Faulty Signal. Permanent Fault
Faulty signal. Permanent fault
Checking the signal cable
- Ignition off
- Expose the DSA control module
- Ignition on
- DSA control module connected.
- The brake pedal is released.
Connect a voltmeter between ground and DSA control module connector terminal 7.
The voltmeter should read approximately 0 V.
OK - Checking a voltage drop in the signal cable
Not OK - Checking for an open-circuit
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Checking for an open-circuit
Check the cable between DSA control module terminal 7 and one of the stop (brake) lamps for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Check the central electrical module (CEM) connector for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
If the cable is OK, check the stop (brake) lamp bulbs and the stop (brake) lamp ground terminal for an open-circuit 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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Checking a voltage drop in the signal cable
Hint: All stop (brake) lamps must be intact during this check. This is so that the voltage in the circuit is as high as possible.
- Ignition on
- DSA control module connected.
- Depress the brake pedal. Hold it depressed.
Connect a voltmeter between ground and DSA control module connector terminal 7.
The voltmeter should read 0- 1.5 V below battery voltage.
OK - Fault cause and checking for contact resistance and oxidation
Not OK - Checking a voltage drop in the stop (brake) lamp switch
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Fault cause and checking for contact resistance and oxidation
The cause of the diagnostic trouble code (DTC) was loose connections in the DSA control module connector.
Check the control module connector for contact resistance and oxidation and remedy 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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Checking a voltage drop in the stop (brake) lamp switch
- Ignition on
- DSA control module connected.
- Depress the brake pedal. Hold it depressed.
Connect a voltmeter between stop (brake) lamp switch connector terminals 2 and 1.
The voltmeter should read 0- 1.5 V.
OK - Checking for contact resistance and oxidation
Not OK - Replacing the component
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Checking for contact resistance and oxidation
Check the circuit for stop (brake) lamp switch connector terminal 1 for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Check the cable between DSA control module terminal 7 and stop (brake) lamp switch terminal 2 for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
The connection is via the central electrical module. The input signal is via terminal B1:3. The output signal is via terminal B1:4 to the DSA control module.
Check the central electrical module (CEM) connector for contact resistance and oxidation 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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Replacing the component
Check that the correct bulbs are installed in the stop (brake) lamps. Check that no extra power consuming components are connected to the circuit.
Then replace the stop (brake) lamp switch according to Replacing the stop lamp switch Service and Repair.
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.
- Start the engine.
- Depress the brake pedal. Hold it down for approximately 10 seconds.
Read off the status of the diagnostic trouble code (DTC).
Has the status changed to intermittent?
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 signal cable
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