Signal Missing - Permanent Fault

ECM-6440 CAMSHAFT RESET VALVE
SIGNAL MISSING - PERMANENT FAULT

Checking connector



- Ignition off.
- Check reset valve connector for contact resistance and oxidation according to [1][2]Checking Wiring and Terminals. Permanent Fault
- Reinstall components, reconnect connectors etc.
- Ignition on.
- Start the engine.
- Increase engine speed (RPM) on the engine and Read the camshaft timing alterations.

If the camshaft timing changes it means that the cause of the fault has been loose connections in the connector.

Other information
- To access/replace the camshaft reset valve, Variable Valve Timing Solenoid, Replacing

Is the function OK?
Yes - Test Complete.
No - Continue below.


Checking component and wiring



Check reset valve camshaft resistance between # 1 and # 2, resistance should be approximately 3.7 ohm.

Check the signal cable between engine control module (ECM) # A13 and camshaft reset valve # 2 for an open-circuit according to [1][2]Checking Wiring and Terminals. Permanent Fault

Check power supply cable # 5 and camshaft reset valve # 1 for an open-circuit according to [1][2]Checking Wiring and Terminals. Permanent Fault

Remedy as necessary.

Other information:
- To connect the breakout box Connecting the Breakout Box (ECM)
- To access/replace the camshaft reset valve, Variable Valve Timing Solenoid, Replacing
- With the ignition on and camshaft reset valve connector disconnected the voltage on connector # 1 should be approximately Ubat and connector # 2 be a pulse modulated signal with top voltage at approximately Ubat and with a frequency of approximately 250 Hz.
- 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 connectors, components etc.
- Ignition on.
- Start the engine.
- Increase engine speed (RPM) on the engine and Read the camshaft timing alterations.

Is the function OK?
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.