NR Series ENGINE CONTROL SFI SYSTEM P011C62 Charge Air Cooler Temperature/Intake Air Temperature Bank 1 Signal Compare Failure
DESCRIPTION
The engine has two temperature sensors, an intake air temperature sensor (built into No. 2 turbo pressure sensor) and an intake air temperature sensor (built into mass air flow meter sub-assembly), to detect temperature while the engine is operating. A thermistor, whose resistance value varies according to the temperature, is built into each sensor. When the temperature becomes low, the resistance of the thermistor increases. When the temperature becomes high, the resistance drops. These variations in resistance are transmitted to the ECM as voltage changes.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P011C62 | Charge Air Cooler Temperature/Intake Air Temperature Bank 1 Signal Compare Failure | All of the following conditions are met (2 trip detection logic):
1.
The battery voltage is 8.0 V or higher. 2.
7 hours or more have elapsed since the engine stopped on the previous trip. 3.
118 seconds or more after a cold engine start. 4.
Either of the following conditions is met: (a)
The minimum intake air temperature (for mass air flow meter sub-assembly) after the engine starts is -10°C (14°F) or higher. (b)
The intake air temperature (for No. 2 turbo pressure sensor) before the engine starts is -10°C (14°F) or higher. 5.
The difference between the readings of the intake air temperature (for No. 2 turbo pressure sensor) and (for mass air flow meter sub-assembly) is higher than 20°C (36°F). |
·
Mass air flow meter sub-assembly ·
No. 2 turbo pressure sensor ·
ECM |
Comes on | DTC stored | SAE Code: P011C |
- HINT:
- ·
Waiting is required to prevent the temperature of the engine from affecting the readings. If the engine has been operated recently, it is not possible to accurately compare the readings.
·For diagnosis, in order to duplicate the detection conditions of the DTC, it is necessary to park the vehicle for 7 hours. Parking the vehicle for 7 hours ensures that the actual temperature of the intake air temperature (for No. 2 turbo pressure sensor) and intake air temperature (for mass air flow meter sub-assembly) are very similar. When the vehicle has been parked for less than 7 hours, differences in the readings may exist, but this does not necessarily indicate a fault.
MONITOR DESCRIPTION
The ECM monitors the difference between the intake air temperature (for No. 2 turbo pressure sensor) and the intake air temperature (for mass air flow meter sub-assembly) when the engine is started cold to accurately detect the engine temperature conditions. The monitor runs when the engine is started after 7 hours or more have elapsed since the engine was stopped (ignition switch turned off) on the previous trip. If the difference between the intake air temperature (for No. 2 turbo pressure sensor) and the intake air temperature (for mass air flow meter sub-assembly) on a cold start exceeds 20°C (68°F), the ECM interprets this as a malfunction in the No. 2 turbo pressure sensor circuit and intake air temperature sensor circuit, and stores the DTC.
MONITOR STRATEGY
| Frequency of Operation | Once per driving cycle |
CONFIRMATION DRIVING PATTERN
- HINT:
- ·
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
·When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure) [A].
Turn the ignition switch off.
With the engine stopped, leave the vehicle as is for 7.5 hours or more [B].
Start the engine and wait 118 seconds or more [C].
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Trouble Codes [D].
Read the pending DTCs.
- HINT:
- ·
If a pending DTC is output, the system is malfunctioning.
·If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P011C62.
Check the DTC judgment result.
| GTS Display | Description |
|---|---|
| NORMAL | ·
DTC judgment completed ·
System normal |
| ABNORMAL | ·
DTC judgment completed ·
System abnormal |
| INCOMPLETE | ·
DTC judgment not completed ·
Perform driving pattern after confirming DTC enabling conditions |
- HINT:
- ·
If the judgment result shows NORMAL, the system is normal.
·If the judgment result shows ABNORMAL, the system has a malfunction.
·[B] to [D]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
·When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
CAUTION / NOTICE / HINT
- HINT:
-
Read Freeze Frame Data using the GTS. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
PROCEDURE
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Trouble Codes.
Read the DTCs.
- Powertrain > Engine > Trouble Codes
- 50001 372
- Result:
Result Proceed to DTC P011C62 is output A DTC P011C62 and other DTCs are output B
- HINT:
-
If any DTCs other than P011C62 are output, troubleshoot those DTCs first.
A
B
Leave the vehicle for 7 hours or more.
- HINT:
-
It is necessary to leave the vehicle for 7 hours or more to create conditions similar to the DTC detection conditions.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Data List / Intake Air Temperature.
- Powertrain > Engine > Data List
-
Tester Display Intake Air Temperature - 50003 372 214
Read the value displayed on the GTS.
- Standard:
Difference between the intake air temperature and the actual outside air temperature is within 10°C (18°F).
- HINT:
- ·
Temperature readings on the outside temperature gauge of the vehicle (if equipped) are not suitable for comparing to the intake air temperature reading. The outside temperature gauge has a significant delay built in to prevent swings in the temperature display. Use an accurate thermometer to determine the outside air temperature.
·Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.
- Result:
Proceed to OK NG
OK
NG
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Data List / Intake air Temperature B1S1 (Turbo).
- Powertrain > Engine > Data List
-
Tester Display Intake Air Temperature B1S1 (Turbo) - 50003 372 310
Read the value displayed on the GTS.
- Standard:
The difference between the intake air temperature (for No. 2 turbo pressure sensor) and the actual outside air temperature is within 10°C (18°F).
- HINT:
-
If the result is not as specified, check that there are no heat sources such as a block heater in the engine compartment.
- Result:
Proceed to OK NG
OK
NG