STOP AND START STOP AND START SYSTEM P279796 Electromagnetic Oil Pump Component Internal Failure
DESCRIPTION
- HINT:
-
This DTC is applicable to Automatic Transmission models only.
Refer to DTC P279612.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Memory | Note |
|---|---|---|---|---|---|---|
| P279796 | Electromagnetic Oil Pump Component Internal Failure | One of the following conditions are met for 0.21 seconds or more (2 trip detection logic):
·
Electromagnetic oil pump operating (Tr1: On, Tr2: On). ·
Either of the following conditions is met: -
EGND terminal voltage 10 V or higher. -
EGND terminal voltage below 1 V. |
·
Wire harness or connector ·
Transmission wire ·
Electromagnetic oil pump ·
Engine stop and start solenoid filter ·
Engine stop and start ECU |
Blinks | DTC stored | SAE Code: P2797 |
CONFIRMATION DRIVING PATTERN
CONFIRMATION AFTER TROUBLESHOOTING
- HINT:
- ·
If the cable is disconnected from the battery terminal, stop and start control is prohibited until refresh charge is completed.
In this case, let the vehicle idle to complete the refresh charge. The refresh charge is complete when the Data List item "Status of Battery Charge Control" changes from "Refresh Charge Mode". (Usually, idling the engine for 5 to 60 minutes with the battery fluid temperature at 11°C (51°F) or higher, the refresh charge will be completed.)
·If the GTS is not available and the Data List item "Status of Battery Charge Control" cannot be checked, charge the battery by idling the engine for approximately 5 to 60 minutes or driving the vehicle, and then drive the vehicle and check that stop and start control operates.
If the engine is started with the hood open, the system determines that a jump start has occurred. Therefore, make sure that the hood is closed before starting the engine and driving the vehicle.
·After the refresh charge completes, turn the ignition switch off, wait for at least 30 seconds, and then start the engine again. If the vehicle enters refresh charge mode again while the engine is idling, the initial refresh charge did not properly complete, so wait for the refresh charge to complete.
·Allow the engine to idle for 3 minutes after it is warmed up and check that the engine idle speed is within 50 rpm of the target idle speed.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs.
- Powertrain > Stop and Start > Clear DTCs
- 50002 392
Start the engine and warm it up.
Drive the vehicle at 7 km/h (4 mph) or more.
- CAUTION:
-
When performing Confirmation Driving Pattern, obey all speed limits and traffic laws.
Depress the brake pedal and stop the vehicle.
Keep the engine stopped by stop and start control. (Keep the shift lever in D.)
Release the brake pedal with the shift lever in D to start the engine.
Check that no DTCs are output.
- Powertrain > Stop and Start > Trouble Codes
- 50001 392
STOP AND START SYSTEM OPERATION CHECK
- HINT:
- ·
If the cable is disconnected from the battery terminal, stop and start control is prohibited until refresh charge is completed.
In this case, let the vehicle idle to complete the refresh charge. The refresh charge is complete when the Data List item "Status of Battery Charge Control" changes from "Refresh Charge Mode". (Usually, idling the engine for 5 to 60 minutes with the battery fluid temperature at 11°C (51°F) or higher, the refresh charge will be completed.)
·If the GTS is not available and the Data List item "Status of Battery Charge Control" cannot be checked, charge the battery by idling the engine for approximately 5 to 60 minutes or driving the vehicle, and then drive the vehicle and check that stop and start control operates.
If the engine is started with the hood open, the system determines that a jump start has occurred. Therefore, make sure that the hood is closed before starting the engine and driving the vehicle.
·After the refresh charge completes, turn the ignition switch off, wait for at least 30 seconds, and then start the engine again. If the vehicle enters refresh charge mode again while the engine is idling, the initial refresh charge did not properly complete, so wait for the refresh charge to complete.
Start the engine and warm it up.
Turn the air conditioning system off.
Drive the vehicle at 7 km/h (4 mph) or more.
- CAUTION:
-
When performing Confirmation Driving Pattern, obey all speed limits and traffic laws.
Depress the brake pedal and stop the vehicle.
Allow the engine to stop by stop and start control. (Keep the shift lever in D.)
Release the brake pedal with the shift lever in D to start the engine.
WIRING DIAGRAM
Refer to DTC P279612.
CAUTION / NOTICE / HINT
- NOTICE:
- ·
Before replacing the engine stop and start ECU, read the number of starter operations and write it into a new engine stop and start ECU.
·After replacing the engine stop and start ECU or air conditioning amplifier assembly, reset and perform learning of the air conditioning information in the engine stop and start ECU.
·After replacing the engine stop and start ECU or airbag sensor assembly, clear and calibrate the deceleration sensor zero point in the engine stop and start ECU.
·When the engine stop and start ECU or electromagnetic oil pump is replaced, check the electromagnetic oil pump.
- HINT:
- ·
DTCs for the stop and start system are not cleared even if the malfunction has been repaired. After repairing the malfunction, be sure to clear the DTCs.
·Using the GTS, read the freeze frame data before troubleshooting. System condition information is recorded as freeze frame data the moment a DTC is stored. This information can be useful when troubleshooting.
PROCEDURE
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Stop and Start / Trouble Codes.
Read the DTCs
- Powertrain > Stop and Start > Trouble Codes
- 50001 392
- Result:
Result Proceed to DTC P279796 is output A DTCs P279796 and P323A19 are output B
A
B
| *a | Front view of wire harness connector
(to Engine Stop and Start ECU) |
Disconnect the engine stop and start ECU connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition N33-9 (EMOP) - N33-8 (EGND) 20°C (68°F) 5.0 to 5.6 Ω
- Result:
Proceed to OK NG
OK
NG
| *a | Component without harness connected
(Engine Stop and Start ECU) |
- | - |
Disconnect the engine stop and start ECU connector.
Disconnect the transmission wire connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition N33-9 (EMOP) - N33-8 (EGND) Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
Inspect the electromagnetic oil pump.
- Result:
Proceed to OK NG
OK
NG
| *a | Component without harness connected
(Engine Stop and Start Solenoid Filter) |
Remove the engine stop and start solenoid filter.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition 2 (MOP+) - 1 (MOP-) Always 10 kΩ or higher 7 (MOPI) - 8 (GND) Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG