Suspension Control - Computer Command Ride (CCR/SSS)

CODE 35 SPEED SENSITIVE STEERING ERROR












TEST CONDITIONS:
The Control Module monitors the steering assist solenoid valve (speed sensitive steering solenoid valve) PWM drive (pin D15) for high voltage (on) and low voltage (off) levels.

FAULT CONDITIONS:
If output drive activity is not correct, the output drive is unable to function as intended, due to a short or open circuit condition or a Control Module or solenoid valve fault.

ACTION TAKEN:
Set code 35,
Turn on "SERVICE CCR"/"SERVICE SSS" tell tale lamp,
Disable steering assist output,
Attempt to recover once every 30 seconds.

DESCRIPTION:
The Control Module regulates the amount of steering assist at a given vehicle speed by driving the steering assist solenoid valve with the correct PWM duty cycle. The amount of steering assist decreases with increasing duty cycle. See Figure 24 for a typical duty cycle vs. speed curve. The Control Module constantly monitors the steering assist solenoid valve PWM drive for correct activity. At times, the Control Module expects the output to be high (on) and at times it expects the output to be low (off). At other times, the Control Module expects the output to cycle between high and low levels. If the expected level or cycling is not detected, the Control Module stores error code 35, activates the "SERVICE CCR"/ "SERVICE SSS" telltale lamp and de-activates the steering assist drive. Recovery of the steering assist output fault will occur if normal activity is detected after a 30 second delay.