M20C-FKS ENGINE CONTROL SFI SYSTEM P03351F Crankshaft Position Sensor "A" Circuit Intermittent P03352A Crankshaft Position Sensor "A" Signal Stuck in Range P033531 Crankshaft Position Sensor "A" No Signal
DESCRIPTION
Refer to DTC P033511.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P03351F | Crankshaft Position Sensor "A" Circuit Intermittent | Under conditions (a), (b) and (c), no crankshaft position sensor signal to ECM for 0.05 seconds or more (1 trip detection logic):
(a) Engine speed is 1000 rpm or higher. (b) Starter signal is off. (c) 3 seconds or more have elapsed since the starter signal switched from on to off. |
·
Open or short in crankshaft position sensor circuit ·
Crankshaft position sensor ·
Crankshaft position sensor plate ·
ECM |
- | DTC stored | SAE: P0339 |
| P03352A | Crankshaft Position Sensor "A" Signal Stuck in Range | No crankshaft position sensor signal to the ECM while cranking (1 trip detection logic). | ·
Open or short in crankshaft position sensor circuit ·
Crankshaft position sensor ·
Crankshaft position sensor plate ·
ECM |
Comes on | DTC stored | SAE: P0335 |
| P033531 | Crankshaft Position Sensor "A" No Signal | The engine stalls and the engine speed signal value decreases rapidly (1 trip detection logic). | ·
Open or short in crankshaft position sensor circuit ·
Crankshaft position sensor ·
Crankshaft position sensor plate ·
ECM |
Comes on | DTC stored | SAE: P0335 |
Reference: Inspection using an oscilloscope.
MONITOR DESCRIPTION
A DTC will be stored if any of the following occurs:
The crankshaft position sensor signal (NE signal) is not received by the ECM when the engine is being cranked.
The crankshaft position sensor signal (NE signal) is not received by the ECM when the engine is running.
The engine stalls and the engine speed signal value decreases rapidly (under normal conditions the engine speed will decrease gradually).
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].
Run the engine at an engine speed of 1000 rpm for 5 seconds or more [B].
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Trouble Codes [C].
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: P03351F, P03352A or P033531.
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 [C] again.
·[A] to [C]: 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
Refer to DTC P033511.
CAUTION / NOTICE / HINT
- HINT:
- ·
If no problem is found by this diagnostic troubleshooting procedure, check for problems by referring to the engine mechanical section.
·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
| *a | Clearance |
Visually check the crankshaft position sensor for damage.
Check the crankshaft position sensor installation condition.
- OK:
The crankshaft position sensor does not have any damage and is installed properly.
- Result:
Proceed to OK NG
OK
NG
Inspect the teeth of the crankshaft position sensor plate.
- OK:
Crankshaft position sensor plate does not have any cracks or deformation.
- 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