NR Series ENGINE CONTROL SFI SYSTEM P033531 Crankshaft Position Sensor "A" No Signal
DESCRIPTION
Refer to DTC P033511.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P033531 | Crankshaft Position Sensor "A" No Signal | Diagnosis Condition:
·
3 seconds or more have elapsed after the engine started Abnormal condition: ·
The engine stalls and the engine speed signal value decreases rapidly Malfunction Time: ·
- Trip logic: ·
1 trip detection logic Detection Conditions: ·
Continuous* Sensors/components used for detection (Main): ·
Crankshaft position sensor Sensors/components used for detection (Related): ·
Camshaft position sensor |
·
Open or short in crankshaft position sensor circuit ·
Crankshaft position sensor ·
ECM |
Comes on | DTC stored | SAE Code: P0335 |
*: When the engine is being stopped or started automatically by stop and start system control, the ECM does not monitor the crankshaft position sensor signal.
Reference: Inspection using an oscilloscope.
MONITOR DESCRIPTION
When the engine speed fluctuates abnormally during engine stall judgment, the ECM determines that the crankshaft position sensor circuit is malfunctioning and illuminates the MIL and stores a DTC. (Under normal circumstances, the engine speed gradually decreases.)
MONITOR STRATEGY
| Required Sensors/Components (Main) | Crankshaft position sensor |
| Required Sensors/Components (Related) | Camshaft position sensor |
| Frequency of Operation | Continuous |
CONFIRMATION DRIVING PATTERN
WIRING DIAGRAM
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:
1. Connect the GTS to the DLC3.
5. Start the engine.
3. Turn the GTS on.
4. Enter the following menus: Powertrain / Engine / Data List / Engine Speed.
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 / Trouble Codes.
Read the DTCs.
- Powertrain > Engine > Trouble Codes
- 50001 372
- Result:
Result Proceed to DTC P033531 is output A DTC P033531 and P033511 or P033515 are output B
- HINT:
-
If DTC P033511 or P033515 is output, perform troubleshooting for it first.
A
B
| *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 Condition Specified Condition C13-3 (VC) - Body ground Ignition switch ON 4.5 to 5.5 V C13-1 (NE+) - Body ground Ignition switch ON 3.0 to 5.0 V
Turn the ignition switch off.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C13-2 (NE-) - Body ground Ignition switch off Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Remove the crankshaft position sensor.
Confirm that there is no oil on the connecting parts of the crankshaft position sensor connector.
- OK:
There is no oil on the connecting parts of the crankshaft position sensor connector.
- Result:
Proceed to OK NG
OK
NG
| *a | Component without harness connected
(Crankshaft Position Sensor) |
Disconnect the crankshaft position sensor connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition 3 (VC) - 1 (NE+) Always 10 kΩ or higher 3 (VC) - 2 (NE-) Always 10 kΩ or higher 1 (NE+) - 2 (NE-) Always 10 kΩ or higher
- 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 C13-3 (VC) - C78-110 (VCNE) Always Below 1 Ω C13-2 (NE-) - C78-109 (NE-) Always Below 1 Ω C13-1 (NE+) - C78-76 (NE+) Always Below 1 Ω C13-3 (VC) or C78-110 (VCNE) - Body ground and other terminals Always 10 kΩ or higher C13-2 (NE-) or C78-109 (NE-) - Body ground and other terminals Always 10 kΩ or higher C13-1 (NE+) or C78-76 (NE+) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG