TC/ABS 5.3

Brake Lights Switch. Open Circuit
Fault symptoms
No fault symptoms.

Conditions
Fault generated on open circuit for longer than 1 second.

Diagnostic help
The diagnostic tool can be used to determine the ON/OFF status of the brake-lights switch.
- 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.