Signal Too High
Signal too high
Checking the stop lamp switch
- Start the engine.
Read off the status of the stop lamp switch.
When the brake pedal is unaffected, the value should be OFF. When the brake pedal is depressed the value should be ON.
OK - Signal too high. Intermittent fault
Not OK - Checking the status of the stop lamp
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Checking the status of the stop lamp
- Ignition on.
Check whether any of the stop lamps light even though the brake pedal is not depressed.
Are any of the stop lamps lit?
Yes - Checking and adjusting the stop lamp switch
No - Checking the signal cable
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Checking and adjusting the stop lamp switch
- Start the engine.
Check that the stop lamp switch is correctly adjusted. It must notbe activated when the brake pedal is released.
Is the stop lamp switch activated when the brake pedal is released?
Yes - Fault causes and adjusting the stop lamp switch
No - Checking the stop lamp switch
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Fault causes and adjusting the stop lamp switch
The cause of the diagnostic trouble code (DTC) was incorrect adjustment of the stop lamp switch.
Adjust the stop lamp switch according to Stop lamp switch, adjustment Adjustments.
Continue - Verification
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Checking the stop lamp switch
- Disconnect the stop lamp switch.
Check whether the stop lamps go out.
Do the stop lamps go out?
Yes - Replacing the component
No - Checking for a short-circuit
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Replacing the component
Try a new stop lamp switch according to Replacing the stop lamp switch Removal and Replacement.
Continue - Verification
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Checking for a short-circuit
Check the wiring between stop lamp switch terminal #3, the stop lamps and DSA control module terminal #7. Check for a short-circuit to supply voltage 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 lamp switch terminal #2. Check for a short-circuit to supply voltage 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.
Continue - Verification
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Checking the signal cable
- Ignition on
- DSA control module connected.
- Brake pedal unaffected.
Connect a voltmeter between ground and DSA control module connector terminal #7.
Other information
- To connect the breakout box for DSA, see Connecting the breakout box. DSA Connecting The Breakout Box. DSA.
The voltmeter should read approximately 0 V.
OK - Fault cause and diagnostic testing for contact resistance and oxidation
Not OK - Checking for an open-circuit
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Fault cause and diagnostic testing 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 according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Remedy if necessary.
Continue - Verification
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Checking for an open-circuit
Check the cable between DSA control module terminal #7 and one of the stop lamps. Check for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
If the cable is OK: Check the stop lamp bulbs. Check the ground terminal. Check for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off.
- Reconnect the connectors, reinstall components etc.
- DSA control module connected.
- Start the engine.
Read off the status of the stop (brake) lamp switch.
When the brake pedal is unaffected, the value should be OFF. When the brake pedal is depressed the value should be ON.
OK - VERIFIED
Not OK - 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 - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Checking the stop lamp switch
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Signal too high. Intermittent fault
Signal too high. Intermittent fault
Checking wiring and terminals
Check the DSA control module connector. Check for contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Check the cable between DSA control module terminal #7 and one of the stop lamps. Check for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults. Check for an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Check the stop lamp ground terminal. Check for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Check the wiring between DSA control module #7 and the ABS control module, the automatic transmission control module (TCM) and the cruise control control module. Check for an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
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 - Checking the stop lamp switch
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