Faulty Control

ECM-644A CAMSHAFT RESET VALVE
FAULTY CONTROL

Checking component



Check camshaft position (CMP) sensor connector for contact resistance and oxidation according to [1][2]Checking Wiring and Terminals. Permanent Fault

Remedy as necessary

Other information:
- For the camshaft reset valve diagnostic functions, Camshaft Diagnostics
- To access/replace the camshaft reset valve, Variable Valve Timing Solenoid, Replacing
- For information about signals, see Diagnostic Parameters and Pinout Values. Signal Description, ME7, B5XX4T


Verification



Hint: After carrying out the repair, check that the fault has been remedied.

- Ignition off.
- Reinstall the connectors, components etc.
- Ignition on.
- Start the engine. Let it idle for at least 30 seconds.
- Neutralize the idling conditions. Carefully depress the accelerator pedal (AP) for 5 seconds, keeping the engine speed (RPM) below 1,200 rpm.
- Then release the accelerator pedal (AP) so that the engine returns to idling.
- Read the adaptation values for the camshaft. Check that all values are below 7 degrees.

Are all adaptation values below 7 degrees?
Yes - Testing Complete.
No - Continue below.


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.