System Control Mode Timeout

SYMPTOM
SYSTEM CONTROL MODE TIME-OUT

WHEN MONITORED
Ignition on.

SET CONDITION
When vehicle is in Antilock control mode. Vehicle speed is above 4 mph for 2 seconds. ABS mode is in pressure control mode for an excessive period of time two minutes.

POSSIBLE CAUSES
- Wheel speed sensor concern
- CAB - no response to input
- Brake lamp switch
- Brake switch sense circuit
- CAB - internal fault