ABS 5.4

Brake Light Switch. Open Circuit.

Fault symptoms
No fault symptoms.

Conditions
DTC will be generated if there is a break in circuit continuity for more than 1.0 s.

Diagnostic help
The diagnostic tool can be used to determine the status of the brake-light switch (Open/Closed).
- Select: "Read values".
- Select: "Brake-light switch".

Diagnostic procedure
1. Checking Brake Lights Functionality





^ Check that the brake lights come on when the pedal is depressed.

Is the function correct?

NO
Go To Step 2

YES
Go To Step 3

2. Checking Brake Lights Functionality
^ See fault diagnosis for the brake lights, refer to lighting and horns.

3. Rectifying The Lead





^ Repair or replace the lead between pin 14 of the control module and pin 3 of the brake lights switch.

When repair is complete
Go to step 4

4. Final Check





^ Clear the diagnostic trouble codes in all systems.





^ Carry out a drive cycle
Drive the car at varying engine loads and engine rpm for five minutes.

^ Evaluate the drive cycle:





^ Check that the diagnostic trouble code has not recurred

Is the function correct?

YES
Go To Step 5

NO
Go To Step 6

5. Final Check
The steps taken to correct the fault were correct.
^ Diagnosis is complete.

6. Final Check
See Before changing a control module, refer to General Fault Diagnosis.
^ Diagnosis for this fault code is complete.