Dual circuit steering PWM 3 Overload.
• Check wiring (to M55, PWM Output 3) • Check connectors (to M55, PWM Output 3) • Check dual circuit steering solenoid o Measure the resistance between the two inputs to M55, it should be around 20 ohms o Measure the resistance between the outputs from M55 to the electric motor  When the solenoid is off, i.e. no applied voltage over the solenoid inputs, the resistance between the solenoid outputs to the electric motor should be infinite  When the solenoid is on, i.e. the applied voltage over the solenoid inputs is 24 V, the resistance between the solenoid outputs to the electric motor should be quite low, around a few Ohms. • Measure the applied solenoid voltage between signal to M55 and ground. It should be 24 V. Invalidate error and reset turned off output by resetting the CMS.
What you'll see
This DTC covers short circuiting to ground and over-current. They cannot be electrically separated, because over-current could be caused by short circuiting the output to ground. It will not be possible to turn on the solenoid when this DTC is active, since the output is turned off when the fault persists. Consequently, the motor cannot be activated. A warning will be displayed in the ICL. If a simultaneous sensor malfunction in the primary hydraulic system is present, a (different) warning will be displayed in the ICL. If a simultaneous hydraulic malfunction in the primary hydraulic system is present, a (different) warning will be displayed in the ICL.
System reaction
Amber failure in circ 1 and 2 Red failure in circ 1 and 2 Amber failure steering circ 2
Diagnostic depth
Dual Circuit Steering solenoid output (Component M55), PWM Output 3 (signal A15, ground A13), controlling electric motor and flow in secondary circuit is over loaded.
• Defect wiring o Short circuit to ground • Defect connectors • Defect dual circuit steering solenoid o Internal short circuit