P0560
DTC P0560 SYSTEM VOLTAGEComponent Location:
GENERAL DESCRIPTION
The ECM provides ground to one side of the coil of the main relay and the other side is connected to the battery. The ECM monitors battery voltage and the voltage after the main relay.
DTC DESCRIPTION
The ECM measures the voltage from ignition key and from main relay respectively and compares two voltages. This comparison will watch if the Main Relay has switched and remains on after ignition Key-On and if it has switched off after the ignition Key-Off. The ECM sets DTC P0560 if the voltage after Main Relay is lower than a predetermined threshold after ignition key-on or higher than a predetermined threshold after ignition key-off.
DTC Detecting Condition:
Schematic Diagram:
Signal Waveform And Data:
MONITOR DTC STATUS
1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode.
2. Press F4 (DTAL) to select DTC information from the DTCs menu.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions.
4. Read "DTC Status" parameter.
5. Is parameter displayed "History (Not Present) fault"?
NOTE:
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.
YES - Fault is intermittent caused by poor contact In the sensor's and/or ECM's connector or was repaired and ECM memory was not cleared. Thoroughly check connectors for loose or poor connections, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "'Verification of Vehicle Repair" procedure
NO - Go to next step as below
COMPONENT INSPECTION
1. With Ignition OFF, remove the main relay.
2. Measure resistance between terminals 85 and 86 of the main relay (Component side)
Specification : Approx. 70 - 120 Ohms at 20 °C(68 °F)
3. Apply 12 V and a ground to 85 and 86 terminals of the main relay (Components side).
4. Check if the main relay works well when it is energized. (If the main relay works normally, a clicking sound can be heard.)
5. Does the main relay operate normally?
YES - Go to next step as below
NO - Check main relay for contamination, deterioration, or damage. Substitute with a known-good main relay and check for proper operation. If the problem is corrected, replace main relay and then go to "Verification of Vehicle Repair" procedure
POWER CIRCUIT INSPECTION
1. Ignition "ON" & Engine "OFF".
2. Measure the voltage between terminal 30 of the main relay harness connector and chassis ground.
3. Measure the voltage between terminal 85 of the main relay harness connector and chassis ground.
Specification : Approx. B+
4. Is voltage within the specification?
YES - Go to next step as below
NO - Repair as necessary and go to "Verification of Vehicle Repair" procedure.
5. Measure the voltage between terminal 87 of the main relay harness connector and chassis ground.
Specification : Approx. 0.5 V
6. Is value within the specification?
YES - Go to next step as below
NO - Repair as necessary and go to "Verification of Vehicle Repair" procedure.
CONTROL CIRCUIT INSPECTION
1. Ignition "OFF".
2. With ECM connector still disconnected, measure voltage between terminal 64 of the ECM harness connector and chassis ground.
Specification : Approx. B+
3. Is voltage within the specification?
YES - Go to next step as below
NO - Check control circuit for open or short circuit between main relay and ECM. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
IGNITION SWITCH CIRCUIT INSPECTION
1. Ignition "ON" & Engine "OFF".
2. Measure the voltage between terminal 2 of the ECM harness connector and chassis ground.
Specification : Approx. B+
3. Is voltage within the specification?
YES - Go to next step as below
NO - Repair as necessary and go to "Verification of Vehicle Repair" procedure.
TERMINAL AND CONNECTOR INSPECTION
1. Many malfunctions in the electrical system are caused by poor harness(es) 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 - Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary 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. Press F4 (DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions.
3. Read "DTC Status" parameter.
4. Is parameter displayed "History (Not Present) fault"?
YES - System performing to specification at this time. Clear the DTC
NO - Go to the applicable troubleshooting procedure