- Open or short in camshaft position sensor circuit
- Camshaft position sensor
- Camshaft timing pulley LH
- ECM
| Last Modified: 11-29-2007 | 1.6 C | |
| Service Category: Engine/Hybrid System | Section: Engine Control | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000000TMH01JX |
| Title: 2UZ-FE ENGINE CONTROL: SFI SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
DTC |
P1340 |
Camshaft Position Sensor "A" (Bank 1 Sensor 2) |
|
DTC |
P1342 |
Camshaft Position Sensor "A" Low Input (MRE) |
|
DTC |
P1343 |
Camshaft Position Sensor "A" High Input (MRE) |
DESCRIPTION
The camshaft has a timing rotor for the camshaft position sensor. When the camshaft rotates, changes occur in the air gaps between the timing rotor and MRE element, which affects the magnet. As a result, the resistance of the MRE material fluctuates. The camshaft position sensor converts the camshaft rotation data to pulse signals, and uses the pulse signals to determine the camshaft angle, which it sends to the ECM. Then the ECM uses this data to control fuel injection time and injection timing.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
P1340 |
No camshaft position sensor signal to ECM during cranking (2 trip detection logic) |
|
|
No camshaft position sensor signal to ECM with engine speed 600 rpm or more (1 trip detection logic) |
||
|
P1342 |
Output voltage of camshaft position sensor less than 0.3 V for 4 seconds (1 trip detection logic) |
|
|
P1343 |
Output voltage of camshaft position sensor more than 4.7 V for 4 seconds (1 trip detection logic) |
MONITOR DESCRIPTION
If there is no signal from the camshaft position sensor even though the engine is turning, or if the rotation of the camshaft and the crankshaft is not synchronized, the ECM interprets this as a malfunction of the sensor. When the sensor output voltage remains less than 0.3 V, or more than 4.7 V for more than 5 seconds, the ECM sets a DTC.
MONITOR STRATEGY
|
Related DTCs |
P1340: Camshaft position sensor range check P1340: Camshaft position / Crankshaft position misalignment P1342: Camshaft position sensor range check (low voltage) P1343: Camshaft position sensor range check (high voltage) |
|
Required Sensors/Components (Main) |
Camshaft position sensor |
|
Required Sensors/Components (Related) |
Crankshaft position sensor, Engine speed sensor |
|
Frequency of Operation |
Continuous |
|
Duration |
5 seconds: P1340 camshaft position / crankshaft position misalignment 4 seconds: P1340, P1342 and P1343 camshaft position sensor range check |
|
MIL Operation |
2 driving cycles: P1340 camshaft position sensor range check Immediate: P1340 camshaft position / crankshaft position misalignment and P1342, P1343 camshaft position sensor range check |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
|
The monitor will run whenever these DTCs are not present |
None |
P1340 Camshaft Position Sensor Range Check
|
Starter |
ON |
|
Minimum battery voltage while starter ON |
Less than 11 V |
P1340 Camshaft Position / Crankshaft Position Misalignment
|
Engine RPM |
600 rpm or more |
|
Starter |
OFF |
|
Camshaft position sensor voltage |
0.3 V or more, 4.7 V or less |
P1342, P1343 Camshaft Position Sensor Range Check
|
Time after ignition switch off to ON |
2 seconds or more |
|
Battery voltage |
8 V or more |
|
Starter |
OFF |
TYPICAL MALFUNCTION THRESHOLDS
P1340 Camshaft Position Sensor Range Check
|
Camshaft position signal |
No signal |
P1340 Camshaft Position / Crankshaft Position Misalignment
|
Camshaft position and crankshaft position phase |
Misaligned |
|
Camshaft position signal |
No signal |
P1342 Camshaft Position Sensor Range Check
|
Camshaft position sensor voltage |
Less than 0.3 V |
P1343 Camshaft Position Sensor Range Check
|
Camshaft position sensor voltage |
More than 4.7 V |
COMPONENT OPERATING RANGE
|
Camshaft position sensor voltage |
0.3 to 4.7 V |
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the Techstream. Freeze frame data records the engine conditions when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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. |
INSPECT CAMSHAFT POSITION SENSOR (SENSOR POWER SOURCE) |
(a) Disconnect the camshaft 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 |
Switch Condition |
Specified Condition |
|---|---|---|
|
D59-3 (VC) - Body ground |
Ignition switch ON |
4.5 to 5.0 V |
|
|
2. |
CHECK HARNESS AND CONNECTOR (ECM - CAMSHAFT POSITION SENSOR) |
(a) Disconnect the camshaft 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 |
|---|---|---|
|
D59-2 (G2) - D56-90 (G2) |
Always |
Below 1 Ω |
|
D59-1 (G-) - D56-89 (G2-) |
Always |
Below 1 Ω |
|
D59-2 (G2) or D56-90 (G2) - Body ground |
Always |
10 kΩ or higher |
|
D59-1 (G-) or D56-89 (G2-) - Body ground |
Always |
10 kΩ or higher |
|
|
3. |
INSPECT SENSOR INSTALLATION |
(a) Check the camshaft position sensor installation.
OK:
The camshaft position sensor is installed properly.
|
|
4. |
INSPECT CAMSHAFT TIMING PULLEY LH (SIGNAL PLATE TEETH) |
(a) Check the teeth of the signal plate.
OK:
Sensor plate teeth do not have any cracks or deformation.
|
|
5. |
REPLACE CAMSHAFT POSITION SENSOR |
(a) Replace the camshaft position sensor
.
|
|
6. |
CONFIRM WHETHER DTC OUTPUT RECURS |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream ON.
(d) Clear DTCs
.
(e) Start the engine.
(f) Enter the following menus: Powertrain / Engine / Trouble Codes / Pending.
(g) Read DTCs.
Result
|
Result |
Proceed to |
|---|---|
|
No DTC is output |
A |
|
P1340, P1342 and/or P1343 are output |
B |
HINT:
If the engine does not start, replace the ECM.
|
|
|