Signal Missing

Signal missing

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 an open-circuit.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting the Breakout Box
- Signal specification Signal Description / Specification
- Camshaft seal/variable valve timing (VVT) unit, replacing Camshaft Seal/Variable Valve Timing (VVT) Unit, Replacing
- 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.




- Start the engine and run it to operating temperature and then let it run at idle speed
- Read off the angle of the camshaft (actual value) and the its desired angle (target value).
At idle speed with the engine at operating temperature, check that the camshaft shift angle (actual value) and the desired value correspond with an accuracy of approximately 8° CA. Rev the engine a few times and check again at idle speed that the values correspond.

Hint: If this check is carried out during a road test under load, the results will be clearer because camshaft control will be more active.

The difference between the values can be read off in the lower digital display.





Is the function OK?

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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