MONITOR DESCRIPTION
A monitor will run when the engine is started at an engine coolant temperature of -10 (14°F) or higher, and less than 50°C (122°F). If certain conditions are met, a DTC is stored after the engine idles for 15 seconds (2 trip detection logic).
This DTC is designed to monitor the ignition timing at cold start. When the engine is started at an engine coolant temperature of less than 50°C (122°F), the ECM checks the ignition timing during engine idling. If the ignition timing advances beyond the specified level within 10 seconds, the ECM interprets this as a malfunction, illuminates the MIL and stores this DTC.
NOTICE:
The idle speed control learned values are cleared by performing learning value reset. Idle speed control learning needs to be performed before this DTC can be stored.
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
MIL | Note |
---|---|---|---|---|---|
P050B00 | Cold Start Ignition Timing Performance |
Ignition timing insufficiently retarded at cold start (2 trip detection logic). |
| Comes on |
|
MONITOR STRATEGY
Related DTCs | P050B: Cold start ignition timing performance |
Required Sensors/Components (Main) | Throttle body with motor assembly |
Required Sensors/Components (Related) |
Engine coolant temperature sensor Mass air flow meter sub-assembly |
Frequency of Operation | Once per driving cycle |
Duration | 10 seconds |
MIL Operation | 2 driving cycles |
Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
Monitor runs whenever the following DTCs are not stored |
P0010, P1360, P1362, P1364, P1366, P2614 (Motor drive VVT system control module) P0011 (VVT system - advance) P0012 (VVT system - retard) P0013 (Exhaust VVT oil control solenoid) P0014 (Exhaust VVT system - advance) P0015 (Exhaust VVT system - retard) P0016 (VVT system - misalignment) P0017 (Exhaust VVT system - misalignment) P0087, P0088, P0191, P0192, P0193 (Fuel pressure sensor (for high pressure side)) P0101, P0102, P0103 (Mass air flow meter) P0107, P0108 (Manifold absolute pressure) P0116, P0117, P0118 (Engine coolant temperature sensor) P0121, P0122, P0123, P0222, P0223, P2135 (Throttle position sensor) P0125 (Insufficient coolant temperature for closed loop fuel control) P014C, P014D, P015A, P015B, P2195, P2196, P2237, P2238, P2239, P2252, P2253 (Air fuel ratio sensor (sensor 1)) P0171, P0172 (Fuel system) P0201, P0202, P0203, P0204, P062D, P21CF, P21D0, P21D1, P21D2 (Fuel injector) P0300, P0301, P0302, P0303, P0304 (Misfire) P0335, P0337, P0338 (Crankshaft position sensor) P0340, P0342, P0343 (Camshaft position sensor) P0365, P0367, P0368 (Exhaust camshaft position sensor) P0401 (EGR system (closed)) P0657, P0658, P2102, P2103, P2111, P2112, P2119 (Throttle actuator) P107B, P107C, P107D (Fuel pressure sensor (for low pressure side)) P11EA, P11EC, P11ED, P11EE, P11EF, P219A, P219C, P219D, P219E, P219F (Air-fuel ratio imbalance) P1235 (High pressure fuel pump circuit) P2228, P2229 (Atmospheric pressure sensor) |
Auxiliary battery voltage | 8 V or higher |
Time after engine start | 5 seconds or more |
Starter | Off |
Engine coolant temperature at engine start |
-10°C (14°F) or higher |
Engine coolant temperature | -10°C (14°F) or higher, and less than 50°C (122°F) |
Fuel-cut | Off |
Vehicle speed | Less than 32767 km/h (20360 mph) |
Atmospheric pressure | 76 kPa(abs) [11 psi(abs)] or higher |
TYPICAL MALFUNCTION THRESHOLDS
Accumulated time when ignition timing retard is cut off |
8 seconds or more |
CONFIRMATION DRIVING PATTERN
HINT:
Click here
Click here
Click here
Click here
HINT:
GTS Display |
Description |
---|---|
NORMAL |
|
ABNORMAL |
|
INCOMPLETE |
|
HINT:
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
WIRING DIAGRAM
Refer to DTC P010012.
Click here
CAUTION / NOTICE / HINT
NOTICE:
Click here
(Select Powertrain in Health Check and then check the time stamp data.)
Click here
Click here
HINT:
Symptoms |
Factor |
Trouble Area |
---|---|---|
Low idle speed when engine is cold (immediately after engine start) |
Excessive engine friction |
Engine oil deterioration |
Rough idle when engine is cold (immediately after engine start) |
Abnormal combustion |
Fuel quality |
PROCEDURE
1. | CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P050B00) |
(a) Read the DTCs.
Powertrain > Engine > Trouble Codes
Result | Proceed to |
---|---|
DTC P050B00 is output |
A |
DTC P050B00 and other DTCs are output |
B |
HINT:
If any DTCs other than P050B00 are output, troubleshoot those DTCs first.
B | GO TO DTC CHART |
|
2. |
READ VALUE USING GTS (FUEL TRIM) |
HINT:
Calculate the total fuel trim values to check the characteristic deviation of the mass air flow meter sub-assembly.
(a) Put the engine in Inspection Mode (Maintenance Mode).
Powertrain > Hybrid Control > Utility
Tester Display |
---|
Inspection Mode |
(b) Start the engine.
(c) Enter the following menus.
Powertrain > Engine > Data List
Tester Display |
---|
Short FT B1S1 |
Long FT B1S1 |
(d) Read the values displayed on the GTS at engine idle.
(e) Add the Short FT B1S1 and Long FT B1S1 values to obtain the total fuel trim.
Standard:
GTS Display | Specified Condition |
---|---|
Total of Short FT B1S1 and Long FT B1S1 |
Between -20 and 20% |
NG | GO TO STEP 7 |
|
3. |
INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (VISUALLY CHECK THROTTLE VALVE) |
(a) Check for foreign matter between the throttle valve and housing. If necessary, clean the throttle body with motor assembly. Also, check that the throttle valve moves smoothly.
OK:
Throttle valve is not contaminated with foreign matter and moves smoothly.
NG | GO TO STEP 6 |
|
4. |
PERFORM ACTIVE TEST USING GTS (CONTROL THE EGR STEP POSITION) |
(a) Put the engine in Inspection Mode (Maintenance Mode).
Powertrain > Hybrid Control > Utility
Tester Display |
---|
Inspection Mode |
(b) Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher.
HINT:
The A/C switch and all accessories should be off.
(c) Enter the following menus.
Powertrain > Engine > Active Test
Active Test Display |
---|
Control the EGR Step Position |
Data List Display |
---|
Intake Manifold Absolute Pressure |
Coolant Temperature |
Engine Independent |
(d) Confirm that the value of Data List item Engine Independent is "Operate" then check the value of Intake Manifold Absolute Pressure while performing the Active Test.
NOTICE:
OK:
The value of Intake Manifold Absolute Pressure changes in response to the EGR step position when the value of Engine Independent is "Operate".
Standard:
- | Control the EGR Step Position (Active Test) | |
---|---|---|
0 Steps | 0 to 30 Steps | |
Intake Manifold Absolute Pressure (Data List) |
(EGR valve is fully closed) |
Intake Manifold Absolute Pressure value is at least +10 kPa (1.45 psi) higher than when EGR valve is fully closed |
HINT:
OK | GO TO STEP 14 |
|
5. |
INSPECT EGR VALVE ASSEMBLY |
(a) Remove the EGR valve assembly.
Click here
(b) Check if the EGR valve is stuck open.
OK:
EGR valve is tightly closed.
OK | GO TO STEP 14 |
NG | GO TO STEP 17 |
6. |
REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY |
(a) Replace the throttle body with motor assembly.
Click here
HINT:
Perform "Inspection After Repair" after replacing the throttle body with motor assembly.
Click here
NEXT | GO TO STEP 21 |
7. |
CHECK PCV VALVE AND HOSE CONNECTIONS |
(a) Check the PCV hose connections.
(b) Check the PCV valve.
Click here
OK:
PCV hose and PCV valve are connected correctly and are not damaged.
NG | GO TO STEP 20 |
|
8. |
CHECK INTAKE SYSTEM |
(a) Check the intake system for vacuum leaks.
Click here
OK:
No leaks from intake system.
NG | GO TO STEP 19 |
|
9. |
CHECK AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY |
(a) Visually check that the air cleaner filter element sub-assembly is not excessively contaminated with dirt or oil.
OK:
The air cleaner filter element sub-assembly is not excessively contaminated with dirt or oil.
NG | GO TO STEP 18 |
|
10. |
PERFORM ACTIVE TEST USING GTS (CONTROL THE EGR STEP POSITION) |
(a) Put the engine in Inspection Mode (Maintenance Mode).
Powertrain > Hybrid Control > Utility
Tester Display |
---|
Inspection Mode |
(b) Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher.
HINT:
The A/C switch and all accessories should be off.
(c) Enter the following menus.
Powertrain > Engine > Active Test
Active Test Display |
---|
Control the EGR Step Position |
Data List Display |
---|
Intake Manifold Absolute Pressure |
Coolant Temperature |
Engine Independent |
(d) Confirm that the value of Data List item Engine Independent is "Operate" then check the value of Intake Manifold Absolute Pressure while performing the Active Test.
NOTICE:
OK:
The value of Intake Manifold Absolute Pressure changes in response to the EGR step position when the value of Engine Independent is "Operate".
Standard:
- | Control the EGR Step Position (Active Test) | |
---|---|---|
0 Steps | 0 to 30 Steps | |
Intake Manifold Absolute Pressure (Data List) |
(EGR valve is fully closed) |
Intake Manifold Absolute Pressure value is at least +10 kPa (1.45 psi) higher than when EGR valve is fully closed |
HINT:
OK | GO TO STEP 12 |
|
11. |
INSPECT EGR VALVE ASSEMBLY |
(a) Remove the EGR valve assembly.
Click here
(b) Check if the EGR valve is stuck open.
OK:
EGR valve is tightly closed.
NG | GO TO STEP 17 |
|
12. |
PERFORM ACTIVE TEST USING GTS (CHECK VVT SYSTEM) |
(a) Operate the VVT system through the Active Test, and check if the VVT system is operating normally.
(1) Perform the Active Test, referring to DTC P001100 Procedure (VVT-iE system for intake camshaft).
Click here
(2) Perform the Active Test, referring to DTC P001400 Procedure (VVT-i system for exhaust camshaft).
Click here
NG | GO TO STEP 16 |
|
13. |
READ VALUE USING GTS (MASS AIR FLOW SENSOR) |
(a) Put the engine in Inspection Mode (Maintenance Mode).
Powertrain > Hybrid Control > Utility
Tester Display |
---|
Inspection Mode |
(b) Start the engine.
(c) Enter the following menus.
Powertrain > Engine > Data List
Tester Display |
---|
Engine Speed |
Mass Air Flow Sensor |
Coolant Temperature |
(d) Allow the engine to idle until Coolant Temperature is 75°C (167°F) or higher.
(e) Read Mass Air Flow Sensor while maintaining an engine speed of 2500 rpm.
HINT:
During charge control, the engine speed is set at idle. Therefore, the engine speed will not increase when the accelerator pedal is depressed. In this case, read the Data List after charge control has completed.
Standard:
GTS Display | Condition |
Specified Condition |
---|---|---|
Mass Air Flow Sensor |
| Between 5.5 and 18.6 gm/sec |
NG | GO TO STEP 23 |
|
14. |
CLEAR DTC |
(a) Clear the DTCs.
Powertrain > Engine > Clear DTCs(b) Turn the ignition switch off and wait for at least 30 seconds.
|
15. |
CHECK WHETHER DTC OUTPUT RECURS (DTC P050B00) |
NOTICE:
In this operation, the engine must be cold (approximately the same as the engine coolant temperature recorded in the Freeze Frame Data).
(a) Enter the following menus.
Powertrain > Engine > Data List
Tester Display |
---|
Coolant Temperature |
(b) Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
(c) Put the engine in Inspection Mode (Maintenance Mode).
Powertrain > Hybrid Control > Utility
Tester Display |
---|
Inspection Mode |
(d) Start the engine and warm it up until the engine coolant temperature is the same as the engine coolant temperature in the Freeze Frame Data.
(e) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(f) Enter the following menus.
Powertrain > Engine > Utility
Tester Display |
---|
All Readiness |
(g) Input the DTC: P050B00.
(h) Check the DTC judgment result.
Result | Proceed to |
---|---|
NORMAL (DTCs are not output) |
A |
ABNORMAL (DTC P050B00 is output) |
B |
A | CHECK FOR INTERMITTENT PROBLEMS |
B | GO TO STEP 23 |
16. |
CHECK AND REPAIR VVT SYSTEM |
(a) Check and repair the VVT system.
HINT:
Click here
Click here
NEXT | GO TO STEP 21 |
17. |
REPLACE EGR VALVE ASSEMBLY |
(a) Replace the EGR valve assembly.
Click here
HINT:
Perform "Inspection After Repair" after replacing the EGR valve assembly.
Click here
NEXT | GO TO STEP 21 |
18. |
REPLACE AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY |
(a) Replace the air cleaner filter element sub-assembly.
NEXT | GO TO STEP 21 |
19. |
REPAIR OR REPLACE INTAKE SYSTEM |
(a) Repair or replace the intake system.
HINT:
Perform "Inspection After Repair" after repairing or replacing the intake system.
Click here
NEXT | GO TO STEP 21 |
20. |
REPAIR OR REPLACE PCV VALVE OR HOSE |
(a) Repair or replace the PCV valve or hose.
|
21. |
CLEAR DTC |
(a) Clear the DTCs.
Powertrain > Engine > Clear DTCs(b) Turn the ignition switch off and wait for at least 30 seconds.
|
22. |
CHECK WHETHER DTC OUTPUT RECURS (DTC P050B00) |
NOTICE:
In this operation, the engine must be cold (approximately the same as the engine coolant temperature recorded in the Freeze Frame Data).
(a) Enter the following menus.
Powertrain > Engine > Data List
Tester Display |
---|
Coolant Temperature |
(b) Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
(c) Put the engine in Inspection Mode (Maintenance Mode).
Powertrain > Hybrid Control > Utility
Tester Display |
---|
Inspection Mode |
(d) Start the engine and warm it up until the engine coolant temperature is the same as the engine coolant temperature in the Freeze Frame Data.
(e) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(f) Enter the following menus.
Powertrain > Engine > Utility
Tester Display |
---|
All Readiness |
(g) Input the DTC: P050B00.
(h) Check the DTC judgment result.
Result | Proceed to |
---|---|
NORMAL (DTCs are not output) |
A |
ABNORMAL (DTC P050B00 is output) |
B |
A | END |
|
23. |
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY CONNECTOR CONNECTION) |
(a) Check the connection and terminal contact pressure of connectors and wire harnesses between the mass air flow meter sub-assembly and ECM.
Click here
HINT:
Repair any problems.
|
24. |
CLEAR DTC |
(a) Clear the DTCs.
Powertrain > Engine > Clear DTCs(b) Turn the ignition switch off and wait for at least 30 seconds.
|
25. |
CHECK WHETHER DTC OUTPUT RECURS (DTC P050B00) |
NOTICE:
In this operation, the engine must be cold (approximately the same as the engine coolant temperature recorded in the Freeze Frame Data).
(a) Enter the following menus.
Powertrain > Engine > Data List
Tester Display |
---|
Coolant Temperature |
(b) Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
(c) Put the engine in Inspection Mode (Maintenance Mode).
Powertrain > Hybrid Control > Utility
Tester Display |
---|
Inspection Mode |
(d) Start the engine and warm it up until the engine coolant temperature is the same as the engine coolant temperature in the Freeze Frame Data.
(e) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(f) Enter the following menus.
Powertrain > Engine > Utility
Tester Display |
---|
All Readiness |
(g) Input the DTC: P050B00.
(h) Check the DTC judgment result.
Result | Proceed to |
---|---|
NORMAL (DTCs are not output) |
A |
ABNORMAL (DTC P050B00 is output) |
B |
A | END |
|
26. |
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM) |
(a) Disconnect the mass air flow meter sub-assembly connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition |
Specified Condition |
---|---|---|
C26-4 (VCC) - C139-78 (VCVG) |
Always | Below 1 Ω |
C26-3 (FG) - C139-101 (VG) |
Always | Below 1 Ω |
C26-2 (E2G) - C139-79 (E2G) |
Always | Below 1 Ω |
C26-4 (VCC) or C139-78 (VCVG) - Body ground and other terminals |
Always | 10 kΩ or higher |
C26-3 (FG) or C139-101 (VG) - Body ground and other terminals |
Always | 10 kΩ or higher |
C26-2 (E2G) or C139-79 (E2G) - Body ground and other terminals |
Always | 10 kΩ or higher |
NG | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
27. |
REPLACE MASS AIR FLOW METER SUB-ASSEMBLY |
(a) Replace the mass air flow meter sub-assembly.
Click here
HINT:
Click here
|
28. |
CLEAR DTC |
(a) Clear the DTCs.
Powertrain > Engine > Clear DTCs(b) Turn the ignition switch off and wait for at least 30 seconds.
|
29. |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED |
NOTICE:
In this operation, the engine must be cold (approximately the same as the engine coolant temperature recorded in the Freeze Frame Data).
(a) Enter the following menus.
Powertrain > Engine > Data List
Tester Display |
---|
Coolant Temperature |
(b) Check that the engine coolant temperature is between -10 and 50°C (14 and 122°F).
(c) Put the engine in Inspection Mode (Maintenance Mode).
Powertrain > Hybrid Control > Utility
Tester Display |
---|
Inspection Mode |
(d) Start the engine and warm it up until the engine coolant temperature is the same as the engine coolant temperature in the Freeze Frame Data.
(e) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(f) Enter the following menus.
Powertrain > Engine > Utility
Tester Display |
---|
All Readiness |
(g) Input the DTC: P050B00.
(h) Check the DTC judgment result.
Result | Proceed to |
---|---|
NORMAL (DTCs are not output) |
A |
ABNORMAL (DTC P050B00 is output) |
B |
A | END |
B | REPLACE ECM |