M20C-FKS ENGINE CONTROL SFI SYSTEM P034011 Camshaft Position Sensor "A" Bank 1 or Single Sensor Circuit Short to Ground P034015 Camshaft Position Sensor "A" Bank 1 or Single Sensor Circuit Short to Battery or Open
DESCRIPTION
The camshaft position sensor (for intake camshaft) (VV1 signal) consists of a magnet and MRE (Magneto-Resistive Element).
The intake camshaft has a timing rotor for the camshaft position sensor. When the intake camshaft rotates, changes occur in the air gaps between the timing rotor and MRE, which affects the magnetic field. As a result, the resistance of the MRE material fluctuates. The camshaft position sensor converts the camshaft rotation data to pulse signals, uses the pulse signals. The ECM uses the pulse signals to determine the camshaft angle. Then the ECM uses this data to control fuel injection duration and injection timing.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P034011 | Camshaft Position Sensor "A" Bank 1 or Single Sensor Circuit Short to Ground | The camshaft position sensor (for intake camshaft) output voltage is less than 0.3 V for 4 seconds or more (1 trip detection logic). | ·
Open or short in camshaft position sensor (for intake camshaft) circuit ·
Camshaft position sensor (for intake camshaft) ·
ECM |
Comes on | DTC stored | SAE: P0342 |
| P034015 | Camshaft Position Sensor "A" Bank 1 or Single Sensor Circuit Short to Battery or Open | The camshaft position sensor (for intake camshaft) output voltage is higher than 4.7 V for 4 seconds or more (1 trip detection logic). | ·
Open or short in camshaft position sensor (for intake camshaft) circuit ·
Camshaft position sensor (for intake camshaft) ·
ECM |
Comes on | DTC stored | SAE: P0343 |
Reference: Inspection using an oscilloscope.
- HINT:
- ·
The correct waveform is as shown.
·VV1 stands for the camshaft position sensor signal (for intake camshaft), and EV1 stands for the camshaft position sensor signal (for exhaust camshaft).
| ECM Terminal Name | CH1: Between VV1+ and VV1-
CH2: Between EV1+ and EV1- |
| Tester Range | 5 V/DIV., 20 ms./DIV. |
| Condition | Idling with warm engine |
MONITOR DESCRIPTION
If the output voltage transmitted by the camshaft position sensor (for intake camshaft) remains low or high, the ECM interprets this as a malfunction in the sensor circuit, illuminates the MIL and stores a DTC.
MONITOR STRATEGY
| Required Sensors/Components (Main) | Camshaft position sensor (for intake camshaft) |
| Required Sensors/Components (Related) | Crankshaft position sensor |
| Frequency of Operation | Continuous |
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).
Turn the ignition switch off and wait for at least 30 seconds.
Start the engine.
Idle the engine for 10 seconds or more [A].
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Trouble Codes [B].
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: P034011 or P034015.
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 is NORMAL, the system is normal.
·If the judgment result is ABNORMAL, the system is malfunctioning.
·If the judgment result is INCOMPLETE, perform steps [A] through [B] again.
·[A] to [B]: 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.
WIRING DIAGRAM
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
| *a | Front view of wire harness connector
(to Camshaft Position Sensor (for Intake Camshaft)) |
- HINT:
-
Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.
Disconnect the camshaft position sensor (for intake camshaft) connector.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition C10-3 (VC) - Body ground Ignition switch ON 4.5 to 5.5 V C10-1 (VVI+) - Body ground Ignition switch ON 3.0 to 5.0 V
Turn the ignition switch off and wait for at least 30 seconds.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Switch Condition Specified Condition C10-3 (VC) - C10-1 (VVI+) Ignition switch off 1.425 to 1.575 kΩ C10-2 (VVI-) - Body ground Ignition switch off Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Disconnect the camshaft position sensor (for intake camshaft) connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C10-1 (VVI+) - C71-162 (VV1+) Always Below 1 Ω C10-2 (VVI-) - C71-161 (VV1-) Always Below 1 Ω C10-3 (VC) - C71-160 (VCV1) Always Below 1 Ω C10-1 (VVI+) or C71-162 (VV1+) - Body ground and other terminals Always 10 kΩ or higher C10-2 (VVI-) or C71-161 (VV1-) - Body ground and other terminals Always 10 kΩ or higher C10-3 (VC) or C71-160 (VCV1) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG