M20D-FKS ENGINE CONTROL SFI SYSTEM P033511 Crankshaft Position Sensor "A" Circuit Short to Ground P033515 Crankshaft Position Sensor "A" Circuit Short to Battery or Open
DESCRIPTION
The crankshaft position sensor system consists of a crankshaft position sensor plate and Magneto-Resistive Element (MRE) type sensor. The crankshaft position sensor plate has 34 teeth at 10° intervals (2 teeth are missing for detecting top dead center), and is installed on the crankshaft. The crankshaft position sensor generates 34 signals per crankshaft revolution. The ECM uses the crankshaft position sensor signal (NE signal) to detect the crankshaft position and engine speed.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P033511 | Crankshaft Position Sensor "A" Circuit Short to Ground | The crankshaft position sensor output voltage is less than 0.3 V for 4 seconds or more (1 trip detection logic). | ·
Open or short in crankshaft position sensor circuit ·
Crankshaft position sensor ·
ECM |
Comes on | DTC stored | SAE: P0337 |
| P033515 | Crankshaft Position Sensor "A" Circuit Short to Battery or Open | The crankshaft position sensor output voltage is higher than 4.7 V for 4 seconds or more (1 trip detection logic). | ·
Open or short in crankshaft position sensor circuit ·
Crankshaft position sensor ·
ECM |
Comes on | DTC stored | SAE: P0338 |
Reference: Inspection using an oscilloscope.
- HINT:
-
The correct waveform is as shown.
| ECM Terminal Name | Between NE+ and NE- |
| Tester Range | 2 V/DIV., 20 ms./DIV. |
| Condition | Idling with warm engine |
MONITOR DESCRIPTION
If the output voltage transmitted by the crankshaft position sensor 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) | Crankshaft position sensor |
| Required Sensors/Components (Related) | Camshaft 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 20 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: P033511 or P033515.
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 has a malfunction.
·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:
- ·
The engine speed can be checked by using the GTS. To perform the check, follow the procedures below:
(a)Connect the GTS to the DLC3.
(b)Turn the ignition switch to ON.
(c)Turn the GTS on.
(d)Enter the following menus: Powertrain / Engine / Data List / Engine Speed.
(e)Start the engine.
The engine speed may be indicated as zero despite the engine running normally. This is caused by a lack of NE signals from the crankshaft position sensor. Alternatively, the engine speed may be indicated as lower than the actual engine speed if the crankshaft position sensor output voltage is insufficient.
·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 / Data List / Engine Speed.
- Powertrain > Engine > Data List
-
Tester Display Engine Speed - 50003 372 211
Start the engine.
Read the values displayed on the GTS while the engine is running.
- Standard:
Correct values are displayed.
- HINT:
- ·
To check the engine speed change, display the graph on the GTS.
·If the engine does not start, check the engine speed while cranking.
·If the engine speed indicated on the GTS remains at zero (0), there may be an open or short in the crankshaft position sensor circuit.
- Result:
Proceed to OK NG
OK
NG
| *a | Front view of wire harness connector
(to Crankshaft Position Sensor) |
- HINT:
-
Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.
Disconnect the crankshaft position sensor 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 F4-3 (VCNE) - Body ground Ignition switch ON 4.5 to 5.5 V F4-1 (NE+) - 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 F4-3 (VCNE) - F4-1 (NE+) Ignition switch off 1.425 to 1.575 kΩ F4-2 (NE-) - Body ground Ignition switch off Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Disconnect the crankshaft position sensor connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition F4-3 (VCNE) - C71-129 (VCNE) Always Below 1 Ω F4-2 (NE-) - C71-99 (NE-) Always Below 1 Ω F4-1 (NE+) - C71-133 (NE+) Always Below 1 Ω F4-3 (VCNE) or C71-129 (VCNE) - Body ground and other terminals Always 10 kΩ or higher F4-2 (NE-) or C71-99 (NE-) - Body ground and other terminals Always 10 kΩ or higher F4-1 (NE+) or C71-133 (NE+) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG