Faulty Signal. Permanent Fault
Faulty signal. Permanent fault
EFI-314 Camshaft position (CMP) sensor, signal
Checking ground lead
- Ignition off.
- Wait for approximately 150 seconds (cars with immobilizer 245 seconds).
- Disconnect the camshaft position (CMP) sensor.
Connect an ohmmeter between the camshaft position (CMP) sensor connector terminal 1 (engine control module (ECM) side) and ground.
The ohmmeter should read approximately 0 ohms.
OK - Checking power cable
Not OK - Checking control module connector
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Checking control module connector
- Ignition off.
- Camshaft position (CMP) sensor disconnected.
- Check control module connector for contact resistance and oxidation and remedy according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
- Control module connected.
Connect an ohmmeter between the camshaft position (CMP) sensor connector terminal 1 (engine control module (ECM) side) and ground.
The ohmmeter should read approximately 0 ohms.
OK - The cause of the diagnostic trouble code (DTC) has been loose connections in the control module connector. Then continue with Verification.
Fault-tracing information
Not OK - Check cable between camshaft position (CMP) sensor terminal 1 and engine control module (ECM) #A18 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Then continue with Verification.
Checking for an open-circuit
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Fault-tracing information
The cause of the diagnostic trouble code (DTC) has been loose connections in the control module connector.
Continue - Verification
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Checking for an open-circuit
- Check cable between camshaft position (CMP) sensor terminal 1 and engine control module (ECM) #A18 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
Continue - Verification
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Checking power cable
- Ignition on.
- Camshaft position (CMP) sensor disconnected.
Connect a voltmeter between camshaft position (CMP) sensor terminal 3 (engine control module (ECM) side) and ground.
The voltmeter should read battery voltage.
OK - Checking the signal cable
Not OK - Checking control module connector
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Checking control module connector
- Ignition off.
- Camshaft position (CMP) sensor disconnected.
- Check control module connector for contact resistance and oxidation and remedy according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
- Control module connected.
- Ignition on.
Connect a voltmeter between camshaft position (CMP) sensor terminal 3 (engine control module (ECM) side) and ground.
The voltmeter should read battery voltage.
OK - The cause of the diagnostic trouble code (DTC) has been loose connections in the control module connector. Then continue with Verification.
Fault-tracing information
Not OK - Check cable between camshaft position (CMP) sensor terminal 3 and engine control module (ECM) #A36 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Then continue with Verification.
Checking for an open-circuit
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Fault-tracing information
The cause of the diagnostic trouble code (DTC) has been loose connections in the control module connector.
Continue - Verification
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Checking for an open-circuit
- Check cable between camshaft position (CMP) sensor terminal 3 and engine control module (ECM) #A36 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
Continue - Verification
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Checking the signal cable
- Ignition on.
- Camshaft position (CMP) sensor disconnected.
Connect a voltmeter between camshaft position (CMP) sensor terminal 2 (engine control module (ECM) side) and ground.
The voltmeter should read battery voltage.
OK - Checking signal cable voltage
Not OK - Checking signal cable resistance to ground
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Checking signal cable voltage
- Ignition on.
- Camshaft position (CMP) sensor disconnected.
Connect an electrician's screwdriver between camshaft position (CMP) connector terminal 2 (engine control module (ECM) side) and ground.
Does the electrician's screwdriver light?
Yes - Check cable between the camshaft position (CMP) sensor terminal 2 and engine control module (ECM) #A21 for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Then continue with Verification.
Checking for a short-circuit
No - Checking camshaft position (CMP) sensor
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Checking for a short-circuit
- Check cable between the camshaft position (CMP) sensor terminal 2 and engine control module (ECM) #A21 for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Continue - Checking camshaft position (CMP) sensor signal
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Checking signal cable resistance to ground
- Ignition off.
- Wait for approximately 150 seconds (cars with immobilizer 245 seconds).
- Camshaft position (CMP) sensor disconnected.
Connect an ohmmeter between the camshaft position (CMP) sensor connector terminal 2 (engine control module (ECM) side) and ground.
Is resistance infinite?
Yes - Checking control module connector
No - Check cable between the camshaft position (CMP) sensor terminal 2 and engine control module (ECM) #A21 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Then continue with Verification.
Checking for a short-circuit
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Checking for a short-circuit
- Check cable between the camshaft position (CMP) sensor terminal 2 and engine control module (ECM) #A21 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Continue - Verification
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Checking control module connector
- Ignition off.
- Camshaft position (CMP) sensor disconnected.
- Check control module connector for contact resistance and oxidation and remedy according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
- Control module connected.
Connect an ohmmeter between the camshaft position (CMP) sensor connector terminal 2 (engine control module (ECM) side) and ground.
The ohmmeter should read 0.5 - 3.0 kohms.
OK - The cause of the diagnostic trouble code (DTC) has been loose connections in the control module connector. Then continue with Verification.
Fault-tracing information
Not OK - Check cable between the camshaft position (CMP) sensor terminal 2 and engine control module (ECM) #A21 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Then continue with Verification.
Checking for an open-circuit
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Fault-tracing information
The cause of the diagnostic trouble code (DTC) has been loose connections in the control module connector.
Continue - Verification
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Checking for an open-circuit
- Check cable between the camshaft position (CMP) sensor terminal 2 and engine control module (ECM) #A21 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
Continue - Verification
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Checking camshaft position (CMP) sensor
- Connect the camshaft position (CMP) sensor.
Try to start the engine.
Does the engine start?
Yes - The cause of the diagnostic trouble code (DTC) has been loose connections in the camshaft position (CMP) sensor and/or engine control module (ECM) connectors. Check connectors for contact resistance and oxidation and remedy in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Then continue with Verification.
Checking for contact resistance and oxidation
No - Try a new camshaft position (CMP) sensor. Then continue with Verification.
Replacing component
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Checking for contact resistance and oxidation
The cause of the diagnostic trouble code (DTC) has been loose connections in the camshaft position (CMP) sensor and/or engine control module (ECM) connectors.
- Check connectors for contact resistance and oxidation and remedy in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
Continue - Verification
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Replacing component
- Try a new camshaft position (CMP) sensor.
Continue - Verification
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Checking camshaft position (CMP) sensor signal
- The camshaft position (CMP) sensor may fail if there has been a short-circuit to supply voltage in the signal cable. Check camshaft position (CMP) sensor as follows.
- Connect the camshaft position (CMP) sensor.
Try to start the engine.
Does the engine start?
Yes - Camshaft position (CMP) sensor OK.
Fault-tracing information
No - Try a new camshaft position (CMP) sensor. Then continue with Verification.
Replacing component
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Fault-tracing information
Camshaft position (CMP) sensor OK.
Continue - FAULT FOUND
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Replacing component
- Try a new camshaft position (CMP) sensor.
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied as follows:
- Ignition off.
- Reconnect connectors and reinstall components.
- Try to start the engine.
Does the engine start?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFIED - FAULT FOUND
VERIFICATION FAILED - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Checking ground lead
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