Normal Operation and Fault Conditions
The ABS module uses an internal solid state switch to operate the hydraulic pump motor.
The ABS module tests the hydraulic pump motor by activating it for 30 milliseconds.
The ABS module monitors the voltage drop across the hydraulic pump motor while the pump motor is being activated. After 30 milliseconds have passed, the ABS module stops applying voltage to the pump motor and monitors the voltage the spinning hydraulic pump motor is generating and the voltage drop across the hydraulic pump motor solid state switch. If the monitored voltages are not within the specifications, the ABS module sets one or more DTCs.
PPT H ABS MODULE DTC FAULT TRIGGER CONDITIONS
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| C0020:16 | ABS Pump Motor Control: Circuit Voltage Below Threshold | Sets when the ABS module detects a voltage supply concern, a module ground concern, a shorted hydraulic pump motor or an internal failure of the ABS module. |
| C1B02:17 | Return Pump: Circuit Voltage Above Threshold | Sets when the ABS module detects a voltage supply concern, a module ground concern, a shorted hydraulic pump motor or an internal failure of the ABS module. |
| C1B02:71 | Return Pump: Actuator Stuck | Sets when the ABS module detects the hydraulic pump motor is shorted or seized. |