POWER SUPPLY AND GROUND CIRCUIT
Diagnosis Procedure
1.CHECK GROUND CONNECTION
- Turn ignition switch OFF.
- Check ground connection E9. Refer to Ground Inspection in See: Testing and Inspection\Initial Inspection and Diagnostic Overview\Service Information For Electrical Incident\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
- Disconnect ECM harness connector.
- Check the continuity between ECM harness connector and ground.
- 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 E11, F2
- 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
- Reconnect ECM harness connector.
- Turn ignition switch OFF and then ON.
- Check the voltage between ECM harness connectors.
Is the Inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
- IPDM E/R connector E18
- 10 A fuse (No. 35)
- Harness for open or short between ECM and IPDM E/R >> Repair open circuit, short to ground or short to power in harness or connectors.
6.CHECK ECM POWER SUPPLY CIRCUIT-II
- Turn ignition switch OFF and wait at least 10 seconds.
- Check the voltage between ECM harness connectors.
Is the Inspection result normal?
YES >> GO TO 7.
NO >> GO TO 9.
7.CHECK ECM POWER SUPPLY CIRCUIT-III
- Turn ignition switch ON.
- 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
Refer to See: Testing and Inspection\Initial Inspection and Diagnostic Overview\Service Information For Electrical Incident\Intermittent Incident.
>> Inspection END
9.CHECK ECM POWER SUPPLY CIRCUIT-IV
- Turn ignition switch OFF and wait at least 10 seconds.
- Check the voltage between ECM harness connectors.
Is the Inspection result normal?
YES >> GO TO 12.
NO >> GO TO 10.
10.CHECK ECM POWER SUPPLY CIRCUIT-V
- Disconnect ECM harness connector.
- Disconnect IPDM E/R harness connector.
- Check the continuity between ECM harness connector and IPDM E/R harness connector.
- Also check harness for short to ground and short to power. Is the Inspection result normal?
YES >> GO TO 11.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
11.CHECK 15 A FUSE
- Disconnect 15 A fuse (No. 42) from IPDM E/R.
- Check 15 A fuse. Is the Inspection result normal?
YES >> GO TO 13.
NO >> Replace 15 A fuse.
12.CHECK ECM POWER SUPPLY CIRCUIT-VI
- Disconnect ECM harness connector.
- Disconnect IPDM E/R harness connector.
- Check the continuity between ECM harness connector and IPDM E/R harness connector.
- Also check harness for short to ground and short to power. Is the Inspection result normal?
YES >> GO TO 13.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
13.CHECK INTERMITTENT INCIDENT
Refer to See: Testing and Inspection\Initial Inspection and Diagnostic Overview\Service Information For Electrical Incident\Intermittent Incident.
Is the Inspection result normal?
YES >> Replace IPDM E/R.
NO >> Repair or replace harness or connectors.
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