T8 / P0572 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Cruise control not working.
Brake Switch Circuit, Short to Ground/B+
Fault symptom
Cruise control not working.
On-board diagnosis
Type of diagnosis:
Enable criteria:
Fault criteria:
| No status change for the brake light switch when vehicle speed has been reduced from 40 - 3 km/h (25 - 2 mph) within a period of 2 - 12 s. |
| A DTC is generated if this occurs 4 consecutive times. |
Dependent:
System reaction to a fault:
| Cruise control switched off. |
OK report:
| Status change for the brake pedal switch has occurred. |
Fault handling:
| Type III without Check Engine. |
| (See section Fault handling III, "Other emission-related components and functions" for more information.) |
Checking the wiring harness
Move the wiring harness at several spots and in several directions to reveal intermittent breaks and short-circuits. Check switches, connectors and crimp connections for oxidation, retracted pins and pin clamping force.
Diagnostic help
Diagnosis regards:
| Electrical fault in connecting leads or component. |
Functions in the diagnostic tool related to the fault:
| • | Brake pedal switch, cruise control |
| (See also description of readings/activations in diagnostic tool) |
