Signal Too High

Signal too high

Checking the component




- Ignition on.
Check the sun sensor signal by varying the intensity of the light that it detects.
Cover the sun sensor with your hand to obtain the minimum signal, approximately 0.5 volts.
Then direct a strong light source (for example a flashlight) at the sun sensor from close range to increase the signal.

Hint: If the signal from the sun sensor is constantly above 4.85 volts, there is either an open-circuit in the cable or the sun sensor is defective.

Note! The illustration only shows the method. The appearance of the sun sensor can vary between different models.









Continue - Checking the wiring

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Checking the wiring




- Ignition off.
Check the signal cable between the central electronic module (CEM) and the sun sensor. Check for an open-circuit. Check for a short-circuit to supply voltage.
Take readings between:
- Central electronic module (CEM) terminal #D30 (#30) and sun sensor terminal #1
- Central electronic module (CEM) terminal #D42 (#42) and sun sensor terminal #5.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- Signal specification Pinout Values and Diagnostic Parameters
- Sun sensor / alarm LED, replacing Service and Repair
- Central electronic module (CEM), replacing Central Electronic Module (CEM), 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.








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Check the signal from the sun sensor by varying the light intensity at the sun sensor. Cover the sun sensor with your hand to obtain a minimal signal. Then direct a strong light source (for example a flashlight) at the sun sensor from close range to obtain a maximum signal.
The value must vary between approximately 0.5 and 4.85 V.









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 the wiring

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