P0560

DTC P0560 SYSTEM VOLTAGE

Component Location:

GENERAL DESCRIPTION
The main relay voltage is monitored for high or low voltage values that may indicate main relay, main relay circuit, or engine electrical system malfunctions.

DTC DESCRIPTION
If ECM/PCM detects malfunction in power supply system, ECM/PCM sets DTC P0560.

DTC Detecting Condition:

Schematic Diagram (A/T):

Schematic Diagram (M/T):

MONITOR SCANTOOL DATA
1. Connect scantool to Data Link Connector (DLC).
2. Warm up the engine to normal operating temperature.




3. Monitor the "Main relay" parameters on the scantool.
4. Are the parameters displayed correctly?

YES - Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or was repaired and ECM/PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of vehicle Repair" procedure.

NO - Go to "Terminal and connector inspection" procedure.

TERMINAL AND CONNECTOR INSPECTION
1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

YES - Repair as necessary and go to "Verification of vehicle Repair" procedure.

NO - Go to "Main relay circuit inspection" procedure.

CONTROL CIRCUIT INSPECTION
1. Key "OFF"
2. Disconnect main relay and ECM/PCM connector.
3. Measure the resistance between terminal 85 of main relay harness connector and terminal 9/C01-2 of ECM/PCM harness connector. (AT)
4. Measure the resistance between terminal 85 of main relay harness connector and terminal 22/C01 of ECM/PCM harness connector. (MT)

Specification : Approx 1 ohm

5. Is the measured resistance within specification?

YES - Go to "Power supply circuit inspection" procedure.

NO - Repair Open in control circuit and then go to "Verification of vehicle Repair" procedure.

POWER SUPPLY CIRCUIT INSPECTION
1. Key "OFF".
2. Disconnect main relay and ECM/PCM connector.
3. Measure the resistance between terminal 87 of main relay harness connector and terminal 6/C01-1 of ECM/PCM harness connector. (AT)
Measure the resistance between terminal 87 of main relay harness connector and terminal 6lC01 of ECM/PCM harness connector.(MT)

Specification : Approx 1 ohm

4. Is the measured resistance within specification?

YES - Go to "Component inspection" procedure.

NO - Repair Open in power supply circuit and then go to "Verification of vehicle Repair" procedure.

COMPONENT INSPECTION
1. Key "OFF".
2. Disconnect main relay.
3. Measure the resistance between terminal 30 and 87 of main relay. (Component side)

Specification:

4. Measure the resistance between terminal 85 and 86 of main relay. (Component side)
5. Is the measured resistance within specifications?

YES - Go to "Alternator Check" procedure.

NO
- Substitute with a known - good Main relay and check for proper operation.
- If the problem is corrected, replace Main relay and go to "Verification of Vehicle Repair" procedure.

6. Alternator check.
1. Key "OFF".
2. Check the tension of alternator belt.
3. Check corrosion, damage or looseness of Battery terminal and Alternator terminal.
4. Engine start.
5. Operate electrical parts(Head lamp, Defogger, etc).
6. Measure the voltage at 2000 rpm.

Specification : Approx 12.5 V - 14.5 V

7. Is the measured voltage within specifications?

YES
- Substitute with a known - good ECM and check for proper operation.
- If the problem is corrected, replace ECM and go to "Verification of Vehicle Repair" procedure.

NO
- Substitute with a known - good Alternator and check for proper operation.
- If the problem is corrected, replace Alternator and go to "Verification of Vehicle Repair" procedure.

VERIFICATION OF VEHICLE REPAIR
After a repair, it is essential to verify that the fault has been corrected.
1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode.
2. Clear the DTCs and Operate the vehicle within DTC Enable conditions in General information.
3. Are any DTCs present?

YES - Go to the applicable troubleshooting procedure.

NO - System is performing to specification at this time.