Fault In Circuit
Fault in circuit
Other diagnostic trouble codes (DTCs)
- Read off other diagnostic trouble codes (DTCs).
Hint: To guarantee the correct diagnostic trouble code (DTC) status, if any of the following DTCs are stored, the DTC status must be established by a status check.
Are diagnostic trouble codes (DTCs) ABS-141, ABS-143, ABS-144 or ABS-423 stored?
Yes - Status check
No - Fault in circuit. Permanent fault Fault In Circuit. Permanent Fault
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Status check
- Ignition on.
- Go into scrolling values, list 3.
Read off stop (brake) lamp switch position.
With the brake pedal up this value should read OFF. With the brake pedal depressed this value should be ON.
OK - INT
Not OK - PER
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PER
Fault in circuit. Permanent fault
Checking stop (brake) light status
- Ignition on.
- Go into scrolling values, list 3.
Read off stop (brake) lamp switch) position.
With the brake pedal up this value should be OFF. With the brake pedal depressed this value should be ON.
Is the value ON at all times?
Yes - Checking the stop (brake) light switch
No - Checking the stop (brake) light
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Checking the stop (brake) light switch
- Remove soundproofing.
- Ignition on.
- Go into scrolling values, list 3.
Disconnect stop (brake) lamp switch and read off stop (brake) lamp switch position.
Does the value change to OFF?
Yes - Checking stop (brake) lamp switch adjustment
No - Checking for a short-circuit
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Checking for a short-circuit
Check cable between control module #12 and stop (brake) lamp switch connector terminal 2 and cable to stop (brake) lamp for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
On vehicles with automatic transmission: Check cable between stop (brake) lamp switch connector terminal 2 and automatic transmission control module (TCM) #B26 for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Select "Continue" when the fault has been repaired.
Continue - Verification
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Checking stop (brake) lamp switch adjustment
Hint: The stop (brake) lamp switch is automatically adjusted.
- Remove and set stop (brake) lamp switch according to Replacing stop (brake) light switch later type Service and Repair for a new initial setting.
- Connect stop (brake) light switch.
- Brake pedal up.
- Ignition on.
- Go into scrolling values, list 3.
Read off stop (brake) lamp switch) position.
With the brake pedal up this value should be OFF.
OK - Cause of fault
Not OK - Replacing component
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Cause of fault
The cause of the diagnostic trouble code (DTC) has been incorrect adjustment of the stop (brake) light switch.
Select "Continue"
Continue - Verification
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Replacing component
Try a new stop (brake) lamp switch according to Replacing stop (brake) light switch later type Service and Repair.
Select "Continue" when the component has been replaced.
Continue - Verification
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Checking the stop (brake) light
- Depress brake pedal.
Do the stop (brake) lamps light when the pedal is depressed.
Yes - Checking for an open-circuit in the cable
No - Checking fuse 11/12
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Checking for an open-circuit in the cable
Check cable between stop (brake) lamp switch connector terminal 2 and control module #12 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 repaired.
Continue - Verification
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Checking fuse 11/12
Check that fuse 11/12 is intact.
Is fuse 11/12 intact?
Yes - Checking voltage before fuse 11/12
No - Checking for a short-circuit and replacing component
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Checking for a short-circuit and replacing component
Check cable between control module #12 and fuse 11/12 and cable to stop (brake) lamp for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
On vehicles with automatic transmission: Check cable between stop (brake) lamp switch connector terminal 2 and automatic transmission control module (TCM) #B26 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Then replace the fuse.
Select "Continue" when the fault has been repaired.
Continue - Verification
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Checking voltage before fuse 11/12
- Ignition off.
Connect a voltmeter between the rear socket (windshield side) on the fuse holder for fuse 11/12 and ground.
The voltmeter should read battery voltage.
OK - Checking power supply to stop (brake) light switch
Not OK - Checking for an open-circuit in the cable
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Checking for an open-circuit in the cable
Check cable between fuse 11/12 and battery 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 repaired.
Continue - Verification
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Checking power supply to stop (brake) light switch
- Ignition off.
- Remove soundproofing.
Connect a voltmeter between stop (brake) lamp switch terminal 1 and ground.
The voltmeter should read approximately battery voltage.
OK - Checking the stop (brake) light switch
Not OK - Checking for an open-circuit in the cable
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Checking for an open-circuit in the cable
Check cable between stop (brake) lamp switch terminal 1 and fuse 11/12 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 repaired.
Continue - Verification
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Checking the stop (brake) light switch
- Ignition off.
Connect a voltmeter between stop (brake) lamp switch terminal 2 and ground.
- Depress brake pedal.
The voltmeter should read approximately battery voltage.
OK - Checking for an open-circuit in the cable
Not OK - Replacing component
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Checking for an open-circuit in the cable
Check cable between stop (brake) lamp switch connector terminal 2 and control module #12 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 repaired.
Continue - Verification
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Replacing component
Try a new stop (brake) lamp switch according to Replacing stop (brake) light switch later type Service and Repair.
Select "Continue" when the component has been replaced.
Continue - Verification
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Verification
Hint: After carrying out the repair check that the fault has been remedied.
- Ignition on.
- Go into scrolling values, list 3.
Read off stop (brake) lamp switch) position.
With the brake pedal up this value should be OFF. With the brake pedal depressed this value should be ON.
OK - FAULT FOUND
Not OK - 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 stop (brake) light status
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No Fault Found - No Fault Found
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INT
Fault in circuit. Intermittent fault
Checking cables and terminals
Check stop (brake) lamp switch and control module connectors for contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Check cable between stop (brake) lamp switch connector terminal 1 and battery for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Check cable between stop (brake) lamp switch connector terminal 2 and control module #12 for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults , an intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults , and an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
On vehicles with automatic transmission: Check cable between stop (brake) lamp switch connector terminal 2 and automatic transmission control module (TCM) #B26 for an intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults , and an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Select "Continue" when the fault has been repaired.
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 cables and terminals
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No Fault Found - No Fault Found
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