Signal Too Low

Signal too low

Checking wiring and terminals

Hint: With the ignition on and the reset valve connector disconnected, the voltage at connector terminal #1 must be approximately Ubat and at connector terminal #2 it must be a pulse width modulated signal with a peak voltage of approximately Ubat and with a frequency of approximately 250 Hz.

Check the resistance between connector terminals #1 and #2 on the camshaft reset valve. The resistance must be approximately 3.7 ohms.
Check the signal cable between engine control module (ECM) terminal #A12 (#A12) and connector terminal #2 (on the camshaft reset valve). Check for a short-circuit to ground.
Remedy as necessary.

Other information:
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box
- To access and replace the camshaft (Variable valve timing (VVT)) reset valve on the exhaust side, see Camshaft seal/variable valve timing (VVT) unit, replacing Camshaft Seal/Variable Valve Timing (VVT) Unit, Replacing
- For information about signals, see Signal specification Signal Description / Specification
- To fault-trace the wiring and terminals, see Checking wiring and terminals Checking Wiring And Terminals.






Continue - Verification

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Verification




Verification

Verification

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








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Activate reading off the actual and desired values for the reset valve. Check that they are approximately the same at different engine speeds (RPM).
The values cannot be compared at idle speed, when variable valve timing (VVT) is at 0. Variable valve timing (VVT) is also at 0 when a fault is stored. When the car is stationary, it may be difficult for the variable valve timing (VVT) to change unless a quick and powerful surge occurs. This is because the load is too low. However, variable valve timing (VVT) is always activated at extremely high engine speeds (RPM).
Is the function OK?





Is the value within its permitted range?

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 - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking wiring and terminals

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