Signal Too Low

Signal too low

Checking the DSA switch








- Control module connected.
- Start the engine.
- Read off the status of the switch.
Check the function of the switch: OFF should be displayed when the switch is unaffected. On should be displayed when the switch is activated (pressed in).





Is the function of the switch OK?

Yes - Signal too low. Intermittent fault

No - Checking the signal cable

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Checking the signal cable








- Control module connected.
- Start the engine.
- Read off the status of the switch.
- Carefully remove the switch from the instrument panel.
- Disconnect the switch.
Check whether the ON or OFF status is displayed.









Is the OFF status displayed?

Yes - Replacing the component

No - Checking for a short-circuit

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Replacing the component
Try a new DSA switch according to Replacing the DSA switch Replacing DSA Switch.

Select Continue when the fault has been remedied.

Continue - Verification

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Checking for a short-circuit
Check the cable between switch connector terminal 4 and control module terminal 6 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.









Select Continue when the fault has been remedied.

Continue - Verification

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Verification




Verification

Verification

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








- Ignition off.
- Reconnect the connectors, reinstall components etc.
- Control module connected.
- Start the engine.
- Read off the status of the switch.
Check the function of the switch: OFF should be displayed when the switch is unaffected. On should be displayed when the switch is activated (pressed in).





Is the function of the switch 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 DSA switch

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Signal too low. Intermittent fault





Signal too low. Intermittent fault

Checking wiring and terminals
Check that the DSA switch button does not catch or stick in the depressed position. Remedy as necessary.
Check the cable between switch connector terminal 4 and DSA control module terminal 6 for an intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults.













Select Continue when the fault has been remedied.

Continue - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Do you want to view the information again?

Yes - Attempt New Test

No - FAULT FOUND

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Attempt New Test - Attempt New Test

FAULT FOUND - FAULT FOUND

DONE - DONE

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Attempt New Test - Checking the DSA switch

FAULT FOUND - FAULT FOUND

DONE - DONE

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