(c)
Press the scan tool power button.
(d)
Select the following menu items: Engine/Read DTC codes.
(e)
Read DTC codes.
Any DTC code?
No
Intermittent Fault. Refer to
Yes
Step 9
System normal, diagnostic completed.
5. Repair Instructions:
Intake VVT Actuator can only be replaced as an assembly. Do not disassemble it and repair. VVT actuator
replacement
.
2.12.7.16 DTC P0068 P0106
1. DTC Descriptor:
DTC
P0068
Electronic Throttle Air Flow Error
DTC
P0106
Intake Pressure / Throttle Position Fault
Intake Manifold Absolute Pressure (MAP) Sensor measures intake manifold pressure changes caused by the engine load, intake
manifold vacuum and engine speed changes, and convert these changes into voltage output and send to the engine Control Module
(ECM). At the same time the engine control module (ECM) compares the actual and expected intake manifold absolute pressure
changes based on the throttle position opening change, to determine whether the intake manifold absolute pressure sensor responds
to throttle position opening change and whether or not set DTC P0106.
Engine Control Module (ECM) detects air flow based on the intake manifold pressure sensor and intake air temperature sensors
measured data and compare the sir flow with expected air flow based on throttle position sensor. If the engine control module (ECM)
detects that the intake manifold absolute pressure / temperature sensor detected actual air flow and expected air flow based on
throttle position sensor is inconsistent, it will set DTC P0068.
2. Conditions For Setting DTC and The Fault Location:
DTC Code
DTC Detection Strategy
Conditions For Setting The DTC (Control
Strategy)
Fault Locations
P0068
Difference between intake
manifold absolute pressure /
temperature sensor detected
air flow and the expected air
flow based on throttle position
is 9g/s.
1. Engine Running
2. No Intake Air Pressure / Temperature
Sensor Fault
3. Duration Longer Than 4 s
1. Intake Manifold Pressure /
Temperature Sensor
2. Intake Manifold and Vacuum Tube
3. Throttle
4. ECM
2-644
Control System JL4G15-D
Engine
EC718/EC718RV EC715/EC715RV 10/2009
Summary of Contents for EC715 2009
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