| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001HTKF |
| Model Year Start: 2020 | Model: Corolla Hatchback | Prod Date Range: [03/2019 - 03/2023] |
| Title: M20A-FKS (ENGINE CONTROL): SFI SYSTEM: P033531; Crankshaft Position Sensor "A" No Signal; 2020 - 2023 MY Corolla Corolla Hatchback [03/2019 - 03/2023] | ||
|
DTC |
P033531 |
Crankshaft Position Sensor "A" No Signal |
DESCRIPTION
Refer to DTC P033511.
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![2020 - 2023 MY Corolla Corolla Hatchback [03/2019 - 03/2023]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: P033511; Crankshaft Position Sensor "A" Circuit Short to Ground+](/t3Portal/stylegraphics/info.gif)
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Memory |
Note |
|---|---|---|---|---|---|---|
|
P033531 |
Crankshaft Position Sensor "A" No Signal |
Diagnosis condition:
Abnormal condition:
Malfunction time:
Trip logic:
Detection conditions:
Sensors/components used for detection (Main):
Sensors/components used for detection (Related):
|
|
Comes on |
DTC stored |
|
-
Reference: Inspection using an oscilloscope.
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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
|
Related DTCs |
P0335: Crankshaft position sensor verify pulse input |
|
Required Sensors/Components (Main) |
Crankshaft position sensor |
|
Required Sensors/Components (Related) |
Camshaft position sensor |
|
Frequency of Operation |
Continuous |
|
Duration |
- |
|
MIL Operation |
Immediate |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
|
Monitor runs whenever the following DTCs are not stored |
None |
|
All of the following conditions are met |
- |
|
Battery voltage |
Higher than 6 V |
|
Crankshaft position sensor voltage |
0.3 to 4.7 V |
|
Starter |
Off |
|
Engine speed (Top dead center) |
600 rpm or higher |
|
Engine speed (30°CA) |
600 rpm or higher |
TYPICAL MALFUNCTION THRESHOLDS
|
Crankshaft position sensor signal |
No signal |
CONFIRMATION DRIVING PATTERN
Refer to DTC P03351F.
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WIRING DIAGRAM
Refer to DTC P033511.
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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 Techstream. To perform the check, follow the procedures below:
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON.
- Turn the Techstream on.
- Enter the following menus: Powertrain / Engine / Data List / Engine Speed.
- 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 Techstream. 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
|
1. |
CHECK DTC OUTPUT (DTC P033531 AND P033511 OR P033515) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Read the DTCs.
Powertrain > Engine > Trouble Codes
|
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.
| B |
|
GO TO DTC CHART
|
|
|
2. |
CHECK TERMINAL VOLTAGE AND INTERNAL RESISTANCE (CRANKSHAFT POSITION SENSOR AND ECM) |
|
*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.
(a) Disconnect the crankshaft position sensor connector.
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
Z4-3 (VCNE) - Body ground |
Ignition switch ON |
4.5 to 5.5 V |
|
Z4-1 (NE+) - Body ground |
Ignition switch ON |
3.0 to 5.0 V |
(d) Turn the ignition switch off.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
Z4-2 (NE-) - Body ground |
Ignition switch off |
Below 1 Ω |
| NG |
|
|
|
3. |
INSPECT CRANKSHAFT POSITION SENSOR |
(a) Remove the crankshaft position sensor.
Click here
(b) 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
| NG |
|
REPLACE CRANKSHAFT POSITION SENSOR
|
|
|
4. |
INSPECT CRANKSHAFT POSITION SENSOR |
|
*a |
Component without harness connected (Crankshaft Position Sensor) |
(a) Disconnect the crankshaft position sensor connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
3 (VCNE) - 1 (NE+) |
Always |
10 kΩ or higher |
|
3 (VCNE) - 2 (NE-) |
Always |
10 kΩ or higher |
|
1 (NE+) - 2 (NE-) |
Always |
10 kΩ or higher |
| OK |
|
REPLACE ECM
|
| NG |
|
REPLACE CRANKSHAFT POSITION SENSOR
|
|
5. |
CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM) |
(a) Disconnect the crankshaft position sensor connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
Z4-3 (VCNE) - C76-116 (VCNE) |
Always |
Below 1 Ω |
|
Z4-1 (NE+) - C76-93 (NE+) |
Always |
Below 1 Ω |
|
Z4-2 (NE-) - C76-115 (NE-) |
Always |
Below 1 Ω |
|
Z4-3 (VCNE) or C76-116 (VCNE) - Body ground and other terminals |
Always |
10 kΩ or higher |
|
Z4-1 (NE+) or C76-93 (NE+) - Body ground and other terminals |
Always |
10 kΩ or higher |
|
Z4-2 (NE-) or C76-115 (NE-) - Body ground and other terminals |
Always |
10 kΩ or higher |
| OK |
|
REPLACE ECM
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|