P0562
P0562Component Location:
General Description
The PCM provides ground to one side of the coil of the main relay and the other side is connected to the battery. The PCM monitors battery voltage and the voltage after the main relay.
DTC Description
During engine running, if system voltage is below 11 V, PCM sets P0562. MIL (Malfunction Indication Lamp) turns on when the malfunction lasts till consecutive 2 driving cycle.
DTC Detecting Condition:
Specification
Coil Resistance: 70 ohms - 120 ohms
Schematic Diagram:
Monitor DTC Status
1. Check DTC Status
1. Connect scantool to Data Link Connector (DLC).
2. IG "ON".
3. Select "Diagnostic Trouble Codes (DTCs)" mode, and then Press F5 (INFO) to check DTC's information from the DTCs menu
4. Read "DTC Status" parameter.
5. Is parameter displayed "Present fault"?
YES - Go to "Terminal and Connector inspection" procedure.
NO - Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, ending, corrosion, contamination, deterioration, or damage. Repair or replace 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 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 " Power Circuit Inspection " procedure.
Power Supply Circuit Inspection
1. Check voltage
1. IG "OFF".
2. Disconnect the main relay.
3. IG "ON" and ENG "OFF"
4. Measure the voltage between terminal 2 of main relay harness connector and chassis ground.
5. Measure the voltage between terminal 5 of main relay harness connector and chassis ground.
Specification : B+
6. Is the measured voltage within specification?
YES - Go to "Check open in harness" procedure.
NO
- Check the fuse between battery and main relay.
- Repair Open or Short to ground in power circuit and go to "Verification of Vehicle Repair" procedure
2. Check open in harness
1. IG "OFF".
2. Disconnect main relay and PCM connector.
3. Measure the resistance between terminal 3 of main relay harness connector and terminals 38, 39, 40 of PCM harness connector.
Specification : Approx. below 1 ohm
4. Is the measured resistance within specification?
YES - Go to "Check short in harness" procedure.
NO - Repair open in harness and go to "Verification of Vehicle Repair" procedure.
3. Check short in harness
1. IG "OFF".
2. Disconnect main relay and PCM connector.
3. Measure the resistance between terminal 3 of main relay harness connector and chassis ground.
Specification : Infinite
4. Is the measured resistance within specification?
YES - Go to "Control circuit inspection" procedure.
NO - Repair short in harness and go to "Verification of Vehicle Repair" procedure.
Control Circuit Inspection
1. Check short in harness
1. IG "OFF".
2. Disconnect main relay and PCM connector.
3. Measure the resistance between terminal 4 of main relay harness connector and chassis ground.
Specification : Infinite
4. Is the measured resistance within specification?
YES - Go to "Check open in harness" procedure.
NO - Repair short in control harness and go to "Verification of Vehicle Repair" procedure.
2. Check open in harness
1. IG "OFF".
2. Disconnect main relay and PCM connector.
3. Measure the resistance between terminal 4 of main relay harness connector and terminal 43 of PCM harness connector.
Specification : Approx. below 1 ohm
4. Is the measured resistance within specification?
YES - Go to "System inspection" procedure.
NO - Repair open in control harness and go to "Verification of Vehicle Repair" procedure.
System Inspection
1. Check Alternator circuit
1. IG "OFF".
2. Disconnect alternator connector.
3. IG "ON" and ENG "OFF"
4. Measure the voltage between terminal 2 of alternator and chassis ground.
5. Measure the voltage between terminal 3 of alternator and chassis ground.
Specification : B+
6. Is the measured resistance within specification?
YES - Go to "Component inspection" procedure.
NO
- In case terminal 2 : Repair MIL circuit, MIL resistor or Open in circuit and go to "Verification of Vehicle Repair" procedure.
- In case terminal 3 : Repair the fuse(30A IG2) between battery and Ignition switch, the fuse(10A IG3) between Ignition switch and alternator or Open in circuit and go to "Verification of Vehicle Repair" procedure.
Component Inspection
1. Check Main relay
1. IG "OFF".
2. Disconnect the main relay.
3. Measure the resistance between terminal 2 and 4 of main relay.
4. Measure the resistance between terminal 5 and 3 of main relay.
Specification : 70 - 120 0hms
5. Is the measured resistance within specification?
YES - Substitute with a known - good PCM and check for proper operation. If the problem is corrected, replace PCM and go to "Verification of Vehicle Repair" 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.
NOTE: There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by PCM. After testing PCM on the vehicle, use this function to reuse the PCM on the others
Verification of Vehicle Repair
1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode
2. Press F5 (INFO) 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.