NO - GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F1, E8
- 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 connectors.
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.
- 15 A fuse (No. 62)
- 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. Turn ignition switch ON and then OFF.
3. Check the voltage between ECM harness connector and ground.





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. With I-Key (WITH I-key) or Without I-Key (WITHOUT I-KEY) .
8.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
- INSPECTION END
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 13.
NO - GO TO 10.
10.CHECK ECM POWER SUPPLY CIRCUIT-V
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E14.
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 connectors E8, F1
- 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 FUSE
1. Disconnect 20 A fuse (No. 43) from IPDM E/R.
2. Check 20 A fuse.
Is the inspection result normal?
YES - GO TO 15.
NO - Replace 20 A fuse.
13.CHECK ECM POWER SUPPLY CIRCUIT-VI
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E14.
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 connectors E8, F1
- 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. With I-Key (WITH I-key) or Without I-Key (WITHOUT I-KEY) .
NO - Repair open circuit or short to ground or short to power in harness or connectors.