Is the Advance Trac® warning indicator illuminated?
Yes | CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, DIAGNOSE the RCM concern. REFER to: Airbag Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing). |
|---|---|
No | The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues. |
ABS Pump Motor Faults
Refer to Wiring Diagrams Cell 42 for schematic and connector information.
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 Diagnostic Trouble Codes (DTCs).
DTC Fault Trigger Conditions
DTC | Description | Fault Trigger Conditions |
|---|---|---|
C0020:11 | ABS Pump Motor Control: Circuit Short To Ground | This DTC sets in continuous memory and on-demand if the voltage drop across the solid state switch is too high when the pump motor is activated. This can be due to a shorted switch, a shorted motor or a locked motor. |
C0020:12 ABS Pump Motor Control: Circuit Short To Battery | This DTC sets in continuous memory and on-demand if the pump motor supply voltage is greater than 0.93 volt for longer than 3 seconds when the pump motor is deactivated. | |
C0020:13 ABS Pump Motor Control: Circuit Open | This DTC sets in continuous memory and on-demand if the pump motor supply voltage is less than 6 volts for longer than 2 seconds when the pump motor is deactivated. This DTC also sets if the pump motor supply voltage is less than 7.3 volts for more than 2 seconds when the pump motor is activated. | |
C0020:71 ABS Pump Motor Control: Actuator Stuck | If insufficient voltage is generated by the pump motor immediately following a pump motor deactivation, a second pump motor test is carried out. If insufficient voltage is again generated by the pump motor, this DTC sets. |
Possible Causes
Fuse Wiring, terminals or connectors HCU ABS module
Visual Inspection and Diagnostic Pre-checks
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.